CA1085132A

CA1085132A - Cantilivered cross truss construction

Info

Publication number: CA1085132A
Application number: CA308,422A
Authority: CA
Inventors: Bertram Zusman
Original assignee: Individual
Current assignee: Individual
Priority date: 1978-07-31
Filing date: 1978-07-31
Publication date: 1980-09-09

Abstract

ABSTRACT OF THE DISCLOSURE
A cantilevered cross truss construction having several pairs of crossed horizontally disposed truss members, each truss member including vertically spaced top and bottom chord members and interconnecting web members, one of each pair of truss members being of a greater height than the other so that one truss member of each pair passes through an opening in the other, reinforcing members longitudinally of said other truss member so as to increase the height thereof to that of said higher truss member. This inven-tion is distinguishable from others by reason of the pairs of crossed truss members forming a central area from which the ends of the truss members extend In cantiliver form to provide a wide stable support structure.

Description

~ 32 Background of the Invention (1) Field of the Invention~
This invention relates to load supportlng structures of a truss configuratlon.

(2) Description of the Prior Art:
Prior structures of this type have utillzecl truss construction for integral load supporting assemblies. See for example U.S. Patent 1,911,018, to W. L. Goeltz of May 23, 1933, U.S. Patent 3,l~10,036 to F. Brell of Nov. 12, lg68 and U.S. Patent 3,477,189 to K.J.W. Merson of Nov. 11, 1969.

In U.S. Patent 1,911,018 a plurality of different shaped truss chords all having the same height are disclosed and we1ded to one another at each truss intersection forming a box-like support structure.
In the present invention a cantilivered cross truss system is ~;
dtsclosed having similar trusses of different heights forming an open ended cantiliver system.
In U.S. Patent 3,~10,036 a multi-purpose roof structure is disclosed formed of elongated bridge members with chord members all of the samF
height supported by hydraulic means.

In the present invention a cross truss system is disclosed havTng pairs of truss members of two different heights, one placed inside the other for a cantilivered support system secured by a~series of reinforcing and spacing tie-downs to a foundation wall.
In U.S. Patent 3,477,1~9, a load supporting structure is disclosed comprising two series of interlocking trusses wherein one truss member ~, has a series of gaps in the upper chord so that the other truss can be Iowered into the sameand locked in place by a spectal bracket fitted on the top chord of the second truss.

28 In the present invention two truss members with uninterupted , .

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5~L32 upper ancl lower chorcls are placed at right angles tlllough one another achieving a self-supporting cantilivered structure in a cross shape.
Summary of the Invention A cantiliverecl cross eruss construction wherein a series of pairs of two different sized truss members are placecl at right angles, one within the othcr, forming a spaced selF-supporting eruss construction whose encls are cantilivered extending past the foundaeion walls. The eruss members are preferably made of wood.

Description of the Drawings Figure 1 is a top plan view of the cantilivered cross truss construction;
Figure 2 is an enlarged perspeceive view of a portion of the truss construction;
Figure 3 is a section on line 3-3 of Figure 2;
Figure 4 is a section on line 4-4 of Figure 2.
Description of the Preferred Embodiment Referring to Figures 1 and 2 of the drawings, a cantilivered cross truss construction 10 is shown comprising multiple truss members 11A
and llB, 12A and 12B, a plurality of tie-down straps 13 and a foundation wall 14.
Referring now to Figure 2 oF the drawings, an enlarged portion of the truss construction 10 can be seen wherein the truss members llA and llB9 12A and 12B have upper and lower chords 15 and 16 with a plurality o-f chord connecting web members 17 that run alternately from each chord ~ember 15 and 16 in an angular pattern. Truss members llA and 11B have a series of vertical chord connecting members 18, pairs of which form vertical openings 19 between the angularly running chord connecting web members 17.

28 The truss members 12A and 12B are of a height so that they can be positioned 3~ ~

through the vert;cal open;ngs 19 in the truss members 11A and llB at each location where the trusses llA and 11B cross the trusses 12A and 12B.
As shown in Figure 3 of the drawings, the lower chord 16 of the truss member llA is secured to a plate 20 by the tie-down strap 13. An anchor rod 2t runs through the plate 20 into the foundation wall 14 which is reinforced with concrete 22.
In Figure 4 of the drawings, the lower chord 16 of the truss member 12A is secured to the plate 20 and a reinforcing spacer plate 23 by the tie-down strap l3. The plate 20 is secured to the foundation wall 14 by an anchor rod 21 that extends down into concrete 22 in the foundation walt 14.
tn Figures 2 and 4 of the drawings it will be seen that the truss member 12A includes the spacer plates 22 and 23 and a filler strip 24 to compensate for the vertical height differential between the truss members 12A and llA. The spacer plates 22 and 23 also reinforce the chords of the truss.
It will thus be seen that the cantilevered self~supporting construc-tion is achieved by the interlacing of the basic truss members llA and llB
and 12A and 12B.
Referring to Figure 1 of the drawings, it will be seen that the truss members llB and 12B are preferably made of three separate truss 2û units formed of two by fours joined together to form a basic cross support across the foundation wall 14. The tie-down straps 13 are placed on either side of the truss intersections along the perimeter of the foundation wall 14 to help secure the cantilevered truss construction 10 to the foundation wall 14. The truss members 12A and 12B are preferably made of two separate truss un;ts formed of two by fours joined together.
It will thus be seen that a new and novel cross truss construction ~ -has been disclosed which can be simply and inexpensively built to form a 28 self-supporting cantilevered structure allowing greater utilization of ;3L3~

buiIding materials and a shortened building time. The strucLure is parti-cularly useful in peclestal homes and like.
Although but one embodiment of the present invention has been illustrated and described, it will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the spirit of the invention and having thus describecd my 7 invention what I claim is:

Claims

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A load supporting cantilevered cross truss construction com-prising several pairs of crossed horizontally disposed truss members, each truss member including vertically spaced continuous top and bottom chord members and interconnecting web members, one of each pair of truss members being of a greater height than the other so that one truss member of each pair passes through an opening between the web members in the other, reinforcing members longitudinally of said other truss members so as to increase the height thereof to that of said higher truss members and means for securing said cross truss members to a founda-tion inwardly of the ends of said crossed truss members.

2. The load supporting cantilevered cross truss construction of Claim 1 and wherein the cross truss members are made of several individual trusses secured to one another in side by side relation.

3. The load supporting cantilevered cross truss construction of Claim 1 and wherein most of said interconnecting web members are angularly disposed between the top and bottom chord members and several of said web members are arranged in horizontally spaced pairs to form said openings.

4. The load supporting cantilevered cross truss construction of Claim 2 wherein said reinforcing members join said continuous chord mem-bers and are fastened thereto.