Rafter Spacing For Metal Roof

2 4 rafters can span up to 7.

Rafter spacing for metal roof.

Keep it at 24. Do not use pressure treat wood for the purlins it will eat up the metal roofing and screws. Determining rafter s spacing is as important as setting the metal roof purlins spacing. The same concept holds true for roof trusses.

Never seen anyone use 2 x 4 s always 1 x 4 s. It is always better to have a large rafter rather than be concerned with a sagging roof. Common spacing for trusses on this type of building is often between 2 and 4 feet but trusses built with advanced designs may allow spacing as great as 8 or 12 feet. For light load roofs 24 o c.

Most roof framing is 24 on center and you can still build sheds up to 14 with 2 4 rafters at 24 on center. You have to take the width of your roofing panel into the considerations. Wider panels allow for greater spacing between rafters. Structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes.

The most common measurement used for rafter spacing is either 16 or 24 inches. Rafter spacing is based on the width of the metal roofing panels. Spacing your 2 4 shed rafters at 24 on center limits the width of your roof. So the space between rafters can be greater without reducing the maximum span.

Rafter spacing for metal 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.