CROSS-REFERENCE TO RELATED APPLICATIONS [0001] The present application claims the benefit of United States Patent Application

No. 16/824,209 (18944.18.3) filed March 19, 2020, United States Provisional Patent Application No. 62/991,889 (18944.18.4) filed March 19, 2020, United States Provisional Patent Application No. 16/942,166 (18944.18.5) filed July 29, 2020, and United States Patent Application No. 16/709,674 (18944.18.2) filed December 10, 2019. Each of the above applications is herein incorporated by reference in its entirety.

BACKGROUND OF THE INVENTION 1. The Field of the Invention

[0002] The present invention is in the field of modular building construction methods and systems used within the construction industry. 2. The Relevant Technology

[0003] Building construction systems including modular features are sometimes used in the construction field. For example, particularly in third world countries where skilled labor is not readily available, and building materials must be relatively inexpensive, cinder block or brick materials are used in constructing homes, schools, agricultural buildings, and other buildings. It can be difficult to learn to lay block or brick while keeping the walls square and plumb. In addition, such systems require mortar to hold the individual blocks or bricks together. A roof formed from a different material (other than block or brick) is needed. In addition, insulating and/or providing an air-tight seal (e.g., to employ negative pressurization) within such structures is difficult. [0004] Stick frame construction methods are of course also well known, although such systems also require a considerable amount of skilled labor to construct a building therefrom. In addition to requiring skilled labor, such existing methods also require considerable strength for those involved in the construction. Because of such requirements, in practice, such construction systems are not readily usable by groups of both men and women, where women often make up the vast majority of the labor pool available in third world humanitarian construction projects.

[0005] Various other building materials and systems are also used in the art. Structural insulated panels (SIPs) are used in some circumstances within the construction industry as an alternative to stick frame construction with insulation blown or laid within the cavities between stick framing members. A typical structural insulated panel may include an insulating layer sandwiched between two layers of structural plywood or oriented strand board (“OSB”). The use of such panels within residential, commercial or other construction projects can often significantly decrease the time required for construction, and also typically provides superior insulating ability as compared to a traditional structure constructed of block or brick, or even stick frame construction with insulation blown or laid between frame members. That said, drawbacks with such systems is that stick frame construction and SIP construction typically require some level of skilled labor, and thus are not particularly well suited for use in environments where such skills are not readily available, and shipping such panels can represent a significant expense. In addition, heavy equipment (e.g., cranes) are often required to install such panels.

SUMMARY

[0006] In one aspect, the present invention is directed to various building construction systems and methods. Such systems and methods may employ a plurality of modular panels, which may be based on a common modularity within each panel. The system could also be a fractal system, e.g., where larger panels could be provided, based on multiples of such a base panel. In any case, the modularity and particular panel design of the system also allows the modular panels to be easily and quickly cut, where the building blueprints dictate the need for only a portion of the overall modular panel length. Such modular characteristics will be apparent, in the following disclosure.

[0007] Furthermore, many existing systems provide excellent flexibility, but with that flexibility, there is significant room for error, such that skilled labor is required. Other systems that may employ a system of panels may reduce the room for error, but greatly reduce the available flexibility, necessitating use of many custom components and solutions to accommodate needs that the system does not anticipate. The present system provides a happy medium between providing flexibility, and requiring only little if any skilled labor.

[0008] A modular panel for use in construction may include a lightweight (e.g., foam) body, and one or more channels extending horizontally through a length of the panel. Each channel may be configured in size and shape to receive a flexible elongate spline therein, wherein each spline once received in the channel is at least partially disposed within the lightweight body, without the spline being exposed on the large outside planar face of the body.

[0009] One advantage of the present system is that the splines may simply be ripped strips of oriented strand board (OSB) or the like, which is readily available throughout nearly the entire world, and which is also more flexible in a direction that is normal to the width of the OSB spline (i.e., in the direction of its thickness), than would be typical for dimensional lumber, even of the same dimensions. Metal splines (e.g., aluminum) may also be used. For example, while Applicant has also developed earlier systems which use dimensional lumber as splines, it was found that because such lumber is notorious for being warped, it can be difficult to easily insert each spline into its corresponding channel, when a significant fraction of 2x4s or other dimensional lumber is warped, particularly where the channel is closed on all sides of a transverse cross section through the panel and channel. Flexible strips of OSB or similar material, or metal splines are far more easily inserted into the channels, as described herein, particularly where the channels are open along top or bottom edges of the panel (but are closed once the next panel is stacked thereon). In addition to wood splines, it will be apparent that metal or other splines (e.g., steel or aluminum, plastic, etc.) are of course also usable, e.g., where it may be desirable to avoid the use of wood.

[0010] The channels may include pairs of top and bottom channels, offset from the center of the thickness of the foam body, for use in providing horizontally extending I- beams at the top and bottom of each panel. For example, stacked panels may include an I-beam that is formed in-situ (or provided pre-formed), during construction of the wall, between such stacked panels. For example, as the panel is placed, the elongate splines are positioned in the top and/or bottom channels, another spline is positioned between such splines to form the central web portion of the I-beam (where the splines in the channels form the end flanges of the I-beam), and the next panel is stacked on top of the first panel. Of course, a pre-fabricated I-beam (e.g., formed of OSB, aluminum, or other suitable material) could also be similarly placed. The bottom channels of the second panel receive initially exposed portions of the splines forming the flanges of the I-beam inserted in the first panel, hiding these splines (and the I-beam) between and within the pair of stacked panels. It is advantageous that the splines run only one direction (e.g., horizontally) through the panel, without any transverse splines (e.g., vertical splines) required. It is also advantageous that the panel be of a consistent cross-section along its length (i.e., the cross-sectional shape does not change, as taken anywhere from one end to the other), which allows the panel to be easily formed by extrusion, or by hot wire CNC cutting, for example. While other panels exist, e.g., as disclosed in US 2,202,783 to Morrell, such panels require placement of splines both horizontally and vertically, and necessarily include both horizontal and vertical channels within the panel to accommodate such splines. Where both horizontal and vertical channels are included in such a panel, it is impossible for the panel to include a transverse cross-section that remains consistent across its entire length, from one end to the other. As such, such panels cannot be formed by extrusion, or a simple single step hot-wire CNC cutting method, making them more expensive and complex.

[0011] The panels may optionally include one or more interior channels (e.g., for receipt of stiffening members, e.g., such as a furring strip), as well as a pre-cut slot in a first face of the modular panel, centered on the interior channel, where the pre-cut slot extends through the thickness of the foam at the first face of the panel, into the interior channel. In other words, such a narrow pre-cut slot may provide access into the channel from one exterior face of the panel. The width of such a pre-cut slot may be relatively thin, to ensure that a stiffening member (e.g., spline or furring strip) that may also be inserted into such interior channel remains restrained in the channel. For example, such a pre-cut slot may be no more than 0.25 inch, or no more than 0.125 inch wide, e.g., less than 20%, less than 15%, less than 10%, or less than 5% of the transverse cross-sectional length (e.g., a length of 2-6 inches may be typical) of the channel.

[0012] The opposite face of the modular panel may similarly include a pre-cut slot also aligned with an interior channel corresponding to the second (opposite) face of the panel, having similar characteristics as described above relative to the pre-cut slot in the first face of the panel.

[0013] When it becomes necessary to cut a modular panel (e.g., where a wall being built requires only a portion of the length of such a “full” panel), this is easily accomplished, as the panel may be formed from expanded polystyrene (“EPS”) or another similar insulative foam material.

[0014] The panels themselves are cut on a CNC controlled hot wire cutting device, which is capable of making very precise cuts, so that the panels themselves are very accurate in their geometry (e.g., to within 0.001 inch). Thus, the panels may be of any desired thickness, e.g., as dictated by the particular desired wall thickness. For example, a foam panel thickness of 5.5 inches may be equal in width to a 2x6 (which is actually 5.5 inches wide, rather than 6 inches wide). By way of further example, a panel corresponding to 2x8 dimensions may be 7.25 inches thick. A typical 7.25 inch thick foam panel may include channels cut with the CNC device that are sized to accept ½ inch or 5/8 inch thick OSB ripped splines, having a width of typically 2-6 inches (e.g., 3- 4 inches), although it will be apparent that such dimensions could be varied, as needed. Where aluminum or other material splines are used instead of OSB, they may be thinner, while still providing similar strength characteristics.

[0015] The various channels may be off-center relative to the thickness of the foam body, and parallel to one another. For example, the various first channels (at least one top, and one bottom) may be positioned closer to the first face of the foam body, and the various second channels (also at least one top and one bottom) may be positioned closer to the second face of the foam body. Any of such channels may be generally rectangular in cross-section, with a length (i.e., the channeTs height) of the transverse cross-section rectangle oriented vertically, for desired orientation of the flexible splines therein. As described above, an exemplary panel may include a pair of spaced apart top channels, exposed at the top end of the panel, a pair of spaced apart bottom channels, exposed at the bottom end of the panel, and optionally, a pair of interior channels, between the top and bottom channels. All such channels may receive splines during wall construction, and are configured so that such splines received therein are not exposed at the large planar exterior faces of the panel. The splines in the top (or bottom) channels may initially be exposed, until covered by the next panel, which is stacked over the initially placed panel. For example, the uncovered portion of splines positioned in the top channels becomes received in the bottom channels of the next panel, stacked over the first panel. Walls, floors, and roofs can be constructed from such a series of repeating placement of panels, connected by the I-beam (or other shaped) splines between adjacent panels. Specially configured transition panels are also described herein, for making the transition from wall to floor, or from wall to roof, which transition panels include similar channels, for joining with the standard panels in the same manner (i.e., using the same I- beam or similar splines) as the standard panels are joined to one another.

[0016] For example, first and second top channels extend horizontally through the length of the body, with the first and second top channels being aligned above the first and second interior channels, respectively (if interior channels are even present). There may also be provided first and second bottom channels extending horizontally through a length of the body, where the first bottom channel is aligned with and below the first top channel, and the second bottom channel is aligned with and below the second top channel. The top and bottom channels may be exposed and open at their top and bottom edges respectively, of the body. Each of the top and bottom channels may be generally rectangular in cross section, with the length of the transverse cross-section rectangle oriented vertically, so that each top and bottom channel is configured to also receive a flexible elongate spline therein. For example, where I-beam splines are used, the channels receive a portion of (e.g., one end of) flanges of such an I-beam. The central web of such an I-beam lays on the top (or bottom) edge of the panel, while the other portion of the flanges (the opposite end) is received in the adjacent panel, as the panels are stacked (in a wall) or laid adjacent to one another (in a roof or floor).

[0017] The panel may be configured to provide a horizontal I-beam at the top and bottom of the panel, so that the splines (or portions thereof in the case of a pre-assembled I-beam) in the top channels become flanges of such a top positioned I-beam, and the splines (or portions thereof in the case of a pre-assembled I-beam) in the bottom channels become flanges of a bottom positioned I-beam. A web center portion of each I- beam member can be positioned on a top (or bottom) edge of the foam body, so as to be positioned between the splines inserted in the top (or bottom) channels, so as to form I- beams at the top and bottom edges of the foam body. Such a construction results in horizontal I-beams running horizontally through the wall (or floor, or roof) being constructed with such a building system. The panels can be positioned between adjacent vertical post members, such that there is actually no need at all for vertical stud members within the panels of the wall construction, although the building system is still fully compatible with existing building codes.

[0018] The present disclosure also relates to wall systems, as well as methods of construction that use modular panels such as those described herein. For example, such a wall system may include a plurality of modular panels such as those described herein, in combination with a plurality of flexible splines that may serve as interior splines, as well as forming the horizontally extending I-beam members at the top and/or bohom of each panel. The modular panels are typically of a size such that they will not provide the entire height of a typical wall or room being constructed (e.g., they may only be 2 or 4 feet high), but it will typically be required to stack such panels one on top of another to achieve a desired wall height. The top and bottom exposed channels of each panel may be of a depth such that they only receive a portion (e.g., about half) of the width of the spline being received therein, which forms the flange of the I-beam member. The adjacent channels of the next adjacent channel may receive the other portion of the spline (I-beam flange). In other words, the top exposed channels may receive the bottom portion (e.g., bottom half) of the splines that form the flanges of the I-beam member positioned at the top of that panel, while another panel is positioned directly over the web of the I-beam member at the top of the first panel, into which the top portion (e.g., top half) of the splines that form the flanges of the I-beam member are also received. This arrangement may be repeated as necessary, depending on the desired wall height. [0019] Another advantage of the present systems is that because the horizontal splines (or entire I-beam) are generally restricted to movement within a single degree of freedom (only along the longitudinal direction of the channel - horizontally, either left to right), once the wall is assembled, it is not necessary that the splines inserted into a given channel be of a single, unitary piece of spline material. For example, scraps of OSB or other spline materials may be advanced or inserted into the channels, to make up the needed spline length. Such ability reduces on-site construction waste, as such small spline lengths may be simply pushed sequentially into the channel, forming the needed spline. There may even be no need to attach such small spline segments together in at least some cases, although they could be attached to one another (e.g., glued, nailed, screwed, or the like) if desired. For example, they may simply become trapped in the interior channels of the panel, between adjacent posts of the wall. Post members positioned between panels may be formed of dimensional lumber, or other standard dimensional material, steel, etc. For example, in an embodiment, a frame is formed, providing the overall shape of the building (e.g., from steel, aluminum, or other standard dimensional material), and then the panels are then used to fill in the space between such frame members, forming the walls, floor, and roof. I-beam or other splines extend between (e.g., horizontally) adjacent panels. Ear brackets or the like can be used to connect the spline within the panel channels to the adjacent frame member (i.e., so that the spline (including the ear bracket) extends beyond the panel, for integration/attachment to the post positioned between adjacent side-by-side panels). Specially configured transition panels provide transitions between wall-to-floor, and wall-to-roof, where the transition panels include the same channel structures, to connect to the adjacent standard panel (of the wall, floor or roof) in the same manner (panel connected to I-beam spline, connected to adjacent panel).

[0020] As mentioned, the present building systems may include a specially configured transition panel for making a transition from a wall (e.g., constructed using the standard panels described herein) to a roof structure, or from a wall to a floor (which can also be constructed using the standard panels). In an embodiment, the roof and/or floor may similarly be constructed of the same standardized panels as the wall. Such transition panels are similarly lightweight (e.g., formed from EPS foam). The wall-to-roof transition panel may be formed as a single piece of lightweight foam material, forming a transition between the wall structure and the roof structure. The wall-to-roof transition panel may similarly include channels for receiving splines as the standard wall panels described herein, for providing a horizontally extending I-beam between the wall-to-roof transition panel and the top standard panel of the wall structure below. The wall-to-roof transition panel may include another pair of exposed channels for receiving splines, for forming an I-beam between the wall-to-roof transition panel and the adjacent roof panel (which may be a standard panel, identical or similar to the standard wall panel).

[0021] Such a wall-to-roof transition panel may dictate the pitch of the roof structure, by having the desired pitch built into the panel, as the angle between the channels that engage with the adjacent wall panel (in a wall leg of the transition panel), and the channels that engage with the adjacent roof panel (in a roof leg of the transition panel). [0022] The wall-to-roof transition panel may also include any desired overhanging eave structure that overhangs the underlying wall structure. Such transition panel includes the eave, with a desired eave length. It is advantageous to be able to provide such an eave as part of the single piece transition panel (e.g., rather than assembling an eave from numerous components that are typically nailed/screwed together). In an embodiment, the wall-to-roof transition panel may include additional slots or channels into which stiffeners (e.g., OSB, aluminum, or other material) could be inserted. For example, such slots or channels (used interchangeably) could be positioned in the overhanging eave portion of the panel so that when such stiffeners are inserted, they strengthen the foam in the eave portion of the panel, or provide an underlying attachment point, reducing any risk of damage to the eave. Such eave slots may run parallel to the other channels of the panel (e.g., horizontally). Such furring slot may be of any desired cross-sectional geometry (e.g., an I-beam shape, H-shape, C-shaped, L-shaped, or the like). [0023] A wall-to-floor transition panel may similarly be provided, for providing a transition from standard panels used in constructing a wall, to standard panels used in constructing a floor. Such a wall-to-floor transition panel may include a top portion that is identically configured to the standard panels, with channels at a top edge of the panel, for receipt of flanges of an I-beam spline therein. Rather than positioning the bottom channels in the bottom edge of the wall-to-floor transition panel, the bottom channels may be in the major face of the panel, at a lower portion thereof, for engagement with a corresponding I-beam spline. It is important that even though the bottom channels are in the major planar face of the wall-to-floor transition panel, they are at a position where they will not be exposed on the planar face, once the wall-to-floor transition panel is connected to an adjacent standard panel of the floor (which receives the other portion or half of the flanges of the I-beam spline, as the wall-to-floor transition panel is connected to the first standard panel of the floor.

[0024] Differences necessary to accommodate any desired wall height (which may not be a multiple of the standard panel height (e.g., 2 feet) can be accommodated by adjusting the height of the wall-to-floor transition panel, and/or by adjusting the height of the wall leg of the wall-to-roof transition panel. It will be apparent that a wall is formed by a wall-to-floor transition panel (at the bottom of the wall), any desired number of standard panels stacked one on top of another, capped by a wall-to-roof transition panel (at the top of the wall). Between each panel is the I-beam or other spline, connecting the adjacent panels, for example, with the bottom portion of the flanges (below the web) of the I-beam in the channels of the lower panel, and the top portion of the flanges (above the web) of the I-beam in the channels of the upper panel (i.e., that panel stacked on top of the lower panel). This same structure is used, whether the adjacent panels are two standard panels adjacent to one another (e.g., in the roof, walls, or floor), or the two adjacent panels are a wall-to-floor transition panel adjacent to a standard panel (at the bottom of the wall), or the two adjacent panels are a wall-to-roof transition panel adjacent to a standard panel (at the top of the wall).

[0025] The above described wall-to-floor transition panel may be L-shaped. A T-shaped wall-to-floor transition panel is also possible, e.g., for use in constructions where a transition from a lower floor to an upper floor is desired. Such a T-shaped wall-to-floor transition panel may include two wall legs (e.g., each 180° apart), with a floor leg therebetween (e.g., at 90° relative to the wall legs). Each of the wall legs and the floor leg may similarly include the described channels, to allow such legs to be mated to adjacent standard panels (forming the lower story wall, the upper story wall, and the upper floor).

[0026] It will be apparent that methods of construction may involve (i) providing a frame that defines an overall shape for the building; (ii) installing a spline so as to span between two frame members of the framed (e.g., using ear brackets to extend the length of the spline); (iii) installing a wall-to-floor transition panel between the two frame members, with the spline of (ii) at least partially engaged in a channel of the wall-to- floor transition panel; (iv) installing a standard modular panel adjacent the wall-to-floor transition panel of (iii), with at least a portion of the spline of (ii) engaged in a channel of the standard modular panel, so that the spline of (ii) joins the wall-to-floor transition panel with the adjacent standard modular panel, with the spline of (ii) engaged in opposed facing channels of the wall-to-floor transition panel and the standard modular panel; (v) installing another of the plurality of splines in another channel on an opposite end of the standard modular panel of (iv), followed by installation of any number of a series of additional standard modular panels and splines, until reaching another transition, from wall-to-floor, where another wall-to-floor transition panel is installed; (vi) installing a spline into a top channel of the wall-to-floor transition panel of (v); (vii) installing any number of a series of additional standard modular panels and splines to form a wall, until reaching another transition, from wall-to-roof, where a wall-to-roof transition panel is installed, the wall-to-roof transition panel dictating a roof pitch and shape and length of an eave associated with the roof of the building; and (viii) installing a spline in a roof leg of the wall-to-roof transition panel, and installing any number of a series of additional standard modular panels and splines to form a roof.

[0027] Where the roof is a pitched roof (e.g., not a flat roof, at 90° to the wall), a roof cap transition panel may also be employed, at the apex of such a pitched roof, with the roof cap transition panel at the apex, with standard panels on either side thereof, sloping downward, with the same spline-panel-spline arrangement as any of the other panels. While the steps are identified above with roman numerals, it will be appreciated that the steps may be performed in numerical order, or in another order, if desired.

[0028] Following are some further example embodiments of the invention. These are presented only by way of example and are not intended to limit the scope of the invention in any way. Further, any example embodiment, or individual features thereof, can be combined with one or more of the example embodiments, or individual features thereof.

[0029] Embodiment 1. A method for constructing a building from a frame, a plurality of splines, a plurality of standard modular panels, one or more wall-to-floor transition panels, and one or more wall-to-roof transition panels, the method comprising:

(i) providing the frame that defines an overall shape for the building;

(ii) installing one of the plurality of splines so as to span between two frame members of the frame;

(iii) installing a wall-to-floor transition panel between the two frame members, with the spline of (ii) at least partially engaged in a channel of the wall- to-floor transition panel;

(iv) installing a standard modular panel adjacent the wall-to-floor transition panel of (iii), with at least a portion of the spline of (ii) engaged in a channel of the standard modular panel, so that the spline of (ii) joins the wall-to- floor transition panel with the adjacent standard modular panel, with the spline of (ii) engaged in opposed facing channels of the wall-to-floor transition panel and the standard modular panel;

(v) installing another of the plurality of splines in another channel on an opposite end of the standard modular panel of (iv), followed by installation of any number of a series of additional standard modular panels and splines, until reaching another transition, from wall-to-floor, where another wall-to-floor transition panel is installed;

(vi) installing a spline into a top channel of the wall-to-floor transition panel of (v);

(vii) installing any number of a series of additional standard modular panels and splines to form a wall, until reaching another transition, from wall-to- roof, where a wall-to-roof transition panel is installed, the wall-to-roof transition panel dictating a roof pitch and shape and length of an eave associated with the roof of the building; and

(viii) installing a spline in a roof leg of the wall-to-roof transition panel, and installing any number of a series of additional standard modular panels and splines to form a roof. [0030] Embodiment 2. A method as recited in embodiment 1, wherein the roof is pitched, step (viii) comprising installing any number of a series of additional standard modular panels and splines to form a portion of roof until reaching an apex of the roof, at which apex a roof cap transition panel is installed, joined to standard modular panels on either side thereof with splines therebetween.

[0031] Embodiment 3. A method as recited in any of embodiments 1-2, wherein the building being constructed includes at least two stories, and wherein at least one of the wall-to-floor transition panels is T-shaped, including two wall legs and a floor leg, to provide a transition from a floor of an upper story to both a lower story wall and to an upper story wall.

[0032] Embodiment 4. A method as recited in any of embodiments 1-3, wherein the wall-to-roof transition panel includes the roof leg and a vertical wall leg, the roof leg being at an angle relative to the vertical wall leg that corresponds to the roof pitch of the roof.

[0033] Embodiment 5. A method as recited in embodiment 4, wherein a height of the vertical wall leg can be selected to accommodate a desired wall height for the wall which it forms a top portion of.

[0034] Embodiment 6. A method as recited in any of embodiments 1-5, further comprising:

(i) wherein the standard panels are attached to members of the exterior frame by ear bracket portions of the splines, the splines extending horizontally through channels formed in each of the standard panels; or

(ii) wherein the splines extend horizontally through channels formed in each of the standard panels, flanges of the splines being attached to members of the exterior frame by ear bracket flange portions of the exterior frame.

[0035] Embodiment 7. A method as recited in any of embodiments 1-6, wherein the splines comprise I-beams which extend horizontally between adjacent panels.

[0036] Embodiment 8. A method as recited in any of embodiments 1-7, wherein the steps (i) through (viii) are performed in numerical order.

[0037] Embodiment 9. A method as recited in any of embodiments 1-8, wherein each standard panel and the wall-to-roof transition panel each comprises a pair of channels extending horizontally through a length of each panel, configured to receive a portion of a flange of an I-beam spline that is positioned between said panel and a corresponding adjacent panel.

[0038] Embodiment 10. A method as recited in any of embodiments 1-9, wherein the wall-to-roof transition panel further includes a furring slot for insertion of a stiffening member.

[0039] Embodiment 11. A method as recited in embodiment 10, wherein the slot for insertion of a stiffening member is a C-shaped, I-shaped, H-shaped, or L-shaped slot, running horizontally, parallel to a free eave end of the wall-to-roof transition panel.

[0040] Embodiment 12. A method as recited in any of embodiments 1-11, wherein a length of the roof leg can be selected to accommodate a desired roof length for the roof which it forms a portion of.

[0041] Embodiment 13. A method for constructing a building from a frame, a plurality of splines, a plurality of standard modular panels, one or more wall-to-floor transition panels, and one or more wall-to-roof transition panels, the method comprising:

(i) providing the frame that defines an overall shape for the building;

(ii) installing one of the plurality of splines so as to span between two frame members of the frame;

(iii) installing a wall-to-floor transition panel between the two frame members, with a portion of the spline of (ii) engaged in a bottom channel of the wall-to-floor transition panel;

(iv) installing a standard modular panel adjacent the wall-to-floor transition panel of (iii), with a portion of the spline of (ii) engaged in a channel of the standard modular panel, another portion of the spline of (ii) engaged in the bottom channel of the wall-to-floor transition panel, so that the spline of (ii) joins the wall-to-floor transition panel with the adjacent standard modular panel, with the spline of (ii) engaged in opposed facing channels of the wall-to-floor transition panel and the standard modular panel;

(v) installing another of the plurality of splines in another channel on an opposite end of the standard modular panel of (iv), followed by installation of any number of a series of additional standard modular panels and splines, until reaching another transition, from wall-to-floor, where another wall-to-floor transition panel is installed, the series of additional standard modular panels and splines of (v) forming a floor of the building; (vi) installing a spline into a top channel of the wall-to-floor transition panel of (v);

(vii) installing any number of a series of additional standard modular panels and splines to form a wall, until reaching another transition, from wall-to- roof, where a wall-to-roof transition panel is installed, the wall-to-roof transition panel dictating a roof pitch and shape and length of an eave associated with the roof of the building; and

(viii) installing a spline in a roof leg of the wall-to-roof transition panel, and installing any number of a series of additional standard modular panels and splines to form a roof.

[0042] Embodiment 14. A method as recited in embodiment 13, wherein the roof is pitched, step (viii) comprising installing any number of a series of additional standard modular panels and splines to form a portion of roof until reaching an apex of the roof, at which apex a roof cap transition panel is installed, joined to standard modular panels on either side thereof, with splines therebetween.

[0043] Embodiment 15. A method as recited in any of embodiments 13-14, wherein the wall-to-roof transition panel includes the roof leg and a vertical wall leg, the roof leg being at an angle relative to the vertical wall leg that corresponds to the roof pitch of the roof.

[0044] Embodiment 16. A method as recited in embodiment 15, wherein a height of the vertical wall leg can be selected to accommodate a desired wall height for the wall which it forms a top portion of.

[0045] Embodiment 17. A method as recited in any of embodiments 13-16, further comprising:

(i) attaching a plurality of ear brackets between the splines and the frame, where the splines extend horizontally through channels formed in each of the panels, the ear brackets connecting the splines to the frame; or

(ii) attaching the splines to the frame via ear bracket flange portions of the frame, where the splines extend horizontally through channels formed in each of the panels, the ear bracket flange portions of the frame connecting the frame to the splines.

[0046] Embodiment 18 method as recited in any of embodiments 13-17, wherein the splines comprise I-beams. [0047] Embodiment 19. A method as recited in any of embodiments 13-18, wherein each standard panel and each transition panel comprises a pair of channels extending horizontally through a length of such panel, configured to receive a portion of a flange of the spline, the splines being in the form of an I-beam that is positioned between adjacent panels.

[0048] Embodiment 20. A method as recited in any of embodiments 13-19, wherein the wall-to-roof transition panel further includes a furring slot for insertion of a stiffening member.

[0049] Embodiment 21. A method as recited in any of embodiments 13-20, wherein a length of the roof leg is selected to accommodate a desired roof length for the roof which it forms a portion of.

[0050] Embodiment 22. A building system comprising: a plurality of standard panels, the standard panels forming walls, a roof, and a floor of the building; a wall-to-roof transition panel positioned between one of the standard panels of the roof, and one of the standard panels of one of the walls; wherein the transition panel dictates a roof pitch and shape and length of an eave associated with the roof.

[0051] Embodiment 23. A building system as recited in embodiment 22, wherein the wall-to-roof transition panel includes a roof leg and a vertical wall leg, the roof leg being at an angle relative to the vertical wall leg that corresponds to the roof pitch of the roof. [0052] Embodiment 24. A building system as recited in embodiment 23, wherein a height of the vertical wall leg can be selected to accommodate a desired wall height for the wall which it forms a top portion of.

[0053] Embodiment 25. A building system as recited in any of embodiments 22-24, wherein the building system further comprises an exterior frame comprising vertical posts to which the standard panels and transition panels are attached.

[0054] Embodiment 26. A building system as recited in embodiment 25, wherein the standard panels of the walls are attached to the vertical posts, the exterior frame further comprising horizontal beams to which the standard panels of the floor are attached, the exterior frame further comprising truss members to which the standard panels of the roof are attached. [0055] Embodiment 27. A building system as recited in any of embodiments 25-26, wherein the standard panels are attached to members of the exterior frame by ear brackets attached to elongate splines extending horizontally through channels formed in each of the standard panels.

[0056] Embodiment 28. A building system as recited in embodiment 27, wherein the elongate splines extending horizontally through the channels comprise I-beams.

[0057] Embodiment 29. A building system as recited in any of embodiments 22-28, wherein elongate splines in the form of I-beams are provided extending horizontally between each of the standard panels.

[0058] Embodiment 30. A building system as recited in any of embodiments 22-29, wherein elongate splines in the form of I-beams are provided extending horizontally between the wall-to-roof transition panel and the adjacent standard panel of the roof, and between the wall-to-roof transition panel and the adjacent standard panel of the wall. [0059] Embodiment 31. A building system as recited in any of embodiments 22-30, wherein each standard panel and the wall-to-roof transition panel each comprises a pair of channels extending horizontally through a length of each panel, configured to receive a portion of a flange of an I-beam spline that is positioned between said panel and a corresponding adjacent panel.

[0060] Embodiment 32. A building system as recited in any of embodiments 22-31, wherein each standard panel comprises: a lightweight body; a plurality of channels extending horizontally through a length of the panel, each channel being configured to receive an elongate spline therein, wherein each elongate spline once received in the channel is at least partially disposed within the lightweight body, without the spline being exposed on an outside major planar face of the lightweight body, so that the elongate spline is restrained once received within the channel.

[0061] Embodiment 33. A building system as recited in any of embodiments 22-32, wherein the wall-to-roof transition panel accommodates an increased height to the wall, by including a vertical length to a wall leg of the transition panel adjacent to the wall, that adds to the wall height. [0062] Embodiment 34. A building system as recited in any of embodiments 22-33, wherein the wall-to-roof transition panel accommodates an increased length to the roof, by including a roof leg having a selected length that adds to the length of the roof.

[0063] Embodiment 35. A building system as recited in any of embodiments 22-34, wherein the wall-to-roof transition panel further includes a slot for insertion of an eave stiffening member.

[0064] Embodiment 36. A building system as recited in embodiment 35, wherein the slot for insertion of an eave stiffening member is a C-shaped, I-shaped, H-shaped, or L- shaped slot, running horizontally, parallel to a free eave end of the wall-to-roof transition panel.

[0065] Embodiment 37. A building system comprising: a plurality of standard panels, the standard panels forming walls, a roof, and a floor of the building; the building system further comprising at least one of (i) or (ii) below:

(i) a wall-to-roof transition panel positioned between one of the standard panels of the roof, and one of the standard panels of one of the walls, wherein the transition panel dictates a roof pitch associated with the roof;

(ii) a wall-to-floor transition panel positioned between one of the standard panels of the floor, and one of the standard panels of one of the walls.

[0066] Embodiment 38. A building system as recited in embodiment 37, wherein the building system comprises both the wall-to-roof transition panel of (i) and the wall-to- floor transition panel of (ii).

[0067] Embodiment 39. A building system as recited in any of embodiments 37-38, wherein the building system comprises the wall-to roof transition panel, the wall-to-roof transition panel including an angled roof leg and a vertical wall leg, the angled roof leg being at an angle relative to the vertical wall leg that corresponds to the roof pitch of the roof.

[0068] Embodiment 40. A building system as recited in embodiment 39, wherein a height of the vertical wall leg can be selected to accommodate a desired wall height for the wall which it forms a top portion of.

[0069] Embodiment 41. A building system as recited in any of embodiments 39-40, wherein a length of the roof leg can be selected to accommodate a desired roof length for the roof which it forms a portion of. [0070] Embodiment 42. A modular panel for use in constructing a wall of a building, the modular panel comprising: a body; a plurality of channels extending horizontally through a length of the panel, the plurality of channels including two top channels and two bottom channels, each channel being configured to receive an elongate spline therein, wherein each elongate spline once received in the channel is disposed horizontally within the body, without the elongate spline being exposed on an outside face of the body, so that the elongate spline is restrained once received within the channel, wherein the panel includes a cross-sectional geometry that is consistent across the length of the panel, with the top and bottom channels running length-wise through the panel, without any channels or splines running vertically through the panel, so that the panel can be formed by extrusion; and wherein top and bottom outer edges of the panel include a stair stepped or inclined configuration, so that when stacking one panel atop another panel, a horizontal seam therebetween is defined by an inclined or stair-stepped surface interior to the horizontal seam, so as to minimize or prevent water seepage between stacked panels.

[0071] Embodiment 43. A panel as recited in embodiment 42, wherein the two top channels are substantially parallel to one another, and the two bottom channels are substantially parallel to one another.

[0072] Embodiment 44. A panel as recited in any of embodiments 42-43, wherein the body comprises foam, the foam body further comprising: a first pre-cut slot in a first face of the panel; a second pre-cut slot in a second, opposite face of the panel; the first pre-cut slot being centered on a respective furring channel associated with the first face of the panel, the first pre-cut slot extending through the first face into the furring channel associated with the first face of the panel; and the second pre-cut slot being centered on a respective furring channel associated with the second face of the panel, the second pre-cut slot extending through the second face into the furring channel associated with the second face of the panel. [0073] Embodiment 45. A panel as recited in any of embodiments 42-44, wherein the body is formed as an integral single piece of foam material, or as two initially separate halves, each half including one face, where the two separate halves are glued or otherwise attached together.

[0074] Embodiment 46. A wall system built from a plurality of modular panels and a plurality of splines, the wall system comprising: a plurality of modular panels, each modular panel comprising: a body; and a plurality of channels extending horizontally through a length of the panel, each channel being configured to receive an elongate spline therein, wherein each elongate spline once received in the channel is disposed within the body, without the elongate spline being exposed on an outside face of the body, so that the elongate spline is restrained once received within the channel; and a plurality of elongate splines, wherein the splines are received within the channels of the bodies of the modular panels, the splines forming flanges of an I- beam that runs horizontally along a top or bottom of the modular panel; wherein the wall system is a post and beam type construction, and wherein the modular panels are oriented so that the channels and splines run horizontally and splines extend beyond panels to integrate with an adjacent post positioned between two adjacent side-by-side modular panels.

[0075] Embodiment 47. A wall system as recited in embodiment 46, wherein the splines disposed in the channels are not exposed on an outside face of the body, such that each spline has only 1 degree of freedom, along the length of the channel.

[0076] Embodiment 48. A wall system as recited in any of embodiments 46-47, wherein the splines are connected to the post by a lap joint.

[0077] Embodiment 49. A modular panel for use in constructing a building, the modular panel comprising: a foam body that is generally rectangular in shape; a first top channel extending horizontally through a length of the foam body, the first top channel being off-center relative to a thickness of the foam body, positioned towards a first face of the foam body; a second top channel extending horizontally through the length of the foam body, the second top channel being off center relative to the thickness of the foam body, positioned towards a second face of the foam body; a first bottom channel extending horizontally through the length of the foam body, the first bottom channel being aligned with and below the first top channel; a second bottom channel extending horizontally through the length of the foam body, the second bottom channel being aligned with and below the second top channel; wherein each of the top and bottom channels are exposed and open at top and bottom edges of the foam body, respectively, each of the top and bottom channels being rectangular in transverse cross-section, with a length of the transverse cross-section rectangle being oriented vertically, each top and bottom channel being configured to receive an elongate spline therein which is flexible in a direction that is normal to a width of the elongate spline; a web center portion of an I-beam member positioned on the top edge of the foam body, so as to be positioned between splines positioned in the top channels, forming an I-beam at the top edge of the foam body, where the splines in the top channels form the end flanges of the I-beam and the web center portion forms the web of the I-beam on the top edge of the foam body; and a web center portion of an I-beam member positioned on the bottom edge of the foam body, so as to be positioned between splines positioned in the bottom channels, forming an I-beam at the bottom edge of the foam body, where the splines in the bottom channels form the end flanges of the I-beam and the web center portion forms the web of the I-beam on the bottom edge of the foam body; wherein the panel includes a cross-sectional geometry that is consistent across the length of the panel, with the top and bottom channels running length wise through the panel, without any recesses, channels or splines in the panel running cross-wise through the panel, so that the panel can be formed by extrusion.

[0078] Embodiment 50. A panel as recited in embodiment 49, wherein the panel further comprises: a first interior channel extending horizontally through the length of the foam body, the first interior channel being positioned off-center relative to the thickness of the foam body, positioned towards a first face of the foam body, aligned with the top and bottom first channels; a second interior channel extending horizontally through the length of the foam body, the second interior channel being positioned off-center relative to the thickness of the foam body, positioned towards a second, opposite face of the foam body, aligned with the top and bottom second channels.

[0079] Embodiment 51. A panel as recited in embodiment 50, each interior channel being configured to receive an elongate spline therein which is flexible in a direction that is normal to a width of the elongate spline, wherein each elongate spline once received in the respective interior channel is disposed within the foam body, without the elongate spline being exposed on an outside face of the foam body associated with the respective channel, so that the elongate splines are restrained in all directions other than being able to slide within the channel within which the spline is received.

[0080] Embodiment 52. A panel as recited in any of embodiments 50-51, further comprising: a first pre-cut slot in the first face of the panel; a second pre-cut slot in the second, opposite face of the panel; the first pre-cut slot being centered on the first interior channel associated with the first face of the panel, the first pre-cut slot extending through the first face into the first interior channel; and the second pre-cut slot being centered on the second interior channel associated with the second face of the panel, the second pre-cut slot extending through the second face into the second interior channel.

[0081] Embodiment 53. A panel as recited in any of embodiments 49-52, wherein the foam body is formed as an integral single piece of material, or as two initially separate halves, each half including one face, where the two separate halves are glued or otherwise attached together.

[0082] Embodiment 54. A transition panel for use in transitioning from a wall to a roof in a building construction, the transition panel being positioned: between a stack of standard modular building panels forming a wall; and one or more standard modular roof panels forming a roof structure, wherein the standard modular building panels of the wall are substantially identical to the standard modular roof panels of the roof structure; wherein the transition panel comprises a roof leg and a wall leg, which are at an angle relative to one another, a vertical length of the wall leg accommodating an increased height to the wall by including a vertical length that adds to the wall height, the angle between the roof leg and the wall leg dictating a roof pitch associated with the roof; wherein the roof leg and the wall leg each include pairs of channels, into which flanges of an I-beam are selectively positioned.

[0083] Embodiment 55. A transition panel as recited in embodiment 54, wherein the transition panel connects to a panel according to any of embodiments 49-53 used in forming the wall, and another panel according to any of embodiments 49-53 used in forming the roof.

[0084] Embodiment 56. A transition panel as recited in any of embodiments 54-55, wherein the transition panel further includes one or more slots for insertion of eave stiffening members.

[0085] Embodiment 57. A panel as recited in any of embodiments 42-45, wherein substantially an entirety of the outside face of the body is planar, without any recessed channels formed therein, so that a wall surface defined by the outside face of the panel body is formed entirely by the body, rather than any splines positioned within channels formed in the outside face of the panel body.

[0086] Embodiment 58. A panel as recited in any of embodiments 42-45, wherein the panel is formed by extrusion.

[0087] Embodiment 59. A transition panel as recited in any of embodiments 54-56, wherein the standard modular building panels and the standard modular roof panels are generally shaped as rectangular prisms.

[0088] Embodiment 60. A transition panel as recited in any of embodiments 54-56, wherein the channels of the transition panel have the same cross-sectional shape as channels formed in the standard modular building panels of the wall and the standard modular roof panels of the roof structure, such that all such channels can receive the flanges of the I-beam. [0089] Embodiment 61. A transition panel for use in transitioning from a wall to a roof in a building construction, the transition panel being positioned: between a stack of standard modular building panels forming a wall; and one or more standard modular roof panels forming a roof structure; wherein the transition panel dictates a roof pitch associated with the roof; wherein the transition panel connects to a standard modular building panel used in forming the wall, and another standard modular building panel used in forming the roof, wherein each standard modular building panel comprises: a foam body that is generally rectangular in shape; a first top channel extending horizontally through a length of the foam body, the first top channel being off-center relative to a thickness of the foam body, positioned towards a first face of the foam body; a second top channel extending horizontally through the length of the foam body, the second top channel being off center relative to the thickness of the foam body, positioned towards a second face of the foam body; a first bottom channel extending horizontally through the length of the foam body, the first bottom channel being aligned with and below the first top channel; a second bottom channel extending horizontally through the length of the foam body, the second bottom channel being aligned with and below the second top channel; wherein each of the top and bottom channels are exposed and open at top and bottom edges of the foam body, respectively, each of the top and bottom channels being rectangular in transverse cross-section, with a length of the transverse cross-section rectangle being oriented vertically, each top and bottom channel being configured to receive an elongate spline therein; a web center portion of an I-beam member positioned on the top edge of the foam body, so as to be positioned between splines positioned in the top channels, forming an I-beam at the top edge of the foam body, where the splines in the top channels form the end flanges of the I-beam and the web center portion forms the web of the I-beam on the top edge of the foam body; and a web center portion of an I-beam member positioned on the bottom edge of the foam body, so as to be positioned between splines positioned in the bottom channels, forming an I-beam at the bottom edge of the foam body, where the splines in the bottom channels form the end flanges of the I-beam and the web center portion forms the web of the I-beam on the bottom edge of the foam body. [0090] Embodiment 62. A transition panel as recited in embodiment 61, wherein the flanges and web of each I-beam are pre-assembled to form the I-beam.

[0091] Embodiment 63. A transition panel as recited in any of embodiments 61-62, wherein the flanges and web of each I-beam are assembled in-situ.

[0092] Embodiment 64. A wall system built from a plurality of modular panels and a plurality of splines, the wall system comprising: a plurality of modular panels, each modular panel comprising: a body; and a plurality of channels extending horizontally through a length of the panel, each channel being configured to receive an elongate spline therein, wherein each elongate spline once received in the channel is disposed within the body, without the elongate spline being exposed on an outside face of the body, so that the elongate spline is restrained once received within the channel; and a plurality of elongate splines, wherein the splines are received within the channels of the bodies of the modular panels, the splines forming flanges of a flange-web-flange member that runs horizontally along a top or bottom of the modular panel; wherein the wall system is a post and beam type construction, and wherein the modular panels are oriented so that the channels and splines run horizontally and splines extend beyond panels to integrate with an adjacent post. [0093] Features from any of the disclosed embodiments may be used in combination with one another, without limitation. In addition, other features and advantages of the present disclosure will become apparent to those of ordinary skill in the art through consideration of the following detailed description and the accompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS

[0094] To further clarify the above and other advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is appreciated that these drawings depict only illustrated embodiments of the invention and are therefore not to be considered limiting of its scope. The drawings illustrate several embodiments of the invention, wherein identical reference numerals refer to identical or similar elements or features in different views or embodiments shown in the drawings. [0095] Figure 1 is a top perspective view of an exemplary modular panel as described herein.

[0096] Figure 2 is an end view of the modular panel of Figure 1.

[0097] Figure 3 is a bottom perspective view of the modular panel of Figure 1.

[0098] Figure 4 is a perspective view showing a vertical post against which the modular panel can be positioned and attached to, as well as a bottom plate and bottom flange splines, for reception into a first layer of placed modular panels.

[0099] Figure 5 is a perspective view showing the vertical post, bottom plate and bottom flange splines of Figure 4, with a modular panel positioned over the bottom plate, with the splines inserted into the bottom channels of the modular panel.

[0100] Figure 6 is a progression from Figure 5, showing placement of another panel on the opposite side of the post, showing how the various splines may span across both modular panels, sandwiching the post between the splines, and also showing splines positioned to form an I-beam formed from components placed into the top channels, and over the top of the modular panel. In another embodiment where the spline extends beyond the end of the panel, this may be accomplished with an ear bracket, spanning between the portion of the flange in the panel, and the post.

[0101] Figure 7 is a progression from Figure 6, showing placement of an additional stack of panels over the first layer of panels, with an in-situ formed I-beam constructed on site, therebetween.

[0102] Figure 8 is a progression from Figure 7, showing a foam filler member installed over the vertical post, creating a flush surface across the panels on either side of the post. [0103] Figure 9 shows a wall constructed similar to that of Figure 8, further showing how the same panels may be use for a roof, positioned between truss members.

[0104] Figure 10 shows how an opening, e.g., for a door or window, may be provided for in the post and beam construction systems including the modular panels of the present invention.

[0105] Figure 11 shows how transition panels may be provided for connecting the panels used in a wall structure (e.g., such as that of Figure 8) to the same standard panels used to form a roof structure. [0106] Figure 12A shows a close up of the wall-to-roof transition panel of Figure 11, between the top most panel of the wall structure and the adjacent roof panel.

[0107] Figure 12B shows a close up of the floor panel of Figure 11.

[0108] Figures 13-28 illustrate another progressive construction according to an exemplary building system according to the present invention.

[0109] Figure 13 shows several transition panels, including a roof cap transition panel for transitioning from one side of a pitched roof apex to the other side; a wall-to-roof transition panel for transitioning from a wall to a roof; and a wall-to-floor transition panel for transitioning from a wall to a floor. A spline configured as an I-beam is also shown, e.g., for positioning between each given pair of panels (whether standard panel to standard panel, or standard panel to transition panel).

[0110] Figure 13 A shows another embodiment of a wall-to-floor transition panel, configured for use in transitioning to an upper story, from a lower story.

[0111] Figure 14 illustrates a frame of the building system supported on pier footings. [0112] Figure 15 shows attachment of a spline between horizontal frame members (using ear brackets of the spline, or ear brackets attached to the spline), and positioning of the wall-to-floor transition panel for attachment to such spline.

[0113] Figure 16 is similar to Figure 15, after the flanges of the I-beam spline have been received into the corresponding slots of the wall-to-floor transition panel.

[0114] Figure 17 shows positioning of a standard panel, as the first floor panel, positioned adjacent to the wall-to-floor transition panel, with the I-beam spline between the two panels (with flanges on either side of the I-beam received into slots of each of the corresponding panels).

[0115] Figure 18 illustrates construction of the remainder of the floor, with standard panels, coupled together by splines between each adjacent pair of panels, with the splines attached by ear brackets to the horizontal frame members.

[0116] Figure 19 shows another wall-to-floor transition panel being positioned at the opposite end of the floor, for transitioning to a wall.

[0117] Figure 20 shows the same configuration as Figure 19, with the wall-to-floor transition panel now in place.

[0118] Figure 21 shows an I-beam spline positioned into the top channels of the wall-to- floor transition panel, in preparation for placement of a standard panel thereover, for construction of the wall. [0119] Figure 22 shows a top standard panel of the wall in place, at the top portion of the wall, with a wall-to-roof transition panel being positioned for placement thereover, for providing a transition from the wall to the roof. In Figure 22, a spline is being inserted into a furring channel in the free eave end of the eave portion of the wall-to-roof transition panel.

[0120] Figure 23 is similar to Figure 22, with the spline now inserted into the furring slot of the eave portion of the transition panel, showing the transition panel ready for positioning over the top standard panel (and its accompanying spline) of the wall, for providing a transition from the wall to the roof.

[0121] Figure 24 is similar to Figure 23, but shows the wall-to-roof transition panel now in place, with its wall leg (e.g., vertical wall leg) coupled by the spline, to the top-most standard panel of the wall.

[0122] Figure 25 shows both sides of the pitched roof having been constructed with standard panels, joined together by I-beam splines (with the splines attached to the truss members of the frame, by ear brackets), ready for capping of the apex by the roof cap transition panel.

[0123] Figure 26 shows one side of the roof cap transition panel positioned for mating with one side of the pitched roof structure, with the opposite side ready for rotation downward, for mating with the other side of the pitched roof structure.

[0124] Figure 27 shows the apex of the roof, after the roof cap transition panel is in place, forming the roof apex, joining together the standard panels that form either side of the pitched roof.

[0125] Figure 28 shows the completed building construction.

[0126] Figure 29 shows an alternative connection between the spline and frame member, according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS I. Definitions

[0127] Some ranges may be disclosed herein. Additional ranges may be defined between any values disclosed herein as being exemplar _} - of a particular parameter. All such ranges are contemplated and within the scope of the present disclosure.

[0128] Numbers, percentages, ratios, or other values stated herein may include that value, and also other values that are about or approximately the stated value, as would be appreciated by one of ordinary skill in the art. A stated value should therefore be interpreted broadly enough to encompass values that are at least close enough to the stated value to perform a desired function or achieve a desired result, and/or values that round to the stated value. The stated values for example thus include values that are within 10%, within 5%, within 1%, etc. of a stated value.

[0129] All numbers used in the specification and claims are to be understood as being modified in all instances by the term “about”, unless otherwise indicated. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the subject matter presented herein are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements.

[0130] It must be noted that, as used in this specification and the appended claims, the singular forms “a,” “an” and “the” include plural referents unless the content clearly dictates otherwise.

[0131] Any directions or reference frames in the description are merely relative directions (or movements). For example, any references to “top”, “bottom”, “up” “down”, “above”, “below” or the like are merely descriptive of the relative position or movement of the related elements as shown, and it will be understood that these may change as the structure is rotated, moved, the perspective changes, etc.

[0132] All publications, patents and patent applications cited herein, whether supra or infra, are hereby incorporated by reference in their entirety to the same extent as if each individual publication, patent or patent application was specifically and individually indicated to be incorporated by reference.

II. Introduction

[0133] In one embodiment, the present invention is directed to modular building methods and systems where the building is constructed using lightweight foam modular panels in which the panels include one or more horizontal channels formed through the length of the lightweight foam body of the panel, and in which the panel is of a geometry where the cross-section is consistent, across its entire length (i.e., a geometry that could be extruded). The channels are configured to receive elongate splines, which may simply be flexible strips of OSB, plywood, aluminum, or the like. It will be appreciated that such splines do not necessary need to be formed of wood, such that metal splines, or even other materials (e.g., plastic, or otherwise) could be used. The splines and associated channels into which they are received are configured so that the splines are not exposed on an outside face of the lightweight body (at least once the construction is finished, if not before), but so that the spline is restrained in the wall (e.g., it can only slide in and out of the channel once placed - with 1 degree of freedom).

[0134] The channels may be configured to provide an interior horizontally positioned I- beam or other geometry beam in a wall (or floor or roof) constructed with such panels, where each horizontal I-beam is positioned between adjacent panels (e.g., vertically stacked panels in the case of a wall). The flanges and web of each I-beam may be formed from individual flexible elongate splines, such that the I-beam is not prefabricated, but is actually assembled in-situ, at the construction site, as the panels are positioned to build the wall structure. Of course, in another embodiment, the I-beam spline may be prefabricated, e.g., as shown in Figures 13-28. The horizontal I-beams may form part of a post and beam wall system, which the building system is particularly suited for. For example, the modular panels may be positioned between appropriately spaced apart vertical post members, while the horizontal I-beams run horizontally, between vertically stacked modular panels (i.e., along the wall’s length). Where the panels are used for a floor, they may similarly be positioned adjacent one another (with the I-beam or other spline therebetween), with the panels positioned between appropriately spaced frame members. The frame may provide the overall shape of the building, and may actually bear substantially the full load, such that the panels of the walls are not necessarily load bearing. The roof may be similarly constructed from adjacent placed panels, with splines between each pair of panels.

[0135] The panels may include channels for additional horizontal splines, beyond those that accommodate the I-beams. For example, the panels may include top and bottom channels which receive splines, which may become or be the flanges of the I-beam. The panels may also include one or more interior channels (i.e., furring slots), e.g., positioned off-center relative to a thickness of the foam panel, towards the first and opposite second faces of the panel (which faces correspond to the inside and outside of a constructed wall structure). Such interior splines may serve as furring strips, for attachment points for nails, screws or the like, e.g., for sheathing or other material positioned over the wall, floor, or ceiling, away from the panel’s top and bottom edges. In an embodiment, the standard panels used in constructing the walls, floor, and roof may not include any such furring slots, but such furring slots may be provided in one or more of the various types of transition panels (e.g., wall-to-floor transition panel, wall-to-roof transition panel or roof cap transition panel).

[0136] The modular panels may have a thickness (e.g., foam thickness) that is typically greater than 4 inches, e.g., 5.5 inches, (the same width as a 2x6) or 7.25 inches (the same width as a 2x8). Because the panels include a cross-sectional geometry that is consistent across the length of the panel, they provide excellent flexibility in constructing any desired wall structure or building. For example, the foam panels may easily be cut off at whatever appropriate length, where the wall ends, or where a door, window or other opening is needed, in the horizontal direction of the wall. The vertical direction of the wall is easily formed by simply stacking a desired number of the panels on top of one another, forming the in-situ formed I-beams between each pair of stacked panels. Where desired, the top of a top-most panel could also be cut off, to accommodate an overall desired wall height, or the top-most standard wall panel may be topped with a transition panel (e.g., an upper story wall-to-floor transition panel or a wall-to-roof transition panel) as described herein that is configured to connect the wall panels to roof panels (in the case of a wall-to-roof transition panel) or to connect the wall panel to floor panels and wall panels of an upper story (in the case of a upper story wall-to-floor transition panel). Such a transition panel may include one or more wall portions (e.g., wall leg(s)) that engages with the top-most wall panel, making up any desired additional wall height, allowing a user to accommodate any desired wall height. The wall-to-roof transition panel also includes a roof portion (e.g., roof leg) that similarly engages with the adjacent standard roof panel. The roof leg can be configured to have a desired length, to accommodate any desired roof length (e.g., where the length of the roof is not divisible into a whole number of standard panels (e.g., each 2 feet). An upper story wall-to-floor transition panel can be T-shaped, including two wall legs (one for the lower story wall, one for the upper story wall, and a floor leg), therebetween.

[0137] The modular panels can be formed on a CNC hot wire cutting device, where all necessary deep cuts are formed (as it can be difficult to accurately cut foam material thicker than about 2 inches without such a device). Because the panels are formed under such conditions, during manufacture, high precision and accuracy are possible (which may not be practical to achieve on a job site). Furthermore, by cutting the panels on such a CNC device, the rectangular panels themselves can be formed to very high precision and accuracy dimensions. For example, a 2 foot by 4 foot, or 2 foot by 8 foot panel, 5.5 or 7.25 inches thick will be perfectly “square” and plumb, allowing the panel itself to be used as a square, level, or jig. This characteristic greatly reduces the need for skilled labor, as the panel itself serves as a template (i.e., no tape measure or square is needed). This helps to ensure a robust composite structure having the proper geometry (e.g., right angled walls where such is desired, level floors, level ceilings, and the like).

[0138] The present methods and systems of assembly allow for relatively open source construction, with a relatively high degree of customizability to the building being constructed, all achievable at lower cost and/or time as compared to existing methods of construction. Furthermore, even with such relative flexibility, little if any skilled labor is required. For example, a model or blueprint image of the building to be constructed could simply be provided, with the crew only being required to connect the modules as shown in the model or blueprint (e.g., akin to LEGO instructions).

[0139] It is also advantageous that the foam material (e.g., expanded polystyrene, or other foamed insulative materials) from which the modular panels are constructed may be readily available nearly anywhere, such that the foam panels may be manufactured at a foam production facility near the construction site (minimizing shipping distance and expense). This provides savings and convenience in that the foam panels can be manufactured locally, avoiding the significant expense of shipping foam (which occupies a large volume, even though it weights little). [0140] For example, such foam may typically have a density from about 1 lb/ft ³ to 2 lb/ft ³ , and provide an insulative value of about R4 per inch of foam thickness. A wall constructed using a 5.5 inch or 7.25 inch thick foam panel as described herein may provide an R value of about R25 or R30, respectively.

III. Exemplary Construction Methods and Systems [0141] Figures 1-3 show a modular panel 100 according to the present invention. Such panels can be used in building construction, and advantageously are typically fully compatible with existing building codes and standard construction practices, such that adoption of such a building system would not present the many regulatory and other hurdles associated with various other construction systems that have been proposed, some by the present Applicant.

[0142] Modular panel 100 includes a lightweight body 102. Body 102 may comprise or otherwise be formed from a foam material, such as expanded polystyrene (EPS) foam. Such material may be rigid. Such panels may be precision cut from blocks of rigid, already cured EPS foam. For example, EPS foam is often available as 3x4x8 foot blocks. Such a block may be sufficient to produce several modular panels as shown in Figure 1, which may each measure 2x4 feet (or 2x8 feet), with a thickness of 7.25 inches (width of 2x8 dimensional lumber). While EPS foam may be particularly appropriate, other lightweight materials that can be molded (as the 3x4x8 foot EPS blocks are molded), easily cut using CNC hot wire cutting device, formed by extrusion etc. may also be used. [0143] Each panel 100 includes one or more (e.g., a plurality of) channels 104 extending horizontally through the length of panel 100. In the illustrated configuration, panel 100 includes first and second interior channels 104a, 104b, each of which is positioned off- center relative to the thickness of foam body 102, with channel 104a positioned towards (i.e., closer to) panel face 106a and channel 104b positioned towards panel face 106b (i.e., closer to panel face 106b than the center of the thickness of foam body 102). Panel 100 also includes top and bottom channels, which will be discussed in further detail hereafter. In an embodiment, such a panel may actually not include the interior channels 104a, 104b, but only the top and bottom channels (i.e., the interior channels are optional). Each of channels 104a, 104b is sized and shaped to receive therein a flexible elongate spline, where the channels 104a, 104b are not open at faces 106a and 106b of panel 100, but are only open at left and right ends 108a, 108b of panel 100. In an embodiment, splines 116 are advantageously not dimensional lumber, which although readily available, is notorious for being warped, making it difficult to slide such a spline through any of such channels. Rather, splines may be formed from oriented strand board (“OSB”), plywood, aluminum or another material that is easily inserted into such a channel. The spline may exhibit significant flexibility in the direction of the thickness of such sheet material. Such flexibility is readily apparent when holding such a strip of such sheet material at one end, as the other end will flex significantly downward under the weight of the sheet or strip alone. Such does not occur to the same degree with dimensional lumber, even in the same dimensions, as such dimensional lumber is significantly more rigid. Such OSB or similar spline materials are easily obtained, e.g., by ripping sheets of OSB or the like, which are as readily available as dimensional lumber, but with better flexibility in such direchon, while exhibiting minimal if any warping. Although such OSB strips are a particularly suitable material, it will be apparent that a variety of other wood, plastic, or even metal materials (e.g., aluminum) could alternatively be used for splines. [0144] Channels 104a, 104b within panel 100 have dimensions just slightly larger than those of the elongate spline so as to not bind within the channel, but so as to be freely slidable therein (e.g., a clearance of 1/16 inch or so, as will be apparent to those of skill in the art, may be provided). Figure 1 also illustrates the presence of reduced-size (e.g., half-size) top channels 104a' and 104b' at top end 110a of panel 100, and reduced-size (e.g., half-size) bottom channels 104a" and 104a" at bottom end 110b of panel 100. Such reduced-size (e.g., half-size) channels may be similar to interior channels 104, but are exposed at the top or bottom of the panel (although not exposed at the panel faces 106a, 106b), and may be intended to accommodate splines that run through the reduced-size channel (e.g., half height), and another reduced-size (e.g., half-size) channel of an adjacent panel 100 stacked above or below the illustrated panel, when constructing a wall. Such splines in top and bottom channels 104a', 104b', 104a" and 104b" may form the flanges of an I-beam which is horizontally positioned, between adjacent stacked panels. It will be apparent that geometries other than an I-beam could also be used, although the term “I-beam” is used for simplicity, and can be construed broadly, to include other such possible geometries. As shown in Figures 13-28, rather than using initially separate splines, pre-fabricated I-beams may be employed. Splines within interior channels 104 may not form part of an I-beam, but may serve as furring strips providing excellent attachment points within the panel, e.g., when securing dry wall or other sheathing material over one or both panel faces 106a, 106b. Such splines in interior channels 104 may thus be optional, and may also increase the strength characteristics (e.g., shear) of the resulting wall, where included.

[0145] The channels (particularly top and bottom channels 104a', 104b', 104a" and 104b") which are associated with the internal horizontally extending I-beams that are formed in-situ, as the wall is assembled (or provided installed prefabricated) may be spaced apart from one another to accommodate any particular desired spacing of such I- beams, as dictated by the height of each modular panel. For example, in the illustrated configuration where the panel 100 is 2 feet high, such I-beams will be provided horizontally, 2 feet apart, between adjacent panels. Taller or shorter panels could be provided where it is desired to adjust such spacing. Similarly, the panel length (e.g., 4 or 8 feet) may dictate the spacing of adjacent vertical posts of the frame in the wall, which may be provided between adjacent panels placed side by side (while I-beams are provided between adjacent panels stacked one on top of another). Spacings other than 4 feet (e.g., 8 feet, 12 feet, etc.) for such posts or other frame members, and for the panel length may be possible. Such spacing characteristics are well accepted within the building industry, and compatible with existing building codes, which allows the present panels and systems to be readily accepted and implemented, once made known by Applicant. Importantly, when a spline is received into any of the channels (104a, 104b, 104a', 104b', 104a" or 104b"), the spline is not exposed on either exterior face 106a or 106b of panel 100. Applicant has found that other systems that provide for structural members or other features that are exposed on the exterior of a panel exhibit a “ghosting” problem, in that even once such structures are finished over, because of the different material characteristics underlying drywall or other sheathing associated with such surface exposure at the face during framing, there is a noticeable “ghost” that shows up through paint or other interior or exterior wall finishes that plague such systems. It is thus important that no such spline surface exposure is provided with the present panels. For example, particularly in the standard panels, the full interior and exterior faces 106a, 106b are provided entirely by the material from which the lightweight foam body is formed (e.g., EPS). Even in the wall-to-floor transition panel described in further detail below, even though the I-beam spline is provided exposed on the major planar face of the panel, this portion of the major planar face is covered, adjoining the adjacent standard floor panel in the finished construction, preventing any ghosting problem that might otherwise be associated therewith.

[0146] In addition to “ghosting” issues, exposure of splines on the exterior surface also can result in thermal bridging problems, e.g., particularly where metal sheathing is present (e.g., on a roof or otherwise). By ensuring that the splines are positioned internally, rather than externally exposed, there is less of a problem of thermal bridging through the wall, which increases overall insulative efficiency of the wall, roof, floor, or other building structure constructed therefrom. Where thermal bridging occurs, undesired condensation can often occur in such spots due to a thermal gradient associated with such thermal bridging. The present systems ensure there is a thermal break between such structural spline members and any metal or other sheathing that may eventually be placed over roofs, walls, or the like.

[0147] Furthermore, because the splines are positioned within the panel thickness, with approximately 1 to 2 inches of foam thickness between the spline and the nearest face, building codes do not require that electrical wiring (e.g., 120V) be run within conduit, as there is at least 1.5 inches between the exterior of any sheathing (e.g., ½ inch or 5/8 inch drywall or the like) applied over the panel and such electrical wiring. In addition, as shown in Figure 1, the panel may actually include an internal raceway 136 for receipt of electrical wiring, etc.

[0148] In Figure 1, channels 104a, 104a' and 104a" are all vertically aligned with one another, spaced an equal distance from the face 106a of panel 100. Similarly, channels 104b, 104b' and 104b" are all also vertically aligned with one another, spaced an equal distance from face 106b. Because the channels are not centered in the panel’s thickness, but are offset towards the respective faces, two such channels are provided at a given height, horizontally aligned with one another (e.g., channels 104a and 104b are at the same height, channels 104a" and 104b" are at the same height, and channels 104a' and 104b' are at the same height). While it may be possible to flip the panel 90°, such that the I-beams would run vertically, the illustrated horizontal orientation of the panel (horizontal length greater than vertical height) is particularly advantageous in wall construction, as most variation in wall constructions occurs horizontally, rather than vertically (e.g., most walls are of a given height, with little variation beyond such standard heights). That said, in some constructions, at least some of the panels may be flipped, to be oriented with the length dimension running vertically.

[0149] The channels are offset towards one of the two faces 106a, 106b of the foam body 102, with two channels at each given height (e.g., interior channels 104a, 104b are at a central portion (e.g., the middle) of the height, channels 104a" and 104b" are at the bottom of the panel, and channels 104a' and 104b' are at the top of the panel. Because 2 channels are present at any given height, equally spaced from their respective faces, the same length fasteners can be used to attach sheathing on one face of the panel versus the other face.

[0150] In any case, when attaching such drywall or other sheathing, the present system avoids point loading onto screws, nails, or other fasteners employed, because of the foam thickness (e.g., 1 to 2 inches) between the sheathing and the spline encased within the foam panel. Such avoidance of point loading can be beneficial in an earthquake or the like, which may otherwise cause such fasteners to shear off.

[0151] In addition to the various internal, top and bottom channels described, the illustrated panel 100 further includes a pre-cut slot 112 in face 106a of panel 100, centered relative to channel 104a. Pre-cut slot 112 extends from first face 106a into channel 104a. For example, such a pre-cut slot allows internal formation of channel 104a in body 102 with a CNC controlled hot wire cutter. The width of slot 112 is advantageously very narrow, e.g., rather than providing a wide opening from channel 104a to the area adjacent face 106a. For example, where the height of channel 104a may be just over 3 inches (e.g., to accommodate a 3 inch spline), the width of slot 112 (the width of which is parallel thereto) may be no more than 0.25 inch, or no more than 0.125 inch. Stated another way, the width of slot 112 may be no more than 20% of, 15% of, 10% of, or no more than 5% of the transverse cross-sectional height of channel 104a. On the face 106b, opposite face 106a, there is shown another pre-cut slot 112, identically configured, but with respect to channel 104b and face 106b. The alignment of slots 112 with interior channels 104 is further beneficial once a wall structure has been built, where the panels are stacked one over another, as the channels and splines may no longer be visible. The slots 112 are visible in such circumstances, allowing a user to quickly and easily see where the splines are located within a given wall structure. Such slots 112 make attachment of drywall or other sheathing over the foam panels very easy, as the slots 112 mark the location of the center of the splines, which are easily nailed or screwed into, through the thickness of the foam between channels 104 and each respective face 106a, 106b. As internal channels 104a, 104b are optional, if they are not included, the pre-cut slots may also be omitted. In such instances, the positioning of the I-beam flanges (which also serve as attachment points for drywall or other sheathing) at the edge, or interface between adjacent panels similarly allows a user to quickly and easily see where the splines are located, for easy attachment of drywall, etc.

[0152] Figures 4-8 show progression of construction of a wall structure using a plurality of exemplary panels 100, in a post and beam type construction. The horizontal beams are provided by in-situ formed I-beams, that can be initially provided to the construction site prior to installation as lengths of separate OSB or similar elongate spline material, which splines are positioned in channels or on top and/or bottom of such panels to form the I- beams in place, as the wall is constructed. Prefabricated I-beams could also be used. The vertical posts of the system are placed between adjacent panels oriented side by side, for the wall. In Figure 4, there is shown a vertical post 138 (e.g., two 2x4s), positioned on a bottom plate 137 (e.g., a 2x4, other dimensional lumber, or the like) sandwiched between two splines 116 (which splines 116 will be inserted into bottom channels 104a" and 104b") of panel 100. Figure 5 shows one panel 100 in place relative to vertical post 138, bottom plate 137 and bottom splines 116.

[0153] Figure 6 shows two panels 100, positioned side by side, with vertical post 138 there between, separating the panels 100. Figure 6 also shows the 3 components for the in-situ formed I-beam positioned on the top of panels 100. The vertical flanges of the horizontally extending I-beam are provided by splines 116 positioned in top channels 104a' and 104b', while the web 116' of the I-beam 117 is provided by another spline (e.g., also an elongate strip of OSB or other suitable material), laid on the top planar edge 110a' at the top of panel 100. The web spline 116' has a width equal to the spacing between top channels 104a' and 104b', so as to span the distance between splines 116 placed therein, so that the two splines 116 (flanges of I-beam 117) and web 116' together form the I-beam. The 3 pieces of the I-beam 117 may be inserted one at a time, and glued together where such members 116, 116' contact one another (i.e., the sides of web 116'). Adhesive may also be applied in channels 104a' and 104b' and on planar surface 110a', to secure the I-beam 117 within panel 100. A panel could be provided with web spline 116' already glued or otherwise secured to the top planar face 110a' of panel 100, if desired. A pre-assembled I-beam 117 could also be used, e.g., as shown in Figures 13- 28.

[0154] While web spline 116' may only have a length that is equal to that of the panel 100 (e.g., 4 or 8 feet), the splines that form the flanges of the I-beam 117 may have a length greater than the panel, so as to extend across the vertical post 138, as shown in Figure 6. Such extension beyond the panel 100 of the flange 117 can also be achieved with ear brackets, as shown in Figures 13-28. Splines 116 of I-beam 117 could be nailed, screwed, glued, or otherwise secured to vertical post 138 at this junction, between adjacent side-by-side panels 100. Use of “ear brackets” for attachment of the I-beam to the frame members is described and shown in further detail below, in conjunction with Figures 13-28. In an embodiment, shorter splines could also be used, e.g., but still span from one panel 100, across vertical post 138, to the adjacent panel 100 (e.g., length of 4 feet, or even less). It is not necessary that the flanges of the I-beam be formed from single continuous pieces of OSB or other suitable material. For example, short lengths of OSB or metal waste material, which could be short pieces (e.g., 1 foot, 2 feet, 3 feet, 4 feet, etc.) could be fed into channels 104a', 104b' to form each flange of the I-beam 117. Because such short lengths would be constrained within stacked top and bottom channels (e.g., 104a' and 104a"), and may be glued in place, they will provide a sufficiently strong I-beam for the post and beam wall construction systems described herein.

[0155] Figure 7 shows a further progression of the wall construction, now with 4 panels 100, two side-by-side, and two stacked one on top of another. There is no need to stagger seams between panels, although they could be staggered, if desired. While Figures 5-7 do not show splines 116 inserted into interior channels 104 of the panels 100 in order to beher show other features, it will be appreciated that splines 116 can be inserted into any or all of such interior channels 104, as desired.

[0156] Figure 8 is similar to Figure 7, but shows a filler piece 158 of foam positioned over the vertical post 138, to fill the gap between adjacent side by side positioned panels 100. For example, the illustrated wall may be 2 panels wide, and 2 panels high (e.g., about 8 feet long, 4 feet high). By stacking another 2 heights of panels, the wall may be 8 feet high. Any height may be achieved by simply stacking the needed number of panels, with an I-beam horizontally oriented between each set of stacked panels. Any length may be provided to such a wall, by simply placing additional vertical posts (e.g., at 4 foot intervals, or other interval), with one column of panels positioned between such posts. As is further evident from Figure 8, where one panel 100 is stacked on top of another panel 100, there is an overlap profile between the adjoining panels at the seam 135, which prevents water from entering at what might otherwise be a simple horizontal seam between such stacked foam panels. In other words, the top and bohom outer edges of each panel include a stair stepped configuration at 133, as perhaps best shown in Figures 1-3, so that the horizontal seam 135 (Figure 8) is followed by an inclined or stair-stepped surface, preventing water from seeping into channels 104a', 104b', 104a" or 104b".

[0157] Any of the splines may be more securely retained within any of the channels with any suitable adhesive. Without use of such an adhesive, the building system may actually be reversible, allowing dis-assembly of the components in a way that allows them to easily and quickly be re-assembled, e.g., at a different time, or in a different location. Such characteristics may be particularly beneficial for temporary structures (e.g., emergency housing, sets for plays or other drama productions, and the like). Where an adhesive is used, such adhesive may be injected into the channel through pre-cut slot 112 (for channels 104), injected directly into the open top or bottom channels (for channels 104a', 104b' 104a" or 104b"), or placed on the splines 116, prior to channel insertion. Once dry wall or other sheathing is placed over the foam panel faces 106a or 106b, nails or screws may further be used to secure such sheathing to the splines 116 within any of such channels.

[0158] As described above, the splines 116 may have a length that is greater than the length of a given modular panel 100. In one such embodiment, a single spline 116 can run through aligned channels (similarly numbered) of more than one modular panel, positioned side by side. Figure 8 further shows how once the splines 116 are inserted into any of the various channels, splines disposed therein are not exposed on the outside faces 106a, 106b of the foam bodies of panels 100. The splines are constrained within their channels, having only 1 degree of freedom therein (i.e., the ability to slide axially, within the channel).

[0159] Many of the following Figures described hereafter show various configurations and uses in which the panels, splines, and building systems may be employed, as well as methods of use therefore. Figure 9 shows a wall formed from a plurality of panels 100, as well as how the panels may be used to form a roof structure, with panels positioned between adjacent truss members 130. In a similar manner as with the wall structures seen in Figures 5-8, I-beams 117 may be provided between adjacent stacked panels 100, while additional splines 116 may be provided, in interior central channels 104. The splines 116 in any such channels may extend beyond the length of each panel (e.g., due to use of ear brackets or the like), for attachment to truss members 130, as shown. The truss members may simply be spaced apart at a distance equal to the length of the panels (e.g., 4 feet). The wall may include a cap plate 128, as shown (e.g., to which truss members 130 may be attached).

[0160] Any desired roof pitch may be accommodated by such construction. Exemplary pitches include any desired pitch ratio, such as from 12/1 to 12/18 (e.g., 12/1; 12/2, 12/3; 12/4; 12/5; 12/6; 12/7; 12/8; 12/9; 12/10; 12/11; 12/12; 12/13; 12/14; 12/15; 12/16; 12/17; or 12/18). Another roof configuration using a transition panel is shown and described hereafter, in Figure 11, and Figures 13-28. A flat roof is of course also possible. As shown in Figure 9, where roof panels 100 may not extend down the full height of trusses 130, any unfilled space below panels 100 can be used for electrical and/or plumbing runs.

[0161] Figure 10 illustrates how a door (or window) opening may be provided in any given wall, e.g., by placing vertical beams 138 at the ends of such an opening, which may be spanned by a conventional header 120. While the panels may be provided in lengths of 4 or 8 feet or any other desired length, they are easily cut, e.g., using a conventional circular saw (e.g., with a deep blade). They can easily be cut before insertion of any spline flanges and/or I-beams (in which case one is simply cutting through foam), or after such splines are inserted (in which case one is simply cutting through foam and typically OSB, or other spline material (e.g., aluminum)). Where desired, specialty header panels could be provided, e.g., including a header slot formed into panels 100, e.g., as disclosed in Applicant’s U.S. Patent No. 10,450,736, herein incorporated by reference in its entirety. Any of the concepts disclosed therein may be adapted for use with the present wall panels.

[0162] While shown with straight planar walls, it will be appreciated that curved walls are also possible, e.g., by providing closely spaced (e.g., 6 inches or less, 4 inches or less, 3 inches or less, or 2 inches or less, such as 1 inch spacing) pre-cut slits into at least one face of the panel that is to be used in forming a curved wall. Such slits would allow the panel to be flexed, creating a curved continuous face along the opposite major planar face. Such slits could of course be filled in on the cut face, for finishing, if desired.

[0163] A strap or any other desired typical connector may be used to attach any of the vertical posts 138 to a foundation, as will be appreciated by those of skill in the art, in light of the present disclosure.

[0164] While electrical raceways 136 may provide a simple way to make electrical runs, other methods for wiring a structure using the present panel, post and beam constructions are also possible. For example, because the exterior of the wall prior to sheathing is formed from a material such as EPS foam that is easily worked, a portable hot wire cutting tool may be used to quickly cut traces or raceways through the foam face, in any configuration desired, for receipt of electrical wiring. Furthermore, current code allows such wiring to not need any conduit, where there is 1.5 inches or more between the exterior of any eventually applied sheathing, and the location of the wiring. The 1-2 inch foam thickness before reaching any of the channels (i.e., spline), coupled with a typical ½ inch or 5/8 inch drywall sheathing allows the wiring to simply be pressed into grooves cut into the foam face during wiring of the building, without the need for any conduit for housing such wiring. No posts or splines need be drilled or cut to accommodate such. [0165] Where the wiring crosses over a spline or post, a spiked or other metal plate may simply be pressed over the wiring, over the spline or post, to prevent a fastener from penetrating the wiring, when attempting to fasten into the spline or post. Such forming of a raceway in the face of the panels can be quickly and easily accomplished after the panels have been raised into the desired wall structures, during wiring of the building. A portable hot wire groove cutting tool can be used for such raceway formation. Such a tool is very quick (e.g., an 8 foot groove length may be formed in a matter of seconds, and the grooves may be freely run over the face of the panels, without regard to spline location, and without passage through any splines or posts (as would be typical in traditional framing). For example, such a groove may simply be “drawn” from a switch or other location to where the power is to be delivered (e.g., a light, outlet, etc.) in a straight line, across the panel(s) face(s).

[0166] In an embodiment, either the interior, exterior, or both foam panel faces of walls of a building may be tiled over with cementitious panels, e.g., such as available from Applicant. Because of the presence of the splines within the channels of the wall system, screws or other fasteners may be used for such attachment. An adhesive may additionally or alternatively be used. Any suitable adhesive may be used to adhere such panels to the foam face. While epoxy or urethane adhesives may be suitable in theory, a polymer modified cement based adhesive may be preferred, as the urethane and epoxy adhesives have been found by the present inventor to be finicky, making it difficult if a user wishes to reposition a panel once it has initially been placed over the adhesive coated foam. [0167] For example, the epoxy and urethane adhesives typically set very quickly, providing little time for the user to perform any needed repositioning or adjustment of a placed panel. Furthermore, because the bonding strength is so great, when attempting to reposition such a bonded panel, chunks of underlying foam may be pulled from the foam frame structure (floor, wall, ceiling, roof, or the like) when attempting debonding, which is of course problematic. A polymer modified cement based adhesive provides greater cure time, allowing some flexibility in positioning, and repositioning, before the bond between the panel and foam frame member becomes permanent and strong. That said, urethane and epoxy adhesives (e.g., foaming adhesives) may also be used, where desired. Methods and other characteristics for such tiling, information relative to adhesives, and the like is found within Applicant’s Application Serial No. U.S. Patent Application No. 15/426,756 (18944.9), herein incorporated by reference in its entirety. Examples of Applicant’s other building systems which may include various features that can be incorporated to some degree herein include U.S. Patent Application Nos. 13/866,569; 13/436,403; 62/722,591; 62/746,118; 16,549,901, and 16/653,579, each of which is incorporated herein by reference in its entirety. The last four patent applications describe exterior applied sealants that may be used, as such, in the present invention.

[0168] All components and steps of the method and system can be handled without heavy equipment (e.g., cranes), with the possible exception of any very large, heavy reinforcing structural frame members that may be embedded in any of the foam modular panel members, positioned between such panels, or the like. In fact, the modular panels and splines are so light as to be easily handled and positioned by a crew of women. For example, the panels (e.g., 2 feet x 4 feet) may weigh less than 40 lbs, less than 30 lbs, less than 20 lbs, or less than 15 lbs. A 2 foot x 8 foot panel (e.g., see Figures 13-28) weighs only about 6-7 lbs. Corresponding aluminum splines as shown in Figures 13-28 similarly only weigh about 6-7 lbs each.

[0169] In the case of OSB or similar splines, because strips of such OSB material are very light (e.g., less than 10, 5 or even 3 lbs), and/or because there is typically no need to use splines that are of a single piece of continuous material, such crew members could push scrap material (e.g., scrap OSB strips) into the channels, which scrap material could serve as the splines. As a result, a construction site using such methods may generate very little, if any waste, e.g., far less such waste than is generated when using traditional framing techniques. In addition, it will be apparent that when constructing a given building, far fewer 2x4s will be needed, as there are no conventional single “studs” present in the construction, but rather use of OSB or similar elongate strips of material, as the splines are used, in conjunction with vertical post members and other members of the frame (which may be formed from pairs of 2x4s, steel, or the like), but which are only spaced typically every 4 feet, 8 feet or 12 feet (depending on structural requirements), requiring far fewer 2x4s than a typical frame construction in which 2x4 studs are spaced at 24 or 16 inches on center.

[0170] Figure 11 shows an exemplary building construction that employs the panels 100 as described herein for construction of the walls, and which shows use of a wall-to-roof transition panel 200 at the top of the wall structure, for providing a transition from such standard panels 100, to the same standard panels 100 used for the roof construction. Similar to panel 100, wall-to-roof transition panel 200 is shown as including a pair of lower channels 104a" and 104b", allowing formation of an I-beam the same as with any of the standard wall panels 100, between the top most wall panel 100 and wall-to-roof transition panel 200. Panel 200 is also shown as including an additional pair of channels 105 a' and 105b', which are analogous to the top channels 104a' and 104b' of any of the standard wall panels, but which are oriented at an angle relative to bottom channels 104a", 104b", where the angle corresponds to the pitch of the roof being constructed. Channels 105a', 105b' thus line up with the bottom channels 104a" and 104b", respectively, of the standard panel 100 positioned as the first roof panel, adjacent wall- to-roof transition panel 200, as shown.

[0171] Wall-to-roof Transition panel 200 thus allows in-situ formation of an I-beam between the wall-to-roof transition panel 200 and the top most wall panel 100, and another I-beam between the wall-to-roof transition panel 200 and the adjacent roof panel 100. Wall-to-roof Transition panel 200 can include slots 203 for insertion of stiffening members (e.g., furring splines or strips), as shown, to provide additional attachment points for attachment of covering materials placed over the panel. Figure 12A shows a close up of the eave area of Figure 11, better showing how the wall-to-roof transition panel 200 integrates with the adjacent roof panel 100 and the adjacent top most wall panel 100. Another similar wall-to-roof transition panel is shown and described in conjunction with Figures 13-28, below.

[0172] Figure 11 further shows a roof cap transition panel 202, configured to transition between standard roof panels 100, at the apex of such a pitched roof. Roof cap panel 202 also includes 2 pairs of edge channels, configured to be aligned with the top channels 104a' and 104b' of the two adjacent roof panels 100. The pairs of edge channels of the roof cap transition panel are angled relative to one another, e.g., at double the angle defined between the pairs of channels in wall-to-roof transition panel 200, as dictated by the pitch of the roof. Such wall-to-roof transition panels 200 and roof cap transition panels 202 may be custom provided to the building site, along with a desired number of standard panels (for walls and rool), as determined from the plan or blueprint of the building being constructed. Wall-to-floor transition panels may also similarly be provided, as described herein.

[0173] Figures 11 and 12B further shows how panels similar or identical to standard panels 100 may be used to form the floor. Such floor panels 204 in Figures 11 and 12B are shown similar to the standard wall and roof panels 100, except that they may only include one “top” channel, and one “bottom” channel adjacent the face of the panel that becomes the interior floor. Because the panels are rotated (laid on the ground instead of oriented vertically, as in a wall construction), what would be “top” and “bottom” channels are now simply both adjacent to the upper floor face of the panel, one to the right, and one to the left (rather than top and bottom).

[0174] The floor panel optionally may not include channels adjacent the bottom face of the floor panels 204 (such panels may simply be positioned over a pea gravel base or the like). Alternatively, as shown in Figures 13-28, the same standard panels as used for the walls may also be used for the floor. As shown in Figures 11 and 12B, a notch 206 that is exposed on the bottom face of such floor panels 204 may be provided, e.g., to raise at least that portion of the floor panels up off such a gravel or other base, should such be desired. Figure 12B shows a close up of such a floor panel, showing the notch 206.

[0175] Figures 13-28 illustrate a building system according to the present invention, in further detail, as a progressive construction of a simple, exemplary structure. It will be appreciated that more complex structures, in an essentially unlimited variety, may be constructed using the described building system. As shown, a plurality of standard panels 100 as described herein are used for the floor, the walls, and the roof. Specialized transition panels are provided to make the transition from wall to floor, (i.e., in a uniquely configured wall-to-floor transition panel), and from wall to roof (i.e., in a uniquely configured wall-to-roof transition panel). Where the roof is a pitched roof, a roof cap transition panel 202 may be provided, to make the transition from one standard panel to the next standard panel, both present in the roof (e.g., on different sides of the apex of a pitched rool).

[0176] The building system includes a frame that carries loads from the splines to the frame to the foundation. The frame can be designed to include any conceivable architectural shape, and can be engineered to handle appropriate external loads. The frame can act as a template to which splines and the insulating lightweight panels can be attached. This allows the splines and lightweight panels to remain standardized, with unique frames (formed from frame members) and unique transition panels defining the shape of the structure. This system makes it possible to construct walls, floors and roof of the system with precisely the same method.

[0177] Figure 13 shows various transition panels, including the uniquely shaped roof cap transition panel 202. As shown, panel 202 may include channels 104a" and 104b" identical to those of a standard panel 100 on one end, with the same channels 104c' and 104d' on the other end, but in which the top end 110a of the panel adjacent such channels 104c', 104d' is differently configured (e.g., includes cut-away portions) to better facilitate insertion of the roof cap transition panel 202 onto the apex of the roof, in a manner so as to mate with the adjacent standard panels 100, mating on either side of panel 202. The illustrated cut-away portions in top end 110a, adjacent channels 104c' and 104d' allows the “bottom end” 110b (configured the same as bottom end 110b of panel 100) of panel 202 to be pressed into the flanges 116 of I-beam 117, while the other end 110a is simply able to rotate downward towards the adjacent standard roof panel 100, so that the flanges 116 of the corresponding I-beam 117 rest in channels 104c' and 104d'. The cut-away top end 110a as shown in panel 202 allows simplified assembly as compared to requiring longitudinal sliding of panel 202 relative to the I-beams 117 mated on either end (at ends 110a and 110b).

[0178] Figure 13 also illustrates a wall-to-roof transition panel 200 similar to that shown in Figures 11-12A. For example, transition panel 200 includes a pair of lower channels 104a" and 104b", for mating with an I-beam the same as with any of the standard wall panels 100, between the top most wall panel 100 and transition panel 200. Panel 200 is also shown as including an additional pair of channels 105a' and 105b', which are analogous to the top channels 104a' and 104b' of any of the standard wall panels 100, but which are oriented at an angle (other than 180°) relative to bottom channels 104a", 104b", where the angle corresponds to the pitch of the roof being constructed. Actual angles for given pitch values are easily calculated using standard trigonometry (e.g., for pitches of from 12/1 to 12/18 (e.g., 12/1; 12/2, 12/3; 12/4; 12/5; 12/6; 12/7; 12/8; 12/9; 12/10; 12/11; 12/12; 12/13; 12/14; 12/15; 12/16; 12/17; or 12/18)). Channels 105a', 105b' thus line up with the bottom channels 104a" and 104b", respectively, of the standard panel 100 positioned as the first roof panel, adjacent transition panel 200, as described herein. Transition panel 200 thus facilitates placement of an I-beam between the transition panel 200 and the top most wall panel 100, and another I-beam between the transition panel 200 and the adjacent roof panel 100 (through channels 104a", 104b" and channels 105a', 105b', respectively).

[0179] Transition panel 200 is also shown as including various shaped slots 203 for insertion of stiffening members, e.g., to provide attachment points for facia, etc. The illustrated configuration includes a C-shaped slot 203 running horizontally, parallel to the free eave end E of the transition panel 200. As shown, a pre-cut slot 112 may be provided in eave end E, e.g., centered on C-shaped slot 203. In the illustrated configuration, the open end of the C is oriented inward, away from eave end E, providing an attachment point into which facia or other covering structures can be screwed, nailed, or otherwise fastened into. Other shaped slots could be provided, for receiving other shaped spline members (e.g., I-beam shaped, H-beam shaped, L- beam shaped, etc.). [0180] Wall-to-roof transition panel 200 may be described as including 3 portions - a wall leg (terminating in channels 104a", 104b") that mates with the adjacent top-most wall panel of the wall being constructed; a roof leg (terminating in channels 105a', 105b') that mates with the adjacent first roof panel of the pitched roof being constructed; and an eave portion, e.g., coplanar with the roof portion, but extending oppositely, away from channels 105 a', 105b' and the roof portion, so as to form an eave of a desired configuration. It will be apparent that the length of the wall leg and the length of the roof leg can be independently specifically selected as needed, to accommodate a desired wall height (that is not an even multiple of the height of the standard panel 100), as well as to accommodate a desired roof plane length (that is not an even multiple of the width of the standard panel 100 used on the roof). Adjustments in roof plane length can also be made by adjusting the lengths of the two ends of the roof cap transition panel 202.

[0181] Figure 13 further shows an exemplary wall-to-floor transition panel 208. Transition panel 208 is shown as similar to the standard wall and roof panels 100, including the top channels 104a' and 104b', with the top end of panel 208 being identically configured to any of the standard panels 100. Such top channels 104a' and 104b' receive flanges 116 of I-beam 117, connecting the transition panel 208 to the bottom most standard panel 100 of the wall structure. In order for transition panel 208 to connect in the same manner (through I-beams 117) to an adjacent standard panel 100 that makes up the floor, a pair of channels are provided in the inside face, near the bottom of transition panel 208, with otherwise identical characteristics to any of the other bottom channels 104a" and 104b", except that these channels are in the face 106a of panel 208 rather than in bottom end 110b. As shown, one or more additional furring slots 203 may additionally be provided, e.g., for providing attachment points, similar to slots 203 shown in wall-to-roof transition panel 200. For example, a C-shaped spline or furring strip could be inserted into the C-shaped slot 203, while an L-shaped spline or furring strip could be inserted (e.g., either or both horizontally) into the illustrated C and L- shaped slots. Of course other shaped slots could also be provided, as desired, to accommodate differently shaped splines in such slots. [0182] It will be appreciated that a differently configured wall-to-floor transition panel may be provided, e.g., for providing the floor of an upper floor (e.g., a 2 ^nd floor) in a multistory building construction. An example of such is shown in Figure 13A. For example, such a 2 ^nd story wall-to-floor transition panel 208' may include an additional lower wall leg as compared to the configuration 208 shown in Figure 13, so as to be T- shaped. For example, the top of the “T” may provide the 2 wall legs WL (e.g., in-line, 180° apart), with the floor leg FL being at 90° relative to both wall legs WL. The upper wall leg thus forms the lowest portion of the 2 ^nd story wall, while the lower wall leg forms the topmost portion of the 1 ^st story wall. It will of course be appreciated that such T-shaped wall-to-floor transition panels may be used for any story (e.g., 2 ^nd , 3 ^rd , etc.) above the first story. In Figure 13A, the channels of the lower wall leg are also labeled 104a' and 104b', as they may be similarly or identically configured as the analogous channels of the upper wall leg.

[0183] In such a building construction, the wall-to-roof transition panel 200 may thus only be used on the top-most story, adjacent the roof, while any lower stories would include the T-shaped “2 ^nd story” wall-to-floor transition panel 208', at the transition from a lower story, to the adjacent higher story.

[0184] Figures 14-28 illustrate progressive steps according to which an exemplary building may be constructed, using the presently described building systems. For example, Figure 14 shows assembly of an exemplary frame formed from exemplary vertical post frame members 212, horizontal beam frame members 214, and angled truss frame members 216. Such individual members may be connected to one another through appropriate brackets 220, as shown. It will be appreciated that where the building to be constructed may not include a pitched roof, the illustrated truss members may instead simply run horizontally, defining where the roof structure will be. Such a frame, in conjunction with the fact that the panels are cut using a CNC precision device, acts as a jig, ensuring that the walls, floor, and roof structure will be nearly perfectly square and plumb, as desired. Such is advantageous over traditional stick frame construction methods, where walls, floors, and roof often deviate slightly from the desired square and plumb relationships. Such frame members 212-216 may be of any desired material (e.g., steel, other metal, wood lumber, etc.). Steel may be preferred, as wood lumber can be notorious for being warped, etc. The frame may actually bear any load applied to the building, such that the panels 100 used to construct the walls are not necessarily load bearing (but merely fill the opening in).

[0185] As shown, the structure can be supported on a plurality of pier footings 218. Such a configuration as described does not require the use of any continuous footings, or the use of a typical concrete or similar slab. The present configurations may advantageously be void of such features, which otherwise increase costs, and result in decreased comfort (e.g., the present configuration provides for an insulated, “soft” floor, as compared to a concrete slab, as will be apparent from the present description).

[0186] Turning to Figure 15, one of the standard I-beams 117 may be attached between frame members (e.g., members 214), and wall-to-floor transition panel 208 positioned so that flanges 116 of I-beam 117 are received into channels 104a" and 104b". Web 116' of I-beam 117 rests against face 110c (analogous to bottom face 110b in a standard panel 100). It will be appreciated that the I-beams 117 could be provided prefabricated, as shown, or could be assembled in-situ, as described elsewhere herein. Such I-beams may be of aluminum or other suitable metal material, wood (e.g., OSB), plastic, or other suitable material.

[0187] While I-beam configurations are shown in particular, it will be appreciated that other geometry beams (e.g., C-beams, H-beams, L-beams, or other shapes, providing other moment of inertia characteristics) could alternatively be used for positioning in between any of the various modular panels, as splines. The description and claims generally reference “I-beam” for simplicity, although it will be appreciated that other such geometries can be included within the scope of the claimed invention.

[0188] Figure 15 further illustrates the use of connecting “ear” brackets 222. Such ear brackets can simply be fastened as shown, to appropriate frame members (e.g., as shown to frame members 214), securing I-beam 117 to members of the frame. Of course, panel 208 can be secured to I-beam 117 as described herein (e.g., use of an adhesive, or even just a friction fit between flanges 116 and channels 104a" and 104b"). Figure 16 shows the same configuration as Figure 15, once panel 208 has been fully inserted (i.e., flanges 116 into channels 104a" and 104b") relative to I-beam 117.

[0189] Figure 29 illustrates an alternative connection mechanism between an I-beam or other configured spline 117 and the frame member (e.g., illustrated frame member 214'). While a horizontal frame member analogous to frame member 214 is shown in Figure 29, it will be appreciated that other frame members (e.g., 212, 216) may be similarly configured. For example, as shown in Figure 29, the frame member may include its own flange or ear 222' (e.g., an ear bracket flange portion 222'), to which the flange 116 of I- beam spline 117 is attached, e.g., with screw 223. It will be apparent that numerous connection mechanisms between the splines and frame members (as well as between other connected components of the system) are possible, such that the particular configurations illustrated are simply exemplary.

[0190] Figure 17 illustrates the same configuration, but once a standard panel 100 has been positioned (e.g., slid) adjacent the I-beam 117 mated into the corresponding channels adjacent surface 110c of transition panel 208. As shown in Figure 18, additional standard panels 100 can be positioned, to provide the floor structure of the building, with the standard I-beam or other splines 117 positioned in between each pair of adjacent panels. Figures 19-20 show attachment of another wall-to-floor transition panel 208, at the other end of the floor, where the opposite wall is to be constructed. Positioning and attachment of the panel 208 is similar to attachment of the panel 208 at the opposite end of the floor.

[0191] Because the panels 100 used on the floor are rotated (laid horizontally (e.g., “on the ground” instead of oriented vertically, as in a wall construction), what would be “top” and “bottom” channels are now simply adjacent to the top and bottom faces of the panel, on the right, and left sides. As shown, the floor may actually be a “floating floor”, positioned above the ground in which the pier footings are positioned. While a pea gravel other base could be provided, such is not necessary, and may not be present.

[0192] Figure 21 shows the same configuration of Figure 20, but with the addition of another of the standard I-beams, positioned in top channels 104a' and 104b', and adjacent surface 110a, in preparation for construction of the vertical wall that the transition panel 208 provides the transition to. As is apparent in the construction of the floor and walls, the I-beams 117 become embedded, and fully concealed within the constructed wall or floor or roof, without any exposure of such I-beams on the external major planar faces of the panels 100. Such lack of exposure is advantageous for preventing ghosting, and other benefits, as described herein.

[0193] As shown in Figure 22, once the desired number of wall panels 100 have been stacked, one upon another (with I-beams 117 in between each), the top of the wall structure can be capped with another transition panel, this time a wall-to-roof transition panel 200, already described in conjunction with Figure 13. As is apparent from Figure 22, an appropriate spline (e.g., I-beam 117) may be inserted into the slot 203 of transition panel 200, in the eave portion thereof. While Figure 13 illustrates a C-shaped slot 203 adjacent the eave end E, Figure 22 illustrates use of an alternative I-shaped slot, configured to receive one of the standard I-beam splines 117. It will be appreciated that various configurations are possible, to provide desired attachment points within eave end E of transition panel 200. With slot 203 filled with an appropriate stiffening member (e.g., I-beam 117 or other spline), panel 200 is maneuvered into position and mated into the I-beam 117 or other spline inserted into the corresponding slots of the top most panel 100 of the wall structure, as shown, in Figure 23-24.

[0194] The height of any desired wall can be accommodated (even where the height does not correspond to an even multiple of the standard panel height, such as 2 feet), by adjusting the length of the vertical wall leg W (Figure 22) of the transition panel 200. For example, for a 9 foot wall height, 4 panels each of 2 feet in height will provide 8 feet of the wall height, such that the length of the vertical wall leg W may be set at the needed 1 foot, to accommodate the desired height. It will be apparent that such configuration accommodates any desired wall height.

[0195] A similar adjustment to the length of the roof plane is similarly provided by the length that is selected for the roof leg (the leg that is adjacent to the wall leg W, which is angled therefrom, at an angle corresponding to the pitch of the roof being formed). In other words, accommodation of specific roof plane lengths are possible by adjusting the length of the roof leg of panel 200, (i.e., that leg including channels 105a' and 105b'). The length of this roof leg portion of the wall-to-roof transition panel 200 allows selection of an appropriate length to accommodate a desired roof length for the roof which it forms a top portion of.

[0196] It is also apparent that the transition panel also dictates the shape and length of the eave associated with the roof. Such integration of the eave into the transition panel 200 is advantageous, as it eliminates the need for construction of separate eave members (which is time consuming, and tedious, as those in the construction trade will appreciate). For example, the eave portion of the panel 200 is shown as being coplanar with the roof leg, extending oppositely therefrom (i.e., on the other side from the roof leg, relative to the wall leg W that separates the eave portion from the roof leg of the transition panel 200). [0197] As shown in Figure 25, with the wall-to-roof transition panel 200 in place, the roof can be constructed by using the same standard panels 100 that were used on the walls and floor, by simply positioning each panel between the truss members 216 of the building frame, inserting an I-beam spline into the channels 104a', 104b' of one panel, and 104a", 104b" of the adjacent panel. Of course, the flanges 116 of the I-beam positioned between the first standard roof panel 100 and the transition panel 200 is accommodated in the same manner, with one side of the flanges 116 of I-beam 117 received into channels 105a' and 105b' of transition panel 200, and the other side of the flanges 116 of the same I-beam 117 received into channels 104a" and 104b" of the standard panel 100 of the roof. As shown in Figure 25, both sides of such a pitched roof are formed in this manner until reaching the area of the apex of such a pitched roof.

[0198] As shown in Figures 25-27, the roof cap transition panel 202 is used to complete the apex portion of the roof structure. As shown in Figure 26, once the more standard channels 104a" and 104b" are engaged with their corresponding I-beam 117, the roof cap transition panel 202 may be rotated downward, and because of the cut-away portion at surface 110a of transition panel 202, its rotation is unimpeded as it rotates into proper engagement with the I-beam 117 on the other end, for reception into channels 110c' and llOd'.

[0199] Figure 28 shows the exemplary structure complete, with floor, walls, and roof. The other walls at either end are shown open to better illustrate the other structures, although it will be appreciated that these walls may be filled in with standard wall panels using the same building system and techniques as described herein.

[0200] By way of example, the standard (and other panels) may each be provided in a standard dimension, such as 2 feet in height, by 8 feet in length. Such exemplary panels are lightweight, for example, weighing about 6 lbs for the standard panels 100 shown. If pre-fabricated I-beams 117 are used, e.g., made of aluminum, such similarly only weigh about 7 lbs. The system is thus easily employed by those of limited strength, and without any skilled training.

[0201] While the Figures illustrate construction of simple exemplary walls and buildings to illustrate concepts of the present construction methods and systems, it will be appreciated that the methods and systems may be used to construct a nearly endless variety of buildings. [0202] It will also be appreciated that the present claimed invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative, not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope. Additionally, as used in this specification and the appended claims, the singular forms “a,” “an” and “the” include plural referents unless the context clearly dictates otherwise.