Rafter Spacing For Corrugated Roofing

The support system for the roof is comprised of ridgepole and rafters or purlins.

Rafter spacing for corrugated roofing.

24 1 2 every 6 ft. Calculations determine the maximum spacing based on the material used rafter size and load the roof needs to hold so that the roof is safe and meets all building codes. Although there is not one standard rafter spacing measurement many builders follow standard increments for simplicity. Rafter spacing depends on the roofing panel size.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. 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 typical spacing standards for residential and commercial buildings are about 1 to 2 foot. Stockbyte stockbyte getty images when placing rafters for a tin roof also frequently referred to as corrugated metal or steel it is common to set the distance between rafters based on the size of the roofing panels.

For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet.