This will depend upon the type of panel that is used and the thickness of the steel.
Purlin spacing for 29 gauge metal roofing.
Metal roofing gauge sizes.
Fyi we run purlins on 3 5 feet on center depending on size of purlin.
When using purlins fabral recommends a maximum spacing of 24 on center note that 5v requires solid decking.
Do all roofing projects require 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.
Some people may believe that thicker is always better but whether it needs that added strength actually depends on the type of building construction as well as its location.
The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to.
22 24 26 29 when it comes to metal roofing gauges thicker typically means that the cost will be higher.
Kiln dried softwood is recommended for purlins or decking pine fir hemlock and spruce.
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.
Without a set of blueprints with a pe s seal you have no option but to follow the inspectors gig.
Screw line spacing for metal roofing over metal purlins.
R panel install manual metal roofing vinyl siding answer to the growing demand for metal roofing and siding needs.
We do recommend it however.
Once the purlin spacing is determined then the metal roofing panels are typically attached to every line of purlins.