Steel Purlin Purlin Spacing For Corrugated Roofing

The screws are spaced out so that every third corrugation has a screw.

Steel purlin purlin spacing for corrugated roofing.

C3 fix side laps and miss 2 hit 1 miss 3 hit 1 miss 2 etc with approved fasteners alone. 3 009 19 1 0019 1 5 12 in. End purlins and periphery of roof to be fixed every 2nd crest. All purlin joints must be supported by a rafter.

Corrugations should run in a straight line between the highest and lowest points and at a right angle to the purlins the intermediate supports. 15 23 75 12 in. See section on purlin girt spacing. Purlin spacing 23 75 in.

We do recommend it however. When positioned roof purlins should be spaced no further than 1 2 metres apart when using sheeting with a thickness of 0 7mm and 1 metre when using 0 5mm sheeting. Purlins provide horizontal support for the sheets and form part of the framework for the building. 15 3 12 in.

In order for the sheets to be easily fixed to the purlins as a rough guide they should be at least 50mm wide. For the lighter material such as lightweight aluminum the common spacing length is 4 inches of clear gap. Do all roofing projects require purlins. 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. Psf in purlin weight based on 43 g nds. Minimum recommended purlin size is 4 x 2 50mm x 100mm in timber or z140mm x 1 6mm in steel. Z purlins are connected to the rafters using cleats.

There will be four screws per screw line placed in the high of the corrugated panel. If you want to know how to support roof purlins they are usually supported by 2 4 or 2 6 struts or posts. For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet. The overlaps ends and sides depends upon the sloop of the roof see below.

7 25 12 in. Note compliance with e2 as1 is dependent on purlin spacing and gauge of roofing. 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.

Minimum purlin size will vary according to span. The typical roof structure now consists of steel i beam rafters placed approximately 10 feet this varies depending on purlin size and other variables apart with either 4 6 or 8 lightweight steel purlins installed horizontally across the rafters. For 2x6s purlins the posts are spaced in 6 feet distance. Corrugated sheet roofing material is widely available and easy to use.

The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. End purlins and periphery of roof to be fixed every 2nd crest. 3 1 43 lbs ft.