How Far Apart Are Roof 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.

How far apart are roof rafters.

For example in the rafter span table below the highlighted cell in the 40 live load table indicates that 2 x 8 southern yellow pine joists that have a grade of 2 that are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2. For more information see our disclosures here. Patio roof maximum beam rafter spans. They vary in size depending on length and spacing.

2 4 rafters can span up to 7. Most roof framing is 24 on center and you can still build sheds up to 14 with 2 4 rafters at 24 on center. But they do tend to space rafters in one of several industry standard increments typically either 12 16 or 24 inches apart. 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 heavy loads 2x4s can span up to 5. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center. How far apart do i set rafters for a tin roof. They are inclined members spaced from 16 to 48 inches apart.

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. All roof rafters should be identical so follow the same steps to measure the plumb cut tail cut and birdsmouth cut. For light load roofs 24 o c. Rafters make up the main framework of all roofs.

This link will take. This post may contain affiliate links. In this video i will look at how to calculate the number of rafter required for a roof. As a general rule roofs that have a high human occupancy rate should be framed with rafters every 16 structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes.

These spacing intervals are measured on center meaning that the measurement is taken from the center of one rafter s horizontal surface to the center of the next rafter. Rafters are commonly spaced about 24 inches 61 cm apart. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. The tops of inclined rafters are fastened to the ridge or another rafter depending on the type of roof.

The number of rafters needed will be determined by the length of your roof. What is the standard spacing of a roof rafter. Spacing your 2 4 shed rafters at 24 on center limits the width of your roof.