Parallel Chord Roof Truss Span Chart

Openings are to be located in the center of the span max opening width is 24 inches 7.

Parallel chord roof truss span chart.

Other floor and roof loading conditions a variety of species and other lumber grades are available. Live load l 480 total load l 360 5. Trusses must be designed for any special loading such as concentrated loads. The truss is a framework consisting of rafters posts and struts which supports your roof.

Top and bottom chords braced by structural sheathing 6. You can use sbca s span charts to roughly determine truss sizes available. The important point to keep in mind when you use your truss calculator is that every truss calculation is completely unique and is based on the size of your roof and its specific dimensions. Tcdl 10 psf and bcdl 5 psf 3.

Top chord dead load 10 psf. Center line chase 24 max. Spacing of trusses are center to center in inches. Strongback splicing at change of span type 2 bracing unit 70 x 35 block fixed to msj with 2 75mm 3 05ø nails to top chord and bottom chord multigrip strongback strongback fix bracing panel to vertical webs with 2 30mm x 2 8ø nails fix trimmer to wall top plate with 3 75mm x 3 05ø nails 7 0 mm structural plywood or equivalent masonite fixed.

1 b t c. Roof truss span tables alpine engineered products 15 top chord 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 bottom chord 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2 12 24 24 33 27 27 37 31 31 43 33 33 46 2 5 12 29 29 39 33 33 45 37 38 52 39 40 55 3 12 34 34 46 37 39 53 40 44 60 43 46 64 3 5 12 39 39 53 41 44 61 44 50 65 47 52 70. Spans shown are in feet 4. Bottom chord dead load 5 psf.