Braced timber trusses

Inactive Publication Date: 2006-07-20
BENTON SCOTT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006] It is an object of this invention to provide a stable support means in the form of a parallel chord truss

Problems solved by technology

A disadvantage however is in the quality of the wood required, as for long spans it may be necessary to use hard woods which are quite costly when compared with soft woods and laminates which are used in other truss type members.
Clearly use of the latter type of truss prohibits the possibility of cabling or any other services being able to pass through the truss as it is not possible to pierce the longitudinal sheet without adversely affecting the structural integrity of the truss.
Although this type of truss is less expensive than that previously described its limitations are clear.

Method used

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  • Braced timber trusses
  • Braced timber trusses
  • Braced timber trusses

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0020] In the invention (FIG. 3) a chord truss 10 is provided in which the longitudinal chord members 11 and 12 are manufactured from a plywood laminate material.

[0021] The interior faces of the chord members 14 and 15 are grooved 16 to accept a spacing sheet 20 of wood particle board or fibreboard which is able to be cut with a hole saw or the like to permit other materials such as ducting and electrical cabling to pass through apertures 30 in the truss 10.

[0022] Such excision of apertures in the truss would as a general rule significantly reduce the overall strength of the truss however the truss of the invention is provided with bracing members 40 passing between the chords in the form of diagonally oriented multi toothed nail plate connectors which connect between opposing chords. These bracing members can be generally unitary 40 or singular 50 depending on the particular application.

[0023] In this embodiment of the invention diagonal supports are used to maximise the strength...

second embodiment

[0027] In the invention (FIG. 4) there is a discontinuity in the truss of the invention below an upper chord 11 which permits it to be located over a steel beam 60 such that it is concealed by the support chord 11.

third embodiment

[0028] In the invention two chord trusses in accordance with the invention abut a steel beam 60 and are supported on an interior lower face of the beam. At either side of this junction bracing members 50 strengthen each chord truss at this point.

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Abstract

A parallel chord truss includes elongate lateral chord members of which at least one chord member is continuous along the length of the parallel chord truss in a fixed engagement with a penetrable separating member or web. Lateral chord members are cross-braced for permitting access to a penetrable separating member for allowing cabling, and the like, to pass through apertures in the penetrable separating member.

Description

TECHNICAL AREA [0001] This invention relates to the area of building construction and in particular to the area of the use of parallel chorded trusses such as are commonly used for supporting floors and internal walls and the like. BACKGROUND TO THE INVENTION [0002] It is well known for parallel chorded trusses to be used as long span floor joists among other applications. These generally comprise wooden horizontal members separated and connected by cross-bracing multi toothed nail plate connector members. [0003] The advantage of such trusses is that they provide good access between the cross members for facilities such as plumbing, electrical services and air conditioning ducts and the like. A disadvantage however is in the quality of the wood required, as for long spans it may be necessary to use hard woods which are quite costly when compared with soft woods and laminates which are used in other truss type members. [0004] The alternative is to use laminated plywoods as the wooden...

Claims

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Application Information

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IPC IPC(8): E04C3/02E04C3/14E04C3/16E04C3/18E04C3/292
CPCE04C3/14E04C3/16E04C3/18E04C3/292E04C2003/026
Inventor BENTON, SCOTT
Owner BENTON SCOTT
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