Standard Roof Truss Sizes

Common or standard trusses are symmetrical and have standard four inch heels.

Standard roof truss sizes.

The truss is a framework consisting of rafters posts and struts which supports your roof. Shop our wide selection of stock and custom roof trusses to complete your building project available in a variety of styles and sizes. Girder trusses are designed to carry additional loads other than standard roof loads. Pre manufactured stock trusses are constructed with spruce pine fir spf or southern yellow pine syp lumber.

The steeper the roof the more expensive the trusses get because the longer the boards get and the more roof area increases. This is the distance between trusses. 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.

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. 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.