Standard Roof Truss Sizes

The important point to keep in mind when you use your truss calculator is that every truss calculation is completely unique and is based on the size of your roof and its specific dimensions.

Standard roof truss sizes.

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. This is the distance between trusses. A truss with the same pitch and heel on both sides and a peak at the center is called a common truss.

The standard roof truss spacing is 2. The truss is a framework consisting of rafters posts and struts which supports your roof. 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. Pre manufactured stock trusses are constructed with spruce pine fir spf or southern yellow pine syp lumber.

They are designed at a 4 12 pitch to be spaced 2 foot on center. These trusses the meet building code criteria as specified by structural building components of america sbca and the truss plate institute tpi.