Standard Roof Truss Span

Alpine truss designs are engineered to meet specific span configuration and load conditions.

Standard roof truss span.

While this article focuses on configurations we also have a very cool set of illustrations showcasing the different parts anatomy of roof trusses. This means that if you re in charge of repairing or installing roofing trusses you ll be expected to hold to these standards. The standard spacing is 2. This is the distance between trusses.

You can use sbca s span charts to roughly determine truss sizes available. The distance between trusses. 8 10 foot 1 10 foot 1. The shapes and spans shown here represent only a fraction of the millions of designs produced by alpine engineers.

The roof truss spacing standard is important because eighty percent of new homes are built with standard pre fabricated trusses. Almost all residential trusses use this spacing. These steel joints are needed to support the overall truss. The standard roof truss spacing is 2.

The more complex the truss framework is the greater quantity of these joints will be required. 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. Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge. Common or standard trusses are symmetrical and have standard four inch heels.

The same thing is true for the bridge of the truss. This makes the roof ready for decking or sheetrock. There is a little misconception about truss spacing and strength. Girder trusses are designed to carry additional loads other than standard roof loads.

When making a selection below to narrow your results down each selection made will reload the page to display the desired results. 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 steeper the roof the more expensive the trusses get because the longer the boards get and the more roof area increases. 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.

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. Standard framing details for use in preliminary design. Click to add item 24 spreadweb residential roof truss 5 12 pitch 87 to the compare list.