Purlin Spacing For Corrugated Roofing

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.

Purlin spacing for corrugated roofing.

1 in 4 or less over 15 degrees purlins at 600mm spacing. Correctly measure the spacing of furring strips for a metal roof to further decrease condensation. For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet. The typical spacing standards for residential and commercial buildings are about 1 to 2 foot.

We do recommend it however. Do all roofing projects require purlins. 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. The diagram above is a typical 37 wide panel and the spacing works out perfectly.

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. Twenty four inches is a common spacing of furring strips for a metal roof. 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. In some cases however the exact spacing of the rafters doesn t matter if the roof has other means of supporting the metal panels.

The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. There will be four screws per screw line placed in the high of the corrugated panel. However sometimes corrugated sheets are 39 wide instead of 37 wide. 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.

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