Roof Rafter Spacing

Since most sheets are 4 x8 typical rafter spacing are 12 16 24.

Roof rafter spacing. In california 16 is by far the most common for residential construction. Use these two tables for roof rafters with a slope greater than 3 in 12. The same concept holds true for roof trusses.

In the us they are typically spaced at fractions of the roof sheathing size. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. 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 instance 2 grade 2x4s at 16 on center will span just over 9. There is no standard spacing it depends on what size of rafters you want to use and the span of your shed. It is always better to have a large rafter rather than be concerned with a sagging roof.

Structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes. Rafter spacing rafters must be strong enough to hold the roof sheathing and the shingles. The above spans are based on american softwood lumber standard sizes.

Rafter span tables use these two tables for roof rafters with a slope of 3 in 12 or less. 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. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center.

For standard shed roof rafter spacing see rafter span chart. The most common measurement used for rafter spacing is either 16 or 24 inches. You have to take the width of your roofing panel into the considerations.