Diagram Roof Truss Span Calculator

This rafter truss calculator has a range of applications including being used as a wood truss calculator roof truss calculator roof rafter calculator scissor truss calculator or for roof framing.

Diagram roof truss span calculator. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. While this article focuses on configurations we also have a very cool set of illustrations showcasing the different parts anatomy of roof trusses. This free online truss and roof calculator generates the axial forces and reactions of completely customisable 2d truss structures. Print full scale paper templates cut and fold over wood to mark and cut angles.

Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. Hip roof framing calculator plan diagram with full dimensions. To size joists and rafters use the maximum span tables for southern yellow pine. These steel joints are needed to support the overall truss.

Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Is a family owned and operated designer and manufacturer of wooden roof trusses in north central idaho. More roof calculators roof truss calculator how to cut rafters. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.

Rafter join detail hip roof framing hip to common to ridge join diagram. 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. This rafter span calculator is species specific for douglas fir hemlock etc. Also available for the android os.

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. Adjust to suit for a good straight fascia add an extra 20 mm or so to the tails of all your rafters total length. The more complex the truss framework is the greater quantity of these joints will be required. Alpine truss designs are engineered to meet specific span configuration and load conditions.

The same thing is true for the bridge of the truss. 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. The shapes and spans shown here represent only a fraction of the millions of designs produced by alpine engineers.