Purlins Spacing For Metal Roofing

Purlin spacing is dependent on profile of the metal and gauge plus snow and wind load plus what the rafters are designed to carry.

Purlins spacing for metal roofing.

By the standard the most used placement of purlin span for metal roof is five foot intervals. Screw line spacing for metal roofing over metal purlins this will depend upon the type of panel that is used and the thickness of the steel. Purlins need to follow the sides edges of the roof it is important to note that in addition to the. Once the purlin spacing is determined then the metal roofing panels are typically attached to every line of purlins.

Purlins fabral recommends a maximum spacing of 24 on center note that 5v requires solid decking. Without a set of blueprints with a pe s seal you have no option but to follow the inspectors gig. The typical spacing standards for residential and commercial buildings are about 1 to 2 foot. The metal roofing panels shown in this manual require a mini mum slope of 2 per foot to ensure proper drainage.

Refer to the rain. For the lighter material such as lightweight aluminum the common spacing length is 4 inches of clear gap. Doubling up in the valleys refer to the installation manual for the proper on center spacing and be sure that the. Fyi we run purlins on 3 5 feet on center depending on size of purlin.

If the space between posts is greater than 8 feet then brace is needed to avoid buckling. Purlin spacing for metal roofing. However it is important to note that expected load is a crucial factor while determining this. For 2x6s purlins the posts are spaced in 6 feet distance.