Standard Roof Rafter Spacing

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Standard roof rafter spacing.

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. Here in northern wisconsin must roof framing is 24 o c. 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.

Spacing of roof framing members depends on the type and thickness of the roof sheathings boads and the regional snow loads. 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. A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel. Rafter and roof joist spacing is only one part of a complex roof design that works together to form a structure that meets building codes and can hold up the weight of the roof and roof load.

Rafter spacing is based on the width of the metal roofing panels. 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. On center as the roof sheathing is span rated for 24 o c.

Typical rafter spacing codes will specify a minimum spacing of 16 inches 19 2 inches or 24 inches.