How Far Apart Are Roof Rafters

Calculate the length of your rafters.

How far apart are roof rafters.

This post may contain affiliate links. Therefore if you want a 10 12 single sloped roof and you live in a heavy snow area then you can space your rafters 16 apart and use spf 2 6 lumber. Patio roof maximum beam rafter spans. Homepage metal roof metal roof purlins spacing and rafter distance details by rooflast posted on june 29 2020 june 29 2020 during the roof installation or re roofing process after the roof sheets are prepared it is time to support their framework by installing purlins.

Also available for the android os. All roof rafters should be identical so follow the same steps to measure the plumb cut tail cut and birdsmouth cut. To determine how far apart to set rafters measure the width of the metal panel and then the width of the first hill and valley of the panel. Wider panels allow for greater spacing between rafters.

For more information see our disclosures here. We ll be building a 4 12 pitch roof with an 8 span with 1 of overhang. 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. With this set of specs we are looking at a rafter length of 5 3.

A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. 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. This total span is well within the load capacity of 2 4 rafters but how far apart can we space the rafters.

Repeat the process for your other rafters. Span calculator for wood joists and rafters also available for the android os. You should use 2 4 rafters if you live in an area without heavy snow or wind loads. 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.

Should i use 2 4 or 2 6 rafters for shed roof. The spacing between rafters in a given building is part of the engineering calculations that determine the required structure of the roof. 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.