How Far Apart Rafters For Metal Roof

For roofs that will experience heavy snow or wind and will span the same distance use 2 6 rafters.

How far apart rafters for metal roof.

At this point you ve cut 1 roof rafter. In this example the section of roof is 20 feet wide and 14 feet from the fascia to the peak. The spacing between rafters in a given building is part of the engineering calculations that determine the required structure of the roof. Depending on the size of your structure you will need to cut several or many more.

A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel. 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. The typical spacing standards for residential and commercial buildings are about 1 to 2 foot. 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.

For roofs that won t experience heavy snow loads a gable roof can span up to 22 with 2 4 rafters. All roof rafters should be identical so follow the same steps to measure the plumb cut tail cut and birdsmouth cut. For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet. This translates to seven rows of strips 20 feet long spaced two feet apart or 140 lineal feet of.

Repeat the process for your other rafters.