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.

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

The steeper the roof the more expensive the trusses get because the longer the boards get and the more roof area increases. They are designed at a 4 12 pitch to be spaced 2 foot on center. 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. Shop our wide selection of stock and custom roof trusses to complete your building project available in a variety of styles and sizes.

This is the distance between trusses. These trusses the meet building code criteria as specified by structural building components of america sbca and the truss plate institute tpi.