Standard Roof Truss Sizes

The steeper the roof the more expensive the trusses get because the longer the boards get and the more roof area increases.

Standard roof truss sizes.

The truss is a framework consisting of rafters posts and struts which supports your roof. The standard roof truss spacing is 2. Roof truss span tables alpine engineered products 15 top chord 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 bottom chord 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2 12 24 24 33 27 27 37 31 31 43 33 33 46 2 5 12 29 29 39 33 33 45 37 38 52 39 40 55 3 12 34 34 46 37 39 53 40 44 60 43 46 64 3 5 12 39 39 53 41 44 61 44 50 65 47 52 70. These trusses the meet building code criteria as specified by structural building components of america sbca and the truss plate institute tpi.

Girder trusses are designed to carry additional loads other than standard roof loads. Common or standard trusses are symmetrical and have standard four inch heels. Shop our wide selection of stock and custom roof trusses to complete your building project available in a variety of styles and sizes. They are designed at a 4 12 pitch to be spaced 2 foot on center.

Pre manufactured stock trusses are constructed with spruce pine fir spf or southern yellow pine syp lumber. A truss with the same pitch and heel on both sides and a peak at the center is called a common truss.