Spacing Roof Rafters

Patio roof maximum beam rafter spans.

Spacing roof rafters.

This post may contain affiliate links. If you get premium kiln dried lumber then you could span 10 5 with the same size of lumber and. There is a chance of damaging roofing sheets if you are failed to do so. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.

If your local building authority has a rafter spacing code you may not space rafters wider than required by code. 2 4 rafters can span up to 7. The metal roof purlins spacing must be done correctly within narrow tolerances. The spacing between rafters in a given building is part of the engineering calculations that determine the required structure of the roof.

The width of metal panels will determine the rafter spacing. 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. Wider panels allow for greater spacing between rafters.

For light load roofs 24 o c. It is always better to have a large rafter rather than be concerned with a sagging roof. There is no standard spacing it depends on what size of rafters you want to use and the span of your shed. Rafter spacing is based on the width of the metal roofing panels.

Span calculator for wood joists and rafters also available for the. For heavy loads 2x4s can span up to 5. Typical rafter spacing codes will specify a minimum spacing of 16 inches 19 2 inches or 24 inches. Spacing in exterior exposure.

The wider the roofing panels the greater spacing distance you should put. Live load psf dead load psf span calculator for wood joists and rafters available for the iphone. For more information see our disclosures here. Rafters must be strong enough to hold the roof sheathing and the shingles.

Structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes. 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. For instance 2 grade 2x4s at 16 on center will span just over 9. 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.