Spacing Roof Rafters

Spacing in exterior exposure.

Spacing roof rafters.

There is no standard spacing it depends on what size of rafters you want to use and the span of your shed. Rafter spacing is based on the width of the metal roofing panels. The wider the roofing panels the greater spacing distance you should put. For instance 2 grade 2x4s at 16 on center will span just over 9.

Spacing your 2 4 shed rafters at 24 on center limits the width of your roof. Wider panels allow for greater spacing between rafters. Rafters must be strong enough to hold the roof sheathing and the shingles. It is always better to have a large rafter rather than be concerned with a sagging roof.

For light load roofs 24 o c. The spacing between rafters in a given building is part of the engineering calculations that determine the required structure of the roof. The metal roof purlins spacing must be done correctly within narrow tolerances. Live load psf dead load psf span calculator for wood joists and rafters available for the iphone.

For standard shed roof rafter spacing see rafter span chart. The width of metal panels will determine the rafter spacing. Span calculator for wood joists and rafters also available for the. Structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes.

Typical rafter spacing codes will specify a minimum spacing of 16 inches 19 2 inches or 24 inches. 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. If your local building authority has a rafter spacing code you may not space rafters wider than required by code.

For heavy loads 2x4s can span up to 5. This post may contain affiliate links. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. 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.

There is a chance of damaging roofing sheets if you are failed to do so. 2 4 rafters can span up to 7. 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. For more information see our disclosures here.