Rafter Span Roof Truss Span Calculator

Rafter is a sloping beam usually wood that supports a pitched roof.

Rafter span roof truss span calculator.

The rafter member will be longer. The lengths and sizes of joists vary depending on the species and quality of the lumber used. 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. This rafter span calculator is species specific for douglas fir hemlock etc.

This calculator helps you make the rafters of the suitable sizes required for your roofing. Also available for the android os. Use of manufactured roof trusses can dramatically cut labor costs when framing a gable roof compared to building rafters. Click the button to calculate the stock size needed for this job.

For example you can span a 1 grade no knots southern yellow pine a greater distance than a 2 grade with knots southern yellow pine. Use our online rafter length calculator to quickly compute the length of the shed roof rafter by entering the measurements of overhead length of roof span pitch or angle. More roof calculators roof truss calculator how to cut rafters. Note that this is not the actual length of the rafter.

Span calculator for wood joists and rafters also available for the android os. To size joists and rafters use the maximum span tables for southern yellow pine. The truss is a framework consisting of rafters posts and struts which supports your roof. Rafter and joist span faq.

This is based upon the span of the rafter horizontal span not total rafter length live and dead loads. This calculator is to be used as an estimating tool only. Area span on the flat please enter area span on the flat in foot. Click the button to calculate the stock size needed for this job.

This calculator is to be used as an estimating tool only. If you plan to have overhang etc. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. Rafter stock size calculator.

Trusses can be constructed with smaller sized lumber than rafters and often their cost is not significantly higher than normal rafters. Input the rafter span on the flat eave overhang and pitch of the roof. For example if the roof rises 4 feet and the span is 16 feet twice the run. It is the length of this portion of the rafter.

If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length.