Standard Roof Truss Span

The shapes and spans shown here represent only a fraction of the millions of designs produced by alpine engineers.

Standard roof truss span.

The distance between trusses. Girder trusses are designed to carry additional loads other than standard roof loads. The standard spacing is 2. These steel joints are needed to support the overall truss.

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. 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. 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. 8 10 foot 1 10 foot 1.

The same thing is true for the bridge of the truss. This makes the roof ready for decking or sheetrock. This is the distance between trusses. This means that if you re in charge of repairing or installing roofing trusses you ll be expected to hold to these standards.

When making a selection below to narrow your results down each selection made will reload the page to display the desired results. The more complex the truss framework is the greater quantity of these joints will be required. The standard roof truss spacing is 2. Click to add item 24 spreadweb residential roof truss 5 12 pitch 87 to the compare list.

The steeper the roof the more expensive the trusses get because the longer the boards get and the more roof area increases. You can use sbca s span charts to roughly determine truss sizes available. There is a little misconception about truss spacing and strength. Common or standard trusses are symmetrical and have standard four inch heels.

A truss with the same pitch and heel on both sides and a peak at the center is called a common truss. Standard framing details for use in preliminary design. A few customers prefer installing the trusses every 16 on center because they believe this will be. Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge.

Almost all residential trusses use this spacing. 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. Alpine truss designs are engineered to meet specific span configuration and load conditions.