Standard Roof Rafter Spacing

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

Standard roof rafter spacing.

If you get premium kiln dried lumber then you could span 10 5 with the same size of lumber and. Spacing of roof framing members depends on the type and thickness of the roof sheathings boads and the regional snow loads. 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. On center as the roof sheathing is span rated for 24 o c.

Builders aren t bound by standard rafter spacing measurements. 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. There is no standard spacing it depends on what size of rafters you want to use and the span of your shed. 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. A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel. Wider panels allow for greater spacing between rafters.

Rafters must be strong enough to hold the roof sheathing and the shingles.