Shed Roof Rafter Span Table

Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall.

Shed roof rafter span table.

So this table could accommodate a house with a total rafter span or house width of 32 feet. Use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size. The calculated spans assume fully supported members properly sheathed and nailed on the top edge of the joist or rafter. Span calculator for wood joists and rafters also available for the android os.

Straight line interpolation shall be permitted for intermediate spans and design values. Rafter span tables use these tables to determine lengths sizes and spacing of rafters. These span tables assume installation of at least three joists or rafters that are spaced not more than 24 on center. Means that your shed should be no wider or longer depending on how you orientate your single sloped roof than 11.

This is based upon the span of the rafter horizontal span not total rafter length live and dead loads. You are going to cut out triangles that will cover the apex of each set of rafters. Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. If you have a single sloped roof then the 11 span distance for 2 4 rafters o c.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. Also available for the android os. This rafter span calculator is species specific for douglas fir hemlock etc. To size joists and rafters use the maximum span tables for southern yellow pine.

For an 8 10 shed one sheet of plywood should be fine. Therefore for gable roofed sheds the rafter span table is indicating how far a rafter can span half of your shed s width. The rule of thumb is that the gusset should be twice the width of the wood you use for your rafters.