Rafter Spacing For Metal Roof

For heavy loads 2x4s can span up to 5.

Rafter spacing for metal roof.

For light load roofs 24 o c. Rafter spacing for metal roof. Rafter spacing is based on the width of the metal roofing panels. It is always better to have a large rafter rather than be concerned with a sagging roof.

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. 2 4 rafters can span up to 7. Structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes.

You have to take the width of your roofing panel into the considerations. So the space between rafters can be greater without reducing the maximum span. Wider panels allow for greater spacing between rafters. Most roof framing is 24 on center and you can still build sheds up to 14 with 2 4 rafters at 24 on center.

Keep it at 24. The same concept holds true for roof trusses. Never seen anyone use 2 x 4 s always 1 x 4 s. Determining rafter s spacing is as important as setting the metal roof purlins spacing.

Do not use pressure treat wood for the purlins it will eat up the metal roofing and screws. Spacing your 2 4 shed rafters at 24 on center limits the width of your roof.