Purlin Spacing For Corrugated Roofing

Non accessible roof and intermediate 1 600 2 400 1 500 2 100 wall cladding type 3 end 1 100 1 600 1 000 1 400 maximum recommended purlin intermediate 0 900 1 500 0 800 1 200 spacing for standard roof end 0 600 1 000 0 550 0 800 see notes below.

Purlin spacing for corrugated roofing.

For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. In heavy snow areas 500 series or greater panels are recommended and closer spacing of purlins should be considered. The following date is based upon uniform loading of corrugated panels fastened as recommended and with a safety factor of 2 5.

However sometimes corrugated sheets are 39 wide instead of 37 wide. Purlins are non pressure treated 1 x 4 x 12 lumber that is installed on to the roof in a specific layout pattern and screw pattern. The typical spacing standards for residential and commercial buildings are about 1 to 2 foot. The diagram above is a typical 37 wide panel and the spacing works out perfectly.

Correctly measure the spacing of furring strips for a metal roof to further decrease condensation. Twenty four inches is a common spacing of furring strips for a metal roof. 1 in 4 or less over 15 degrees purlins at 600mm spacing. Purlins at 450mm spacing.

When framing the roof the spacing for roof trusses should not exceed 24 inches 61 cm and purlins should not exceed 36 inches 91 cm apart. We do recommend it however. You can use both types of corrugated roofing together creating panels that will allow light to come through as with a clear or white fiberglass corrugated panel known as a skylight. The support system for the roof is comprised of ridgepole and rafters or purlins.

Panel basics corrugated metal panels often called tin because in the past such panels were sometimes made of tin are typically steel or aluminum sheets that are used as a roofing material. The screws are spaced out so that every third corrugation has a screw. Suntuf is supported on the structure via purlins these are the bearers that run left to right along the width of the roof the maximum purlin spacing for the corrugated profile is 800mm centres on the first and last purlins and 1 meter centres for the intermediate purlins.