Typical Roof Rafter Spacing

There is no standard spacing it depends on what size of rafters you want to use and the span of your shed.

Typical roof rafter spacing.

Other relevant factors include the type of wood being used for the rafters the size of the rafters and the load that the rafters need to support. For instance 2 grade 2x4s at 16 on center will span just over 9. If you get premium kiln dried lumber then you could span 10 5 with the same size of lumber and. If your local building authority has a rafter spacing code you may not space rafters wider than required by code.

If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center. It is always better to have a large rafter rather than be concerned with a sagging roof. Typical rafter spacing codes will specify a minimum spacing of 16 inches 19 2 inches or 24 inches. Plasterboard on the underside of the rafter.

The standard construction of interior framing in a home uses 16 inch on center oc spacing for ceiling joists. Joist spacing in this design mode incorporates different types of wood used in ceiling construction including 2 grades of southern pine douglas fir and hemlock fir types which are the most common. For standard shed roof rafter spacing see rafter span chart. Note that the type of roof covering in this table maximum clear spans for laminated sa pine supporting a tile or slate roof with a 26 degree pitch is shown in the first column and the rafter spacing in the other four columns.

Structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes. Spacing of roof framing members depends on the type and thickness of the roof sheathings boads and the regional snow loads. The spacing between rafters in a given building is part of the engineering calculations that determine the required structure of the roof. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that.

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. Typical tiled roof with plasterboard on underside of rafters. Usually 400 450 or 600mm but any value can be used up to 610mm max. Here in northern wisconsin must roof framing is 24 o c.

Are there any brittle finishes e g. 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. This is the distance between rafter centres.