Parallel Chord Roof Truss Span Chart

Included are a series of representative roof truss span tables that will give you an idea of the truss spans available for a particular load condition load duration lumber type and truss configuration.

Parallel chord roof truss span chart.

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. 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. Openings are to be located in the center of the span max opening width is 24 inches 7. The truss is a framework consisting of rafters posts and struts which supports your roof.

Keep in mind that these tables are for estimations only. 1 b t c. Tcll top chord floor live load 2. Top chord dead load 10 psf.

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. Bottom chord dead load 5 psf. Center line chase 24 max. Tcdl 10 psf and bcdl 5 psf 3.

Top and bottom chords braced by structural sheathing 6. Trusses must be designed for any special loading such as concentrated loads. You can use sbca s span charts to roughly determine truss sizes available. Other floor and roof loading conditions a variety of species and other lumber grades are available.