Shed Roof Rafter Span Table

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.

Shed roof rafter span table.

Rafter spans for southern yellow pine douglas fir and eastern spruce. Use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size. If you have a single sloped roof then the 11 span distance for 2 4 rafters o c. Therefore for gable roofed sheds the rafter span table is indicating how far a rafter can span half of your shed s width.

Also available for the android os. So this table could accommodate a house with a total rafter span or house width of 32 feet. Straight line interpolation shall be permitted for intermediate spans and design values. 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.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. Span calculator for wood joists and rafters also available for the android os. So roughly 7 8 long for a 2 4. 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.

You are going to cut out triangles that will cover the apex of each set of rafters. Means that your shed should be no wider or longer depending on how you orientate your single sloped roof than 11. Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall. The rule of thumb is that the gusset should be twice the width of the wood you use for your rafters.

The calculated spans assume fully supported members properly sheathed and nailed on the top edge of the joist or rafter. Our premium pole barn kits come standard with pre engineered trusses but building rafters is another viable diy option for smaller span structures.