Rafter Spacing Roof

The spacing between rafters in a given building is part of the engineering calculations that determine the required structure of the roof.

Rafter spacing roof.

There is no standard spacing it depends on what size of rafters you want to use and the span of your shed. For light load roofs 24 o c. Rafters must be strong enough to hold the roof sheathing and the shingles. This post may contain affiliate links.

There is a chance of damaging roofing sheets if you are failed to do so. 2 4 rafters can span up to 7. 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. It is always better to have a large rafter rather than be concerned with a sagging roof.

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. Spacing your 2 4 shed rafters at 24 on center limits the width of your roof. For more information see our disclosures here. For heavy loads 2x4s can span up to 5.

A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center. 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. For standard shed roof rafter spacing see rafter span chart.

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. Rafter spacing is based on the width of the metal roofing panels. Wider panels allow for greater spacing between rafters. Patio roof maximum beam rafter spans.

The wider the roofing panels the greater spacing distance you should put. If your local building authority has a rafter spacing code you may not space rafters wider than required by code. For instance 2 grade 2x4s at 16 on center will span just over 9. Typical rafter spacing codes will specify a minimum spacing of 16 inches 19 2 inches or 24 inches.

The width of metal panels will determine the rafter spacing. The metal roof purlins spacing must be done correctly within narrow tolerances. Structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes.