Standard Roof Rafter Spacing

A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel.

Standard roof rafter spacing.

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. For standard shed roof rafter spacing see rafter span chart. There is no standard spacing it depends on what size of rafters you want to use and the span of your shed. If your local building authority has a rafter spacing code you may not space rafters wider than required by code.

Builders aren t bound by standard rafter spacing measurements. Rafters must be strong enough to hold the roof sheathing and the shingles. Here in northern wisconsin must roof framing is 24 o c. Rafter spacing is based on the width of the metal roofing panels.

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. Wider panels allow for greater spacing between rafters. Typical rafter spacing codes will specify a minimum spacing of 16 inches 19 2 inches or 24 inches. If you get premium kiln dried lumber then you could span 10 5 with the same size of lumber and.

For instance 2 grade 2x4s at 16 on center will span just over 9.