Wood Parallel Chord Truss Detail For Flat Roof

Or close to it in odd panel.

Wood parallel chord truss detail for flat roof.

Valleys and piggyback trusses must have verticals 4 o c. Limit number of girder plies to 5. The chord size and web configuration are determined by span load and spacing. Urated assemblies with parallel chord trusses in floor ceiling applications may also be used for roof ceiling applications as long as the minimum depth at end bearing is maintained.

Spacing of trusses are center to center in inches. These steel joints are needed to support the overall truss. Pct abbreviation for parallel chord truss the truss plate institute tpi specification designation for trusses with parallel chords and 4x2 chord orientation titled design specification for metal plate connected parallel chord 4x2 wood trusses. Ueven if insulation is specified as an element of the assembly it does not have to be installed to meet the intent of the assembly.

Sloping top chord howe configuration floor truss system 42 modified warren configuration mono trusses scissors mono mono parts of a truss framed roof gable end valley set gi rde t u s dutch hip girder dutch hip framing stepdown hip framing end jack stepdown girder stepdown truss c om n truss 2141 james d hagood halifax va 24558. Center line chase 24 max. Overhang the extension of the top chord of a truss beyond the heel measured horizontally. Flat the most economical flat truss for a roof is provided when the depth of the truss in inches is approximately equal to 7 of the span in inches.

72 5 0 mi ni m u m girder floor truss. Other floor and roof loading conditions a variety of species and other lumber grades are available. Top chord dead load 10 psf. Bottom chord dead load 5 psf.

However 6 plies are allowed if load is tying in from. The same thing is true for the bridge of the truss. All truss designs are optimized to provide the most economical configuration for the specific application. Some common trusses are named according to their web configuration such as the king post fan fink or howe truss.

Wood roof and floor trusses but mitek fabricators also. Maximum span to depth ratio is 24 for parallel chord roof trusses for example a 24 deep parallel chord roof truss should not exceed a span of 48. The parallel chord or flat truss gets its name from having parallel top and bottom chords. And parallel to floor truss span strongback lateral supports 24 max.

Most economical when the difference in slope between the top and bottom chords is at least 3 12 or the bottom chord pitch is no more than half the top chord pitch. 1 b t c. Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge. It is most often used for roof construction.