Rafter Spacing Roof

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.

Rafter spacing roof.

2 4 rafters can span up to 7. For more information see our disclosures here. Patio roof maximum beam rafter spans. Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof.

The wider the roofing panels the greater spacing distance you should put. 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. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center. Rafters must be strong enough to hold the roof sheathing and the shingles.

There is no standard spacing it depends on what size of rafters you want to use and the span of your shed. The width of metal panels will determine the rafter spacing. 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. For light load roofs 24 o c.

Spacing your 2 4 shed rafters at 24 on center limits the width of your roof. For instance 2 grade 2x4s at 16 on center will span just over 9. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. 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. For heavy loads 2x4s can span up to 5. An essential part of planning a patio roof or gazebo project is determining the number size and spacing of rafters beams and posts according to the loads they will carry. For standard shed roof rafter spacing see rafter span chart.

Typical rafter spacing codes will specify a minimum spacing of 16 inches 19 2 inches or 24 inches. This post may contain affiliate links. If your local building authority has a rafter spacing code you may not space rafters wider than required by code. Rafter spacing is based on the width of the metal roofing panels.

Structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes. If you get premium kiln dried lumber then you could span 10 5 with the same size of lumber and. The metal roof purlins spacing must be done correctly within narrow tolerances.