Standard Roof Truss Span

Girder trusses are designed to carry additional loads other than standard roof loads.

Standard roof truss span.

The standard spacing is 2. Click to add item 24 spreadweb residential roof truss 5 12 pitch 87 to the compare list. 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. You will also incur additional costs because it is much harder to deck and shingle a roof that is 12 12 pitch versus a 4 12 roof.

8 10 foot 1 10 foot 1. A truss with the same pitch and heel on both sides and a peak at the center is called a common truss. These steel joints are needed to support the overall truss. While this article focuses on configurations we also have a very cool set of illustrations showcasing the different parts anatomy of roof trusses.

The same thing is true for the bridge of the truss. Alpine truss designs are engineered to meet specific span configuration and load conditions. Almost all residential trusses use this spacing. There is a little misconception about truss spacing and strength.

Although the standard spacing of roof trusses may be the same as that of rafters with 24 inch spacing being a common option the design of a truss may allow for the use of a lower grade of lumber than would be required for rafters with comparable spacing and span. Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge. The standard roof truss spacing is 2. This is the distance between trusses.

A few customers prefer installing the trusses every 16 on center because they believe this will be. 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. 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. The roof truss spacing standard is important because eighty percent of new homes are built with standard pre fabricated trusses.

The steeper the roof the more expensive the trusses get because the longer the boards get and the more roof area increases. This makes the roof ready for decking or sheetrock. The shapes and spans shown here represent only a fraction of the millions of designs produced by alpine engineers. You can use sbca s span charts to roughly determine truss sizes available.

Standard framing details for use in preliminary design. The distance between trusses. Common or standard trusses are symmetrical and have standard four inch heels.