How Far Apart Should Roof Rafters Be On A Shed

For instance 2 grade 2x4s at 16 on center will span just over 9.

How far apart should roof rafters be on a shed. Once you ve calculated the number of trusses you will need you should purchase the lumber. The trusses should be a little longer than the exact width to allow for overhang and you will need sufficient trusses to mount across the length. For standard shed roof rafter spacing see rafter span chart. 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. At this point you ve cut 1 roof rafter. All roof rafters should be identical so follow the same steps to measure the plumb cut tail cut and birdsmouth cut. A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel.

Putting the trusses into place. As a general rule roofs that have a high human occupancy rate should be framed with rafters every 16 structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes. Repeat the process for your other rafters. An syp rafter can span 11.

Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. Wider panels allow for greater spacing between rafters. 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. Depending on the size of your structure you will need to cut several or many more.

As mentioned above a 2 4 spf shed roof rafter can span 11. Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof. An syp rafter can span 8. To determine how far apart to set rafters measure the width of the metal panel and then the width of the first hill and valley of the panel.

Both of these are for light roof loads. Most are spaced between 18 26 inches apart. Other relevant factors include the type of wood being used for the rafters the size of the rafters and the load that the rafters need to support. 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.

If you live in an area that requires a shed roof rafter to support a heavy load then an spf rafter can only span 7.