Purlins Spacing For Metal Roofing

An engineer will use a load chart in order to determine the spacing between metal purlins.

Purlins spacing for metal roofing.

For 2x6s purlins the posts are spaced in 6 feet distance. For the lighter material such as lightweight aluminum the common spacing length is 4 inches of clear gap. What do i need to know about installing purlins for my metal roofing project. By the standard the most used placement of purlin span for metal roof is five foot intervals.

For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet. The metal roofing panels shown in this manual require a mini mum slope of 2 per foot to ensure proper drainage. Purlins need to follow the sides edges of the roof it is important to note that in addition to the. Purlins fabral recommends a maximum spacing of 24 on center note that 5v requires solid decking.

However it is important to note that expected load is a crucial factor while determining this. Doubling up in the valleys refer to the installation manual for the proper on center spacing and be sure that the. Purlin spacing is dependent on profile of the metal and gauge plus snow and wind load plus what the rafters are designed to carry. Fyi we run purlins on 3 5 feet on center depending on size of purlin.

The typical spacing standards for residential and commercial buildings are about 1 to 2 foot. Purlin spacing for metal roofing. If the space between posts is greater than 8 feet then brace is needed to avoid buckling. Without a set of blueprints with a pe s seal you have no option but to follow the inspectors gig.