Standard Roof Truss Span

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

Standard roof truss span.

There is a little misconception about truss spacing and strength. The same thing is true for the bridge of the truss. 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 distance between trusses.

This makes the roof ready for decking or sheetrock. Click to add item 24 spreadweb residential roof truss 5 12 pitch 87 to the compare list. You can use sbca s span charts to roughly determine truss sizes available. The roof truss spacing standard is important because eighty percent of new homes are built with standard pre fabricated trusses.

A truss with the same pitch and heel on both sides and a peak at the center is called a common truss. Common or standard trusses are symmetrical and have standard four inch heels. 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 is the distance between trusses.

When making a selection below to narrow your results down each selection made will reload the page to display the desired results. 8 10 foot 1 10 foot 1. Almost all residential trusses use this spacing. A few customers prefer installing the trusses every 16 on center because they believe this will be.

Standard framing details for use in preliminary design. 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. The shapes and spans shown here represent only a fraction of the millions of designs produced by alpine engineers. The more complex the truss framework is the greater quantity of these joints will be required.

The steeper the roof the more expensive the trusses get because the longer the boards get and the more roof area increases. 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. Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge. This means that if you re in charge of repairing or installing roofing trusses you ll be expected to hold to these standards.

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. Girder trusses are designed to carry additional loads other than standard roof loads. The standard roof truss spacing is 2.