Shed Roof Rafter Span Table

For an 8 10 shed one sheet of plywood should be fine.

Shed roof rafter span table.

The rule of thumb is that the gusset should be twice the width of the wood you use for your rafters. The spans in this table are based on a maximum supported rafter span of 16 feet where the supported span is the total horizontal distance spanned by the roof rafters divided in half not the diagonal distance or the length of the rafter. Rafter spans for southern yellow pine douglas fir and eastern spruce. Straight line interpolation shall be permitted for intermediate spans and design values.

You are going to cut out triangles that will cover the apex of each set of rafters. If you have a single sloped roof then the 11 span distance for 2 4 rafters o c. Also available for the android os. Span calculator for wood joists and rafters also available for the android os.

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. Our premium pole barn kits come standard with pre engineered trusses but building rafters is another viable diy option for smaller span structures. So roughly 7 8 long for a 2 4. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.

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. Means that your shed should be no wider or longer depending on how you orientate your single sloped roof than 11. Use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size. Therefore for gable roofed sheds the rafter span table is indicating how far a rafter can span half of your shed s width.

Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall. The calculated spans assume fully supported members properly sheathed and nailed on the top edge of the joist or rafter.