Roof Truss Span Chart

To size joists and rafters use the maximum span tables for southern yellow pine.

Roof truss span chart.

Typical roof truss design spans general notes. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. Every trussteel roof truss is a custom design based upon the unique load span bearing use and code criteria of a particular project. Span calculator for wood joists and rafters also available for the android os.

This is based upon the span of the rafter horizontal span not total rafter length live and dead loads. This rafter span calculator is species specific for douglas fir hemlock etc. 4 oc 25 5 0 5 psf truss member sizing no ceiling dimensional lumber required. Tcll 40 psf tcll 80 psf tcll 125 psf truss spacing truss spacing truss spacing.

You can use sbca s span charts to roughly determine truss sizes available. Also available for the android os. The load span tables shown below demonstrate only a tiny subset of the possible combinations available with trussteel cfs roof trusses. 1 spans shown in charts.

Floor truss span chart each individual floor truss design is unique based on multiple variables. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. 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. The truss calculator will determine your roof trusses based on key inputs related to the pitch span and overhang of your roof.

The shapes and spans shown here represent only a fraction of the millions of designs produced by alpine engineers. Span tables below illustrate common combinations of the multiple variables available. Geometry loading spacing bearing conditions etc. Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch.

Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run. More roof calculators roof truss calculator how to cut rafters. Total load psf duration factor live load psf roof type 55 1 15 40 snow shingle 55 1 15 30 snow tile 47 30 snow 40 20 snow 1 25 20.