A COMPOSITE PRECAST CAST INSITUE BUILDING SYSTEM DETAILED DESCRIPTION BACKGROUND OF INVENTION This invention is an enhancement, improvement, upgrading and addition of features and capabilities to a previous invention in the same field-that of pre-cast components forming a building. Whereby small homes/villas as well as high-raise apartments, office buildings and larger span structures such as schoolrooms and shopping structures with more distance between columns can be equally accommodated. The new invention consists of a vertical wall with protruding slabs extending horizontally from its top and bottom ends for a distance of about one meter (a ratio that is a function of the slab span, weights on it, the adjacent elements and degree rigidity in the adjacent joints. About 20 cm. before the edge, each slab is reduced in thickness to half its previous size. Steel reinforcing bars run vertically continuously through the cross section (see figure # 2) and protrude a distance of about 30 bar diameters of the reinforcing steel used from both the top and bottom slabs. (This is in addition to horizontal steel and or wire mesh as needed). At the top and bottom of said wall panel rectangular cavities that penetrate either all the way through (in high rises), or about 40 cm. (in shorter low column stress buildings), at equally spaced intervals to connect the panel to the adjacent floors above and below. There are equally spaced holes in the thicker part of the slab used to fasten a steel plate-form flush to the bottom side of the slab linking it to a similar panel opposite and facing it. (see fig. # 1). Concrete is poured on the protruding steel from each side after steel reinforcing bars or wire mesh is added as needed to counter shear and moments stresses.

A means for taking up space such as Styrofoam, empty cardboard boxes or cylindrical cardboard tubes or pvc is inserted in the middle third of the slab as needed, then concrete is poured on top to cover the top steel layer and to bring the elevation to the same level as the pre-cast on each side. Work does not have to be interrupted waiting for the slabs concrete to dry as a slightly elevated platform with numerous slots resting on the pre cast slabs on either side of the freshly poured concrete is used. This allows air and water to penetrate to the wet concrete for proper curing.

The same method is used to construct the bottom slab connecting the two pre cast panels that are also facing each other together. (See fig. # 4). The result is a structurally integrated rectangular room acting for all practical purposes as a monolithic rectangle with moments in one slab or wall able to be transmitted to the other members of the room due to its rigid corners. The same method is used in constructing the ground floor where only the top half of all of the above mentioned panels are used. (See figure # 1).

Unobstructed open space with no columns in the ground floor can be extended by using the bottom half of an internal composite pre-cast wall (the inverted) as a girder to transfer the loads from the ceiling center of a structure to columns widely spaced at right angles to the direction of the two load bearing wails. (See fig. # 1) By placing four wall panels facing inward each at 90 degrees to its previous, a room is created with a one meter taper edged slab along its rim/outer part (both the ceiling and floor), formed by means of pre-cast panels.

This feature enables us to draw on the four walls in a room instead of only two in absolving the slab moments and redistributing them to all five adjacent members (four walls plus ceiling) also any adjacent internal slabs, thereby considerably reducing the bending in said slab and consequently requiring less steel less concrete thickness and less labor, thus lighter foundations each one of these is a saving. Concrete is poured on a steel plate/form after bolting it to the bottom of all four sides of the pre-cast slabs both for the ceiling and floor, and after adding steel reinforcing bars or wire mesh or reinforcing fiber as required until the steel is covered with at least 3 or 4 cams. In most cases, then in the middle third a means for lightening the slab and taking up space is used such as Styrofoam or cardboard boxes as needs and as described in the previous two directional loading cases mentioned above.

The internal walls"I"shaped in cross-section is assembled by putting a"T" shaped pre-cast-panel on top of an inverted similar one and bracing then with a steel plate on each side of the web (see fig. # 3), then by means of long bolts holding both steel plates together. Note that these T panels also have steel running through them and protruding from all their three extremities. As in the previous cases, 20 cm. before the end of each side of the flenge/slab a drop in the thickness of the slab to half its previous size is noted.

Concrete is poured through rectangular intervened slots in the middle of the top panel those different floors The concrete runs down these voids down through to the end of the web, filling the void between the two"T"s shaped panels (one inverted on top of the other) its web steel protruding and facing each other half way up the newly formed wall. The two steel plates flanking the web/wall are kept as support for the wall allowing us to work on the ceiling while the even though the wall has not gained its full strength yet, in addition to the two steel plates function as form work during concrete pouring. This enables us to work on the ceiling slab even though the wall is still weak at its center. This"I"pre-cast section can be used in an internal room to form two or all four facing walls to redistribute the moments between the different elements in a room and get the adjacent rooms to help by carrying part of the moments (see fig #1).

INTRODUCTION OF THE INVENTION The new invention consists of a vertical wall that bends 90 degrees and continues horizontally for about a meter both at the top of the wall and at the bottom, these two horizontal slabs are reduced to half their previous thickness 20 cms. from each slab end. Steel reinforcing bars runs through the panel and protrudes from both slabs for a distance of about 30 bar diameters of the used steel. Insulating material can be sandwiched in the walls if needed to prevent heat conduction and f or to make the panel lighter. By placing two such panels with their protruding steel facing inward and pouring concrete on said steel rebar after securely placing and fastening a steel plate/form flush on to the bottom of the slabs said steel is toped off at the same level of the two adjacent pre-cast slab panels. By repeating this process in both top and bottom slabs one produces an integrated concrete room with rigid corners (as additional steel is embedded in all corners) which ensure the transfer and redistributes of moments between the rooms components and adjoining slabs.

This moment and deflection sharing reduces and elevates both the moments and the deflection in the floor slab as part of it is now carried by the adjacent walls, slabs, and ceiling.

By adding two more pre-cast wall panels in the same space after rotating them 90 degrees about the center of the rooms vertical axis and tapering all the slabs corners thereby having a total of four panels (see fig # 4) Then placing securely a steel plate underneath the four slabs and pouring concrete on the protruding steel rebar in the center of the room (after adding any extra steel or wire mesh as needed and adding any means of lightning such as cardboard or Styrofoam, we would have a room with a ceiling, a floor and four walls. As an alternate to pouring concrete into the middle of the slab, a pre-cast slab can be placed both for the two and four wall conditions. (See fig # 3).

"shaped walls, (in cross-section) are used for internal walls. Composed of two"T" shaped cross-sections one inverted under the other. Formed into an I by placing a steel plate on each side of the two"T"s intersecting webs. As in the case of the slabs mentioned above, steel bars run through and protrude from slab ends, also steel bars runs through and protrudes from the two intersecting vertical webs /stems. Concrete is poured through slots centered on the top flange (directly above the wall/web) the concrete runs through to, and fills the center hollow portion of the newly formed I and rests sandwiched between the two steel plates after adding any needed extra steel in this poured in place wall portion. The same method for connecting the two sides of the room is used, that is, by pouring concrete on a steel plate fastened flush to the bottom of the slabs after adding any extra steel Wire mesh, or fiber required. If needed a means for making the slab lighter is used such as Styrofoam or cardboard boxes or tubes or lightweight concrete. The slab is then toped off at the same level as the adjacent pre-cast slabs.

By using four (in stead of two) pre-cast wall panels with their adjoining rigid short slabs and rigid joints each at 90 degrees to the next panel, this invention enables us to carry heavier loads and span longer roomslhalls, (See fig # 1) in such cases, all four pre-cast about one meter long taper ended rigid slabs and rigid joints are used to transfer the moments to the four walls encircling the slab, and all four sides carry the load and moment collectively. Additional steel is added to the protruding steel facing inward from all four corners, then a steel plate is fastened flush against the bottom of the four slabs, then concrete is poured, if needed Styrofoam or cardboard filler boxes or tubes are placed in the middle third of the slab then the slab is toped off to the same level as the four adjacent pre-cast slabs after adding any top needed steel.

On the ground floor all the above still applies however only the top half of the above mentioned panels are used, thereby a structural slab is obtained. (See fig # 1).

ADVANTAGES OF THE NEW INVENTION The purpose of this invention is to simplify, facilitate the manufacturing of, lighten the pre-cast elements in, add new span range capabilities to, and add flexibility, while still retaining all the exceptional advantages of the previous invention. This is accompiished by using the same concept of transferring moments back and forth between floors, walls and ceilings by means of inflexible rigid corners that redistribute the moments and thereby reduce both the moments and the deflections in the loaded slabs primarily or any other adjacent connected element be it a wall adjacent slab or a ceiling.

New additional advantages in the new invention: 1. Weight The average weight of the pre-cast panels has been cut by about one third of what it was in the previous invention expounding; The length of the cross section of a panel has been reduced from its previous"U"shaped panel where we had: 1.5 meters (Half a walls height) + 4 meters (slab dimension of room width) + 1. 5 (Half wall height on opposite side) = 7 meters. (See fig. # 2) To : 0.8 (top slab after subtracting wall thickness) + 3.0 meters (elevation of wall) +0.8 (bottom slab after subtracting wall thickness) = 4.6 meters that a (7-4.6)/7 *100.34 % reduction in weight This feature reduces the size of the cranes used in the construction process, thereby reducing construction costs.

2. Finishing The construction joints half way up the walls, where the two panels connected on either side of the room in the previous invention, used to be costly and labor intensive to conceal, requiring skill, time and special attention to make it disappear completely. That added to the construction in both time and money trying to hide it as we had to hide four construction joints two inside the room and two on the exterior sides which was difficult to reach if it was on the out side of the building requiring scaffolding on upper floors just for that one task. In the new invention there are no construction joints halfway up the walls as wall panels come in one piece and the joint is in the slab and since the floors are always covered, one way or another by means of carpet or tile that took care of the construction joints in the floors for good. As for the bottom joints that will show up in the ceilings of the floor below, since the steel protruding from the panels is much longer (30 bar diameters of the used reinforcing steel bars) and is numerous and uniformly distributed over the cross-section of the slab, the shrinking stresses in the slab are even due to the even grip of the concrete on the steel rebar, in the previous invention it was not possible easily to have many connecting rods between the two panels, so we used two or three rods in the entire slab concentrating the stresses in these areas. Even though the construction lines in the ceiling will not be apparent due to the flush steel form and the length of the protruding steel giving it a good grip and evenness on either side of the connected, somehow construction joints in ceilings are more tolerated perhaps because in many construction systems such as hollow core pre-cast panels and others, we are used to seeing them, as opposed to a line half way up the wall which is never seen.

3. Flexibility : Since the center part is poured in place after flanking it with a pre-cast panel on each side, the rooms can be flexible and have varying dimension in length and width, yet still use the same standard wall panels (with their partial slab protruding from the top and bottom.). This feature reduces the number of variable panels which in turn allows us to stock up a large number of panels in advance as they will always fit since almost always all rooms in a building are the same height and one can further say that most, say homes or apartments are of similar standard heights which is our pre set constant, and most rooms would vary in length and width and these can be accommodated by adding to a shorter panel. One can also store long panels and tailor them later by cutting them vertically to the required width. As mentioned previously means for lightening the weight and or cutting the heat transfer can be embedded on an individual bases, adding to the flexibility of this system. The panels always fits perfectly since the center portion of the floor slab is poured in place thereby accommodating any and all size rooms within a category, such as residential rooms verses another heavier category say industrial or storage usage which would require a thicker slab to accommodate the extra shear and moment stresses. This thicker slab presents no problem as concrete would be poured until the center-piece is toped off at the same level as the adjacent pre-cast panels.

The previous pre-cast panel limited the length of the slab due to the limitations imposed by the form. The new invention is flexible in that sense.

4. Maneuverability The new internal panels"I"and especially the two"T"s one inverted under the other are small in its components size enabling it to be use with ease in high-rise buildings and harder to maneuver in buildings, and building sites under construction, renovation sites and the like. This new invention provides us with an instant assembelable load-bearing wall thus (while the center part of the wall is still strengthening the steel plates that flank the wall carry the load in addition to being the form work).

5. Capability of covering larger areas: By introducing four walls with rigid corners the load and moments can be distributed to the four adjacent walls instead of just two reducing the intensity, also the fact that each component is smaller and thus lighter enabling us to assemble the slab in three parts in stead of one makes it practical to go for lager (after assembling structures).

Need to upgrade and develop the invention Even though the previous invention had succeeded because it cut the stresses by about a third due to redistributing the moments to the adjoining members, and its multifunctional utilization of one panel, (as a wall, floor, ceiling, stairwell elevator shaft, grade beam among others usages) using one casting form making it economical to manufacture on site thus reducing transportation cost, I had to overcome inherent limitations that stifled its world wide perforation and use on a very large scale. These limitations-Weight, finishing, flexibility, capability to cover larger spans and maneuverability have all been addressed and effectively eliminated in the new invention.

Brief Description of the Figures: Figure # 1/4 This figure gives a comprehensive view of the invention, showing a cross-section of a building using this new system where an external wall panel (# 1) Is facing an internal composite panel composed of a"T"section {labeled # 4), under which a similar inverted"T"section (# 5). The two are joined in the middle by means of a steel plate (# 23) on each side of the stem/wed. Slots (# 24) at the top centered on the wall (# 4) are used to pour concrete to fill the center portion of the wall. A steel ptate/form (# 3) is fastened (# 7) connecting the external panel (#1) to the internal bottom panel (# 5). Concrete is poured on form (# 3) to cover the bottom steel reinforcing bars (# 15) that are protruding from each of the two panels. A means of lightning and or a thermal barrier (# 9) is added. Concrete is then added to cover the top steel (# 16) protruding from both sides. Concrete is added to cover the pre- cast stepped down (# 11) portion on each end and is toped off leveled with the slabs on each side of the newly formed room. An elevated, perforated steel platform is put on top of the newly poured slab (# 26) if one desires to work before the concrete is totally strong. Alternately per cast hollow core slabs (# 18) having elongated tubular cavities can be cut to size and secured on both sides by embedding the protruding steel on each side into the hollow cylindrical cavities after filling each end with grout. A solid one way slab can be used (# 17). Or in a two way loading slab (# 19) when the load is distributed on all four walls.

Figure # 214 The various wall panels, both pre-cast and composite are grouped in one sheet with possible permutations. Note that the"T"pre-cast section (#4) used as the top component in an internal wall, can also be used as an external joint whereby a room is made of four such joints with the center portion s of the walls and slabs poured in place by means of steel forms.

Figure # 3/4 The various slab sections are all put in one sheet showing possible permutations.

Figure # 4/4 Four panels each at right angles to the next forming a room (# 6) with tapered ends on each side of the wall panels and protruding steel and a stepped down slab (as in the previous cases).