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.

Spacing roof rafters.

2 4 rafters can span up to 7. Spacing your 2 4 shed rafters at 24 on center limits the width of your roof. For instance 2 grade 2x4s at 16 on center will span just over 9. Live load psf dead load psf span calculator for wood joists and rafters available for the iphone.

A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel. The metal roof purlins spacing must be done correctly within narrow tolerances. Rafter spacing is based on the width of the metal roofing panels. If you get premium kiln dried lumber then you could span 10 5 with the same size of lumber and.

Patio roof maximum beam rafter spans. For standard shed roof rafter spacing see rafter span chart. For light load roofs 24 o c. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.

There is a chance of damaging roofing sheets if you are failed to do so. The width of metal panels will determine the rafter spacing. For more information see our disclosures here. This post may contain affiliate links.

An essential part of planning a patio roof or gazebo project is determining the number size and spacing of rafters beams and posts according to the loads they will carry. Spacing in exterior exposure. If your local building authority has a rafter spacing code you may not space rafters wider than required by code. Rafters must be strong enough to hold the roof sheathing and the shingles.

Span calculator for wood joists and rafters also available for the. 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. 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. For heavy loads 2x4s can span up to 5.

Structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes. Wider panels allow for greater spacing between rafters. It is always better to have a large rafter rather than be concerned with a sagging roof. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center.