Purlins are installed horizontally under metal roofs.
Purlins roof support.
Purlins are 2 by 4 feet and are installed much like metal roofing.
Once your purlins have been fitted and a supporting framework has been created you should look to carry out an inspection before you continue work.
With rafters it runs in perpendicular from the walls to the ridge while with purlins it runs to the ridge in parallel.
In architecture or structural engineering or building a purlin or purline is a horizontal structural member in a roof.
The support system for the roof is comprised of ridgepole and rafters or purlins.
How to support roof purlins purlins can be fixed to rafters and all joins and laps should be supported by a rafter.
Using a combination of rafters and purlins is common.
Purlins support the loads from the roof deck or sheathing and are supported by the principal rafters and or the building walls steel beams etc.
Purlins are 2 by 4 feet and are installed much like metal roofing.
Step 1 run a tape measure from end to end along the rafters of the roof to determine how many purlins will be needed for installation.
They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top.
Cee purlins are secondary steel framing members used for roof and wall support as well as a header sill brace and more.