Purlin Spacing For Metal Roofing

Standard gage are generally used for roofing.

Purlin spacing for metal roofing. In the order shown above purlins laying flat use 2 20d ring shank nails per connection for trusses with minimal spacing hung purlins for wide span trusses lu26 hangers for 2 6 lu28 hangers for 2 8 etc and purlins on edge overlapped not butted for mid range to wide span trusses 8 or 9 spacings installed with 1 60d galvanized ring shank nail. Purlins need to follow the sides edges of the roof it is important to note that in addition to the. R panel install manual metal roofing vinyl siding answer to the growing demand for metal roofing and siding needs. The spacing of purlins on roofs and girts on wall is usually 4 to 6 ft.

Without a set of blueprints with a pe s seal you have no option but to follow the inspectors gig. Fyi we run purlins on 3 5 feet on center depending on size of purlin. Purlin spacing for metal roofing. Doubling up in the valleys refer to the installation manual for the proper on center spacing and be sure that the.

Screw line spacing for metal roofing over metal purlins. What do i need to know about installing purlins for my metal roofing project. Numbers 20 and 22 u s. For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet.

For the lighter material such as lightweight aluminum the common spacing length is 4 inches of clear gap. By the standard the most used placement of purlin span for metal roof is five foot intervals. For 2x6s purlins the posts are spaced in 6 feet distance. Once the purlin spacing is determined then the metal roofing panels are typically attached to every line of purlins.

The typical spacing standards for residential and commercial buildings are about 1 to 2 foot. An engineer will use a load chart in order to determine the spacing between metal purlins. Purlin spacing is dependent on profile of the metal and gauge plus snow and wind load plus what the rafters are designed to carry. This will depend upon the type of panel that is used and the thickness of the steel.

However it is important to note that expected load is a crucial factor while determining this.