Top Chord Bearing Roof Truss

Top chord bearing truss in conventional residential construction framing in phoenix arizona consumed considerably more wood than should have been used resulting in extra costs of both time and materials.

Top chord bearing roof truss.

A top chord bearing truss is used to support the second story floor assembly. When the 4x4 block length is extended this is referred to as mid chord bearing. Top chord bearing red s truss butting with red l and red w trusses. Roof truss bearing on icf wall.

Scissor truss slope differentials between top and bottom chords must be greater than or equal to 2 12 maximum span to depth ratio is 24 for parallel chord roof trusses for example a 24. Roof trusses do not break truss triangulation by removing webs. Fan trussa floor truss with 30 top chord panels and 60 bottom chord panels and a fan web configuration. 104kb pdf download pdf.

Energy efficiency roof trusses energy codes residential codes irc design performance products. Truss a pre built component that functions as a structural support member. The ends of these trusses are visible on the exterior. Maximum span truss with un triangulated heels 20 0.

77kb dwg download dwg. Extended top chord bearinga floor truss sup port condition in which the truss load is trans ferred to the support through the top chord member extending to sit on the support. Flat truss with cantilever pratt configuration top chord bearing flat truss pratt configuration fl att rus w e nc of ig s l op i ngp are ch ds h w f u t 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. Flat truss bottom chord bearing on icf wall.

Trusses can be designed to have support right under the top chord. Sometimes the bearing sits between the top and bottom chord of the truss and a mid height bearing the 2x6 vertical shown in the image below will be used. An analysis of a toe nail connection visible after sheathing is installed. 97kb pdf download pdf.

72kb dwg download dwg. If the bearing is below the truss bottom chord the end vertical of the truss can extend down to sit on the bearing. Top chord bearinga floor truss support condition in which the truss load is transferred to the bearing or support through the top chord and 4x4 block end detail. This truss can be used when greater area is needed for solar panels on one side of a roof or if the building owner wants to put windows in the vertical portion of the top chord to allow light into the building.

Red w truss top chord bearing.