Purlin Spacing For Metal Roofing

For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet.

Purlin spacing for metal roofing.

For the lighter material such as lightweight aluminum the common spacing length is 4 inches of clear gap. Screw line spacing for metal roofing over metal purlins. What do i need to know about installing purlins for my metal roofing project. Once the purlin spacing is determined then the metal roofing panels are typically attached to every line of purlins.

R panels provide for attachment to metal purlins a minimum of 12 x 1 hex head tek for 2 foot spacing between rows of screws multiply the total linear feet of metal times 1 9 retrieve content. Doubling up in the valleys refer to the installation manual for the proper on center spacing and be sure that the. Purlin spacing for metal roofing. The spacing of purlins on roofs and girts on wall is usually 4 to 6 ft.

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. 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. This will depend upon the type of panel that is used and the thickness of the steel.

Load tables specifying safe loads for different spans are available from metal deck manufacturers. For 2x6s purlins the posts are spaced in 6 feet distance. An engineer will use a load chart in order to determine the spacing between metal purlins. Numbers 20 and 22 u s.

Purlins need to follow the sides edges of the roof it is important to note that in addition to the. However it is important to note that expected load is a crucial factor while determining this. Without a set of blueprints with a pe s seal you have no option but to follow the inspectors gig. If the space between posts is greater than 8 feet then brace is needed to avoid buckling.

By the standard the most used placement of purlin span for metal roof is five foot intervals.