Rafter Spacing Roof

If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center.

Rafter spacing roof.

Can span up to 13 4. 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 spacing is based on the width of the metal roofing panels. Wider panels allow for greater spacing between rafters.

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. Determining rafter s spacing is as important as setting the metal roof purlins spacing. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. Posted in metal roof roof types.

An spf roof at the same spacing and lumber size will span 11. 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. Builders aren t bound by standard rafter spacing measurements. If your local building authority has a rafter spacing code you may not space rafters wider than required by code.

Use these two tables for roof rafters with a slope greater than 3 in 12. These numbers are for roofs supporting light loads of 20 pounds for square foot. For standard shed roof rafter spacing see rafter span chart. The most common measurement used for rafter spacing is either 16 or 24 inches.

An syp 2 6 rafter at 24 o c. Typical rafter spacing codes will specify a minimum spacing of 16 inches 19 2 inches or 24 inches. There is no standard spacing it depends on what size of rafters you want to use and the span of your shed. Rafter span tables use these two tables for roof rafters with a slope of 3 in 12 or less.

You have to take the width of your roofing panel into the considerations. Rafter spacing rafters must be strong enough to hold the roof sheathing and the shingles. For instance 2 grade 2x4s at 16 on center will span just over 9. Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.

The above spans are based on american softwood lumber standard sizes.