Residential Roof Truss Span Calculator

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.

Residential roof truss span calculator. Is a family owned and operated designer and manufacturer of wooden roof trusses in north central idaho. This online truss calculator will determine the all in cost of your truss based on key inputs related to the pitch width and overhang of your roof. Shop roof trusses spacer floor truss. Use this handy tool to calculate the rake length of your roof.

Also available for the android os. The shapes and spans shown here represent only a fraction of the millions of designs produced by alpine engineers. Alpine truss designs are engineered to meet specific span configuration and load conditions. Just as there are many types of roofs with many roof parts there are many different types of roof trusses this extensive article explains through a series of custom truss diagrams the different truss configurations you can use for various roofs.

8 10 foot 1 10 foot 1. 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. Our roof truss calculator can be used to aid you in the purchase of your trusses by determining the quantity of trusses and lineal feet required. Custom trusses up to 100 span.

Click to add item 26 spreadweb residential roof truss 6 12 pitch 87 to the compare list. Span calculator for wood joists and rafters also available for the android os. Over 51 sizes styles in stock. 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.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. When making a selection below to narrow your results down each selection made will reload the page to display the desired results. It will use the current cost of wooden rafters based on the average price found at home improvement stores.