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Title:
KIT AND METHOD FOR THE CONSTRUCTION OF A WOODEN BUILDING FRAME
Document Type and Number:
WIPO Patent Application WO/2020/212212
Kind Code:
A1
Abstract:
The invention relates to a kit for the construction of a wooden building frame, the kit comprising a plurality of identical wooden columns and beams, which comprise connecting elements that are matched such that the columns and beams can be appropriately connected for the construction of the wooden building frame by a form-locking connection of the connecting elements. The invention further relates to a method for providing such a kit and a method for the construction of building frames under use of such a kit.

Inventors:
ACLER ERMANNO (IT)
Application Number:
EP2020/059966
Publication Date:
October 22, 2020
Filing Date:
April 08, 2020
Export Citation:
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Assignee:
BINDER BETEILIGUNGS AG (AT)
HOLZPAK LLC (US)
International Classes:
E04B1/26; E04B5/12
Domestic Patent References:
WO2018000019A12018-01-04
Foreign References:
KR101906499B12018-10-10
JPH06173343A1994-06-21
Attorney, Agent or Firm:
HERRMANN, Uwe (DE)
Download PDF:
Claims:
Claims

1. Kit for the construction of a wooden building frame, characterized in that the kit comprises a plurality of identical wooden columns and beams, which comprise connecting elements that are matched such that the columns and beams can be appropriately connected for the construction of the wooden building frame by a form-locking connection of the connecting elements.

2. Kit according to claim 1 , characterized in that corresponding non-wooden connecting elements of the columns and beams comprise corresponding bores and threaded pins, which are matched in such way that that the col umns and beams can appropriately be connected for the construction of the building frame exclusively by tightening nuts on the threaded pins inserted through the bores.

3. Kit according to any preceding claim, characterized in that the kit comprises at least one type columns and at least two types of beams, wherein:

the columns comprise connecting elements for connection with other components of the kit on their upper ends, and which comprise different con necting elements on their lower ends, which are suitable for connection with the connecting elements arranged on the upper ends of other identical col umns;

one type of beams are longitudinal beams, which comprise, preferably identically on either end, connecting elements suitable for connection with the connecting elements arranged on the upper ends of the columns; and another type of beams are cross beams, which likewise comprise, preferably identically on either end, connecting elements suitable for connec tion with the connecting elements arranged on the upper ends of the col umns.

4. Kit according to claim 1 , characterized in that the columns comprise a col umn fitting on their upper ends, which is box-shaped and comprises a base plate and four side walls, together defining an upwardly open accommodat ing space, with a number of bores being provided in each of the side walls.

5. Kit according to claim 4, characterized in that on their lower ends taper in at least one discrete step to form an essentially cuboid foot portion, which ex tends in a downward direction.

6. Kit according to claim 4 or 5, characterized in that the beams comprise, at least on one end, a beam fitting in the form of an elongated plate, which lies flat on the outer face of the respective beam end and has an appendix por tion extending beyond the cross-section of the beam on one side, the ap pendix portion comprising at least two bores. 7. Kit according to claim 6, characterized in that the side walls of the column fitting comprise in their upper edges a notch per one pair of bores, the through of each notch being positioned half way between the bores of the corresponding bore pair, and in that the beam fittings comprise an axial nose that is positioned half way between a pair of bores of the appendix portion.

8. Kit according to claim 6 or 7, characterized in that the plate is inserted into a recess at the outer face of the respective beam end and/or fixed to the outer face by screws that are driven into the beam through bores of the plate.

9. Kit according to any one of claims 3-8, characterized in that the kit compris es, as a further beam type, supplementary cross beams, which comprise, preferably identically on either end, connecting elements that are different from the connecting elements of the longitudinal beams and cross beams.

10. Kit according to any one of claims 3-9, characterized in that the kit comprises a plurality of columns and beams of every type.

11. Kit according to any one of claims 3-10, characterized in that the kit further comprises end pieces, which are cuboid and preferably wooden pieces, which do not comprise connecting elements on their upper ends, and which on their lower ends comprise either connecting elements as described in claim 3 for the lower ends of the columns, or foot portions as described for the lower ends of the columns in claim 5.

12. Kit according to any preceding claim, characterized in that the columns, beams and, optionally, end pieces are formed from glulam or plywood.

13. Method for providing a kit according to any one of claims 1 -12, characterized in that all components of the kit, preferably including the fittings, are fully prefabri cated at one or more production sites and then shipped to a construction site remote from the one or more production sites.

14. Method for the construction of building frames under use of a kit according to any one of claims 1 -12, characterized in that the connecting elements of the columns and beams of the kit are form- lockingly connected.

15. Method according to claim 14, characterized in that the building frame is a building frame having several levels, preferably at least five levels and more preferably at least eight levels.

Description:
Kit and method for the construction of a wooden building frame

The invention relates to a kit for the construction of wooden building frames, which comprises a plurality of columns and beams having specific connecting elements. The invention further relates to a method for providing such a kit and to a method for the construction of building frames under use of such a kit.

In the construction of so-called mid-high-rise buildings, wood is hardly used at the moment. One reason for this is that construction companies active in the construc tion of mid-high-rise buildings are focused on steel construction and frequently have little experience in dealing with wood.

The problem underlying the invention is the provision of a technical concept, which renders the construction of wooden building frames more accessible to a broad market and allows a fast on-site assembly, not only but especially in the mid-high- rise building sector. Against this background the invention relates to a kit for the construction of a wood en building frame comprising a plurality of wooden columns and beams, which comprise non-wooden, preferably metallic connecting elements that are matched such that the columns and beams can be appropriately connected for the construc tion of the wooden building frame exclusively by a form-locking connection of the connecting elements.

The wooden components can be shipped to a construction site as prefabricated elements and easily assembled on-site without requiring specific knowledge in the handling and connection of wooden components. It is sufficient to provide a form locking connection between the preferably metallic connecting elements in a prede termined manner. The wooden building frames may hence be modularly assembled without using woodworking tools.

The beams and columns may be identical in a preferred embodiment, or at least identical in all their properties with only one or a certain small number of exceptions. For example, columns could have different lengths but be otherwise identical.

In one embodiment, corresponding non-wooden connecting elements of the col umns and beams comprise corresponding bores and threaded pins, which are matched in such way that that the columns and beams can appropriately be con nected for the construction of the building frame exclusively by tightening nuts on the threaded pins inserted through the bores.

For example, the non-wooden and preferably metallic connecting elements on the upper ends of the columns may comprise axially protruding threaded pins. The pins may, for example, project from an end plate that is oriented perpendicular to the axis and attached to the upper end face of the column.

In addition, the non-wooden and preferably metallic connecting elements of the beams may, for example, comprise support plates projecting in an axial plane and having bores at intervals corresponding to intervals between a subgroup of the pins. The connection of a beam to the upper end of a column can in this case be formed by applying the support plate to the upper end of the column in such way that the respective subgroup of pins protrudes through the bores, and by subsequently ap plying and fastening nuts to the threaded pins.

Further, the non-wooden and preferably metallic connecting elements on the lower ends of the columns may, for example, comprise axial bores at positions corre sponding to the positions of the threaded pins on the connecting elements on the upper ends of the columns. The bores may be worked into an end plate that is ori ented perpendicular to the axis and attached to the lower end face of the column. The end plate may comprise two types of bores, namely wide bores suitable to also take in nuts attached to the pins and narrow bores having a diameter corresponding essentially to the outer diameter of the threaded pins. The wide bores may be con tinued as bores in the column underneath the end plate. Underneath the narrow bores the column may comprise laterally accessible recesses. The connection of a further column to the upper end of a column can in this case be formed by applying the further column to the upper end of the existing column in such way that the threaded pins are inserted through the bores, some through the wide bores when having nuts attached and some through the narrow bores without having nuts at tached, and subsequently nuts are attached and fastened, by lateral access to the recesses, to the threaded pins previously inserted through the narrow bores without having nuts attached.

The connection between the wooden columns or beams and the associated con necting elements can in one embodiment, at least for a part of the columns or beams, or at least on one end of these columns or beams, likewise be form-locking. For example, perforated webs of the connecting elements may be inserted into axi ally extending slits of the wooden columns or beams and fixed by pins extending in transverse direction through the perforations of the webs and corresponding bores in the wooden column or beam. Such stable form-locking connection may in par ticular be suitable for attachment of the connecting elements to beams, because these have to withstand strong tractive and transverse forces in the building frame. Alternatively or additionally, the connection between the wooden columns or beams and the associated non-wooden and preferably metallic connecting elements can in one embodiment, at least for a part of the columns or beams, or at least on one end of these columns or beams, be force-locking, for example by gluing. A mere force locking connection, however, may primarily be suitable for attaching the connecting elements to the columns, because these are more or less exposed to compressive forces only in the building frame.

In one embodiment, the kit comprises at least one type of columns and at least two types of beams.

The columns comprise connecting elements for connection with other components of the kit on their upper ends, and which comprise different connecting elements on their lower ends, which are suitable for connection with the connecting elements arranged on the upper ends of other identical columns.

One type of beams are longitudinal beams, which comprise, preferably identically on either end, connecting elements suitable for connection with the connecting el ements arranged on the upper ends of the columns.

Another type of beams are cross beams, which likewise comprise, preferably iden tically on either end, connecting elements suitable for connection with the connect ing elements arranged on the upper ends of the columns.

The preferably identical connecting elements on either side of the beams simplify assembly. The cross beams of the kit, in one embodiment, are all of the same length. The same, in one embodiment, applies to the longitudinal beams of the kit. Typically, the longitudinal beams are longer than the cross beams.

In one embodiment the columns comprise a column fitting on their upper ends, which is box-shaped and comprises a base plate and four side walls, together de- fining an upwardly open accommodating space. A number of bores is provided in each of the side walls. The fitting, for example, can be made of metal. On the lower ends, the columns can taper in at least one discrete step to form an essentially cu boid foot portion, which extends in a downward direction.

The beams may comprise, at least on one end, a beam fitting in the form of an elongated plate, which is, for example, metal made. The plate lies flat on the outer face of the respective beam end and has an appendix portion extending beyond the cross-section of the beam on one side. On the appendix portion, there are prefera bly at least two bores for driving screws or bolts through them. The plate can be inserted into a recess at the outer face of the respective beam end and/or be fixed to the outer face by screws that are driven into the beam through bores of the plate. The screws are preferably oriented in a direction oblique to the longitudinal axis of the beam.

In a preferred variant of the embodiment discussed in the two preceding para graphs, the side walls of the column fitting comprise in their upper edges a notch per one pair of bores, the through of each notch being positioned half way between the bores of the corresponding bore pair. The beam fittings, correspondingly, com prise an axial nose that is positioned half way between a pair of bores of the ap pendix portion. The position of the nose relative to the bores of the appendix portion is identical to the position of the notch through relative to the bores of the beam fit ting. This enables hanging in the beams to the columns by hanging in the noses into the notches before fixing by screwing of bolting together through the bores and, which makes holding the beams in the correct position at the construction site much easier.

In one embodiment the kit comprises, as a further beam type, supplementary cross beams, which comprise, preferably identically on either end, non-wooden and pref erably metallic connecting elements that are different from the connecting elements of the beams. The supplementary cross beams are typically of the same length as beams intended for extending transversally on the frame, e.g. the cross beams, and are intended to be mounted at intervals of the beams intended for extending longi tudinally on the frame, e.g. longitudinal beams. For this reason, the beams intended for extending transversally on the frame, e.g. longitudinal beams may comprise ra dial mounting recesses in at least one and optionally at a plurality of longitudinal positions, which are preferably arranged at regular intervals. The connecting ele ments of the supplementary cross beams may comprise support plates. These support plates may be inserted into the mounting recesses.

In one variant, a plate having radially protruding threaded pins may be laid into the mounting recesses, either by factory-fitting or subsequent fitting, and the support plate of the connecting elements of the supplementary cross beams may comprise bores at positions corresponding to the positions of the threaded pins. In such case, the supplementary cross beams may be connected to the beams intended for ex tending transversally on the frame, e.g. the longitudinal beams by inserting the sup port plates of the connecting elements of the supplementary cross beams into the mounting recesses of the beams intended for extending transversally on the frame, e.g. the longitudinal beams in such way that the threaded pins protrude through the bores, and by subsequently applying and fastening nuts to the threaded pins.

Preferably, the kit comprises a plurality of columns and beams of every type identi fied above.

In one embodiment the kit further comprises end pieces, which are cuboid and preferably wooden pieces, which do not comprise connecting elements on their up per ends, and which on their lower ends comprise either non-wooden and prefera bly metallic connecting elements preferably identical to the connecting elements on the lower ends of the columns, or foot portions identical to the foot portions sitting on the lower ends of the columns according to the further presented embodiment. At the uppermost level of the building frame, these end pieces may be superim posed to an existing column instead of another column. When reference is herein made to identical connecting elements, it is understood that these are functionally identical or identical with regard to the connective means. Under aspects that are unimportant to the function, for example material, branding or the like, they may be different, even if such is not preferable under unity aspects of the kit components.

In one embodiment the columns, beams and, optionally, end pieces are formed from glulam or plywood. The specific lamination of the individual boards in such components leads to a high stability of the columns and beams.

The invention further relates to a method for providing a kit according to the inven tion, wherein all components of the kit, be it with or without the fittings, are fully pre fabricated at one or more production sites and then shipped to a construction site remote from the one or more production sites.

In a preferred variant all components may be prefabricated in one and the same production site, but in an alternative variant the production may be distributed over a number of production sites. The components may then be loaded, for example, into a container. The transport can be carried out by truck, train and/or ship.

When reference is made herein to a full prefabrication, it is intended to describe a prefabrication of the kit components as they are described above, namely as col umns, beams etc. including the associated connecting elements.

The respective method makes use of the possibility to deliver prefabricated wood- based components to a construction site, which can then easily be assembled on site without requiring specific knowledge in the handling and connection of wooden components.

The invention still further relates to a method, carried out on a construction site, for the construction of building frames under use of a kit according to the invention, wherein the connecting elements of the columns and beams of the kit are form- locking connected. Details regarding the connection types and the composition of the columns, beams and optionally further components of the kit are given in the above description of the kit.

It may in particular be provided that building frame is a building frame having sever al levels, preferably at least five levels and more preferably at least eight levels. Owing to their design, the kit and method according to the invention are suitable, not only but especially, for the construction of so-called mid-high-rise buildings hav ing, for example, five to twenty and preferably eight to eighteen levels.

Further details and advantages of the invention can be gathered from the example that is described in the following by reference to the figures. The figures show:

Figures 1 a-1 c: two basic components of a kit according to one embodiment of the invention;

Figures 2a-2h: a process of connecting these three basic components; Figures 3a-3c: a process of connecting a further component of the kit; Figures 4a-4d: processes to form top and side ends; Figures 5a-5c: two basic components of a kit according to a second embodi ment of the invention;

Figures 6a-6g: a process of connecting these two basic components; Figures 7a-7e: a variant of the second embodiment;

Figure 8: a schematic illustration of the loading the components of the kit to a container; and Figures 9a-9c: a process for constructing a building frame using the compo nents shown in figures 5a-5c.

Figures 1 a-1 c show two basic components of an inventive kit for the construction of wooden building frames. The basic components comprise columns 10, which are shown in figure 1 a at their tops and in figure 1 c at their bottoms, and beams 20 shown in figure 1 b. There may be longitudinal beams and cross beams that can be identical, except possible their length.

Figure 1 a shows the upper end of a column 10. The column 10 is fabricated from glulam and comprises an essentially square cross-section. A metallic upper end plate 11 sits on the upper end face of the column 10, which comprises a plurality of threaded pins 12 projecting upwards in a radial direction, i.e. away from the column 10. The threaded pins 12 are distributed around the circumference of the cross- sectional area and fixed to the upper end plate 11 in that the lower ends sit in cor responding bores 13 of the upper end plate 11.

The upper end plate 11 and its threaded pins 12 are intended for connection to oth er components of the kit, as will be explained in the following with reference to fig ures 2a-2h.

Figure 1 b shows one end of a beam 20, which is likewise a rod-shaped glulam component. The cross-section is, however, rectangular, the width of the beam 20 being approximately half of the width of the column 10. A metallic beam fitting 21 sits on the illustrated end face of the beam 20. For fixing purposes the beam fitting 21 comprises, on its back side, two vertically extending webs 22 which are inserted to corresponding slits 23 at the end face of the beam 20, where both the webs 22 and the beam 20 comprise corresponding transversal bores 24 and 25 with holding pins 26 extending there through. The main plate 27 of the beam fitting 21 extends parallel to the end face of the beam 20 and is inserted into a recess 27a. The beam fitting 21 comprises, as a key functional element located at approximately half height, a support plate 28 which is secured from above by two vertical webs 29. The support plate 28 comprises three bores 28a at intervals corresponding to the intervals of three threaded pins 12 t the upper end of a column 10.

The beam fittings 21 are intended for connection to other components of the kit, as will be explained in the following with reference to figures 2a-2h.

Figure 1 b shows the lower end of a column 10, whose design on the upper end has already been discussed in conjunction with figure 1 a. A metallic lower end plate 14 sits on and essentially fully covers the lower end face of the column 10 and com prises a plurality of bores 15, which continue in the wooden part of the column 10. The number and position of the bores 15 corresponds to the number and position of the threaded pins 12 of the upper end plate 11 of the column 10. Among the bores 15, the four corner bores have a smaller diameter than the remaining bores. The lower end plate 14 and the adjacent wooden part of the column 10 further comprise lateral incisions 16. At each of the four corners directly adjacent to the lower end plate 14, recesses 17 are machined into the wooden parts of the columns, which are open both downwards and sideward.

Figures 2a-2h show a process of connecting these basic components.

In a first step, which is illustrated in figures 2a-2c, a total of four beams 20 are con nected to the upper end of a column 10. As shown in figure 2a, the support plate 28 of the beam fitting 21 of a first beam 20 is thereby applied to the upper end plate 11 of the column 10 such that some threaded pins 12 at the upper end of the column 10 protrude through corresponding bores 28a of the support plate 28. Washers and nuts 71 are applied to the threaded pins to fasten the connection, where the outer most pin, however, remains idle. Three further beams 20 are longitudinally con nected to the upper end of the column 10 in an identical manner, as shown in fig ures 2b-2c. In a second step, which is illustrated in figures 2d-2e, two further beams 20, which may be of a different length, are connected to the upper end of the same column 10 in an essentially identical manner.

In a third step, which is illustrated in figures 2f-2h, a further column 10 is inserted and fixed in the space which is axially aligned to the lower column 10 and confined by the end faces of the beams 20. The bores 14 of the upper column 10 thereby receive the threaded pins 12 of the lower column 10, including nuts 71 , where ap plicable. The pins 12, to which a nut was not applied during the process of figures 2a-2c and whose corresponding bores 15 in the lower end plate 14 have a smaller diameter, now receive nuts 71 through the recesses 17 after the upper column 10 has already been fully associated to the lower column 10.

The final state of a crossing formed from a lower column 10, an upper column 10 and a total of four longitudinal beams 20 and two cross beams 20 is shown in figure 2h.

Figures 3a-3c show a process of connecting the supplementary beam 50, which could be cross or longitudinal, to a frame formed from the columns 10 and beams 20. The supplementary beams 50 are generally configured in a similar manner as the beams 20, only the support plate 58 is even with the top side of the beam 50.

In a first step, which is shown in figure 3a, intermediate fittings 32 having a total of four vertically protruding threaded pins 33 are inserted to mounting recesses 31 on the upper face of two adjacent beams 20.

As shown in figure 3b, once the supplementary fittings 32 have been attached, a supplementary beam 50 is fitted, with the support plate 58 of its supplementary beam fitting 51 , to the intermediate fitting 32 such that pins 33 protrude through two corresponding bores in the support plate. . Again, washers and nuts 71 are applied to fasten the connection. A further supplementary beam 50 is connected to the other side of the beams 20 in an identical manner, as shown in figure 3c.

In the discussion of figures 1 -3 to this point, the connection between the columns 10, beams 20 and supplementary beams 50 has been explained without considera tion of the situation at the top and side ends of a frame. The situation at the top end shall now be explained in figure 4a and the situation at the side ends in figures 4b- 4d.

As shown in figure 4a, at the top end of the frame a further column 10 shall be re placed by an end piece 60, which instead of a further column 10 shall, in a manner as illustrated in detail in figures 2f-2h, be inserted and fixed in the space which is axially aligned to the column 10 and confined by the end faces of the beams 20. The end piece 60 comprises a lower end plate 64, which is identical to the lower end plate 14 of the columns 10. The vertical extension of the end piece 60 is such that its upper face is at level with the upper faces of the adjacent beams 20.

As shown in figure 4a, at the longitudinal side of the overall frame a beam 20 shall be omitted at one side of the column 10. As further shown in figure 4c, at the broadside of the overall frame one pair of beams 20 shall be omitted at one side of the column 10. Lastly, as shown in figure 4d, at the corners of the overall frame one pair of beams 20 shall be omitted on two adjacent sides of the column 10. Corre sponding fractions of the threaded pins 12 at the upper end plates 11 of the col umns 10 are likewise missing at all three respective positions. The same may apply to corresponding bores 15 at the upper column 10 and their lower end plate 14.

Figures 5a-5c show two basic components of another kit according to the invention. The basic components comprise a column 110 whose lower end is shown in figure 5a and whose upper end is shown in figure 5b, and a beam 120 which is shown in figure 5c. Figure 5a illustrates the upper end of a column 110, which is a pole-shaped glulam component having an essentially square cross-section. On its upper end the col umn 110 comprises a column fitting 111 made from metal. The fitting 111 is box shaped and comprises a base plate 113 and four side walls 114, together defining an upwardly open accommodating space 112. The fitting 111 is fixed to the column end face by screws 115 that pass through bores 116 in its base plate 113. A num ber of pairs of bores 117 is also provided in each of the side walls 114 of the fitting 111 for connecting with other components of the kit, as will be explained in more detail below. Each pair of bores 117 serves to connect to a beam fitting 121 , as de scribed later in connection with Figure 5c. Two opposing sides of the column fitting 111 comprise two adjacent pairs of bores 117 for connecting to two column fittings 121 , while the other opposing sides of the column fitting 111 comprise one central pair of bores 117 for connecting to one column fittings 121.

Figure 5b illustrates the lower end of column 110, where the column 110 tapers in two discrete steps to form an essentially cuboid foot portion 118 extending in a downward direction. The foot portion 118 is dimensioned to fit exactly into the ac commodating space 112 of an upper fitting 111 , as shown in Figure 5a, of a column 110 of a lower level of the building frame, as described in more detail below.

Figure 5c illustrates one end of a beam 120, which is a lengthy glulam component of rectangular cross-section. At each of its ends, the beam 120 comprises a beam fitting 121 in the form of an elongated metal plate, which lies flat in a recess 122 at the outer face of the respective beam end and fixed to the outer face by screws 123 that are driven through bores 124 of the fitting 121 and oriented obliquely to the axis of the beam 120. An appendix portion 121 a of the plate-shaped fitting extends lat erally beyond the cross-section of the beam 120 on one side thereof. The appendix portion 121 a comprises bores 125 for connecting the beam 120 to other compo nents of the kit, as will be further explained below.

The fittings 121 and 111 each could be attached to the beams 120 and columns 110 at the manufacturing site or at the building site. Figures 6a-6g illustrate a process of connecting the two basic components shown in figures 5a-5c.

In a first step, as illustrated in Figures 6a-6c, a total of four beams 120, that are in tended to extend in a longitudinal direction in the final frame, are connected to the top of a column 110, one pair of adjacent beams 120 each on opposite sides of the column 110.

For mounting the first beam 120, as shown in figure 6a, the beam 120 is horizontal ly oriented and made to approach the upper end of the vertically oriented column

110 from the side, with its plate-shaped beam fitting 121 head first, until the beam fitting 121 touches the column fitting 111. The relative positioning of beam 120 and column 110 is such that the bores 125 on the appendix portion 121 a of the beam fitting 121 and the bores 117 in the side walls 114 of the column fitting 111 are aligned. The bores 117 in the side walls 114 of the column fitting 111 are positioned such that the bores 125 and 117 are aligned when the beam 120 does not branch off centrally but laterally offset from the respective side of column 110. In this posi tion, the column 110 and the beam 120 are then connected by placing and fixing bolts 180 in the aligned bores 125 and 117.

A further beam 120 is connected to an idle mounting position on the column fitting

111 directly adjacent to the mounting position for the first beam 120, as shown in Figure 6b. Another pair of beams 120 is connected to the opposite side of column 110 in exactly the same manner, as shown in Figure 6c.

In a second step, shown in figures 6d-6e, two further beams 120, that are intended to extend in a transverse direction in the final frame, are connected to the top of the column 110, one beam 120 each on each of the still idle opposite sides of the col umn 110. The connection of the transversally extending beams is carried out in an essentially identical manner as described above for the longitudinally extending beams 120, with the only difference that the transversally extending beams 120 branch off cen trally from the respective sides of column 110. The bores 117 in the respective side walls 114 of the column fitting 111 are positioned accordingly.

In a third step, which is shown in figures 6f-6g, a further column 110 (of the next level in the building frame) is superimposed on the existing column 110 (of the ex isting / lower level in the building frame) by inserting its foot portion 118 to the ac commodating space 112 of the upper fitting 111. The foot portion 118 is then fixed by driving screws 190 laterally into the foot from each side through appropriate bores in the side walls 114 of the column fitting 111.

Apart from the differences in the connectivity and fittings of the columns 110 and beams 120, when it comes to forming top and side ends, reference can analogously be made to figure 4.

The embodiment illustrated in figures 5-6 requires, relative to the embodiment of figures 1 -4, less prefabrication work and the fittings are less complex and error- prone. The assembly at the construction site, on the other hand, is slightly more complex, in particular since the beams 120 have to be held in position with a crane during the mounting to the column 110. This can be accommodated with modern cranes and experienced crane operators, however.

Figures 7a-7e show a variant of the embodiment illustrated in figures 5-6, which facilitates easier assembly at the construction site.

Specifically, as apparent from Figure 7a, the side walls 114 of the column fitting 111 comprise in their upper edges a notch 119 per each pair of bores 117, the through of each notch 119 being positioned half way between the bores 117 of the corre sponding bore pair. Now turning to Figure 7b, the beam fittings 121 , correspondingly, comprise an axial nose 129 that is positioned half way between the bores 125 of the uppermost bore pair of the fitting 121. The position of the nose 129 relative to the bores 125 is iden tical to the position of the notch through relative to the bores 117.

This enables hanging in the beams 120 to the columns 110 by hanging in the noses 129 into the notches 119 before fixing by bolting together through the bores 117 and 125, which makes holding the correct position much easier. The respective process is illustrated in Figures 7c-7e.

Figure 8 symbolically shows how a complete inventive kit of components for the construction of a building frame, which especially comprises a plurality of columns 10, beams 20, supplementary beams 50 and end pieces 60, is prefabricated at a production facility and then in its entirety loaded to one or more containers (not shown) for transportation to a construction site via truck, train and, as the case may be, also ship.

The inventively designed columns 110 and beams 20 can be used for the construc tion of a building frame at a construction site.

In a first step, a plurality of columns 110 are installed on a concrete foundation at predetermined positions and at regular intervals.

Subsequently, longitudinal beams 120 are mounted to these columns 110 in a fash ion as explained in detail in connection with the description of figures 6a-6c. The longitudinal beams 120 could optionally be equipped with supplementary fittings, as explained in connection with the description of figures 3a-3c.

In a further step, cross beams 120 are mounted to the columns 110 in a fashion as explained in detail in connection with the description of figures 6d-6e. At the sides and corners of the frame the procedure is, in principle, as explained in connection with figures 4b-4d for the other embodiment.

In an optional further step, supplementary cross beams are mounted to the longitu dinal beams 120 in a fashion as explained in connection with the description of fig ures 3a-3c.

Columns 110 of a higher level are then mounted to the frame in a manner as illus trated in figures 6f-6g.

To complete the construction of a level of the building frame, floor boards 100 are laid onto the beams 120 in lengthwise direction. This step is illustrated in figures 9a- 9c. The floor boards have cutouts at positions corresponding to the columns 110.

At the uppermost level, instead of higher level columns 110, end pieces are mount ed to the fittings 110.