Shed Roof Rafter Span Table

Therefore for gable roofed sheds the rafter span table is indicating how far a rafter can span half of your shed s width.

Shed roof rafter span table.

For an 8 10 shed one sheet of plywood should be fine. The calculated spans assume fully supported members properly sheathed and nailed on the top edge of the joist or rafter. Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall. Straight line interpolation shall be permitted for intermediate spans and design values.

So this table could accommodate a house with a total rafter span or house width of 32 feet. Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. If you have a single sloped roof then the 11 span distance for 2 4 rafters o c. Span calculator for wood joists and rafters also available for the android os.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. The rule of thumb is that the gusset should be twice the width of the wood you use for your rafters. Use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size. Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run.

These span tables assume installation of at least three joists or rafters that are spaced not more than 24 on center. Also available for the android os. Rafter spans for southern yellow pine douglas fir and eastern spruce. 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.

So roughly 7 8 long for a 2 4. Means that your shed should be no wider or longer depending on how you orientate your single sloped roof than 11.