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.
Roof purlin support.
Using a combination of rafters and purlins is common.
How to support roof purlins.
A common arrangement is a rafter and purlin system which combines purlins and rafters.
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.
In architecture or structural engineering or building a purlin or purline is a horizontal structural member in a roof.
Purlins can be fixed to rafters and all joins and laps should be supported by a rafter.
Purlins are supported either by rafters or the walls of the building.
In architecture structural engineering or building a purlin or historically purline purloyne purling perling is a horizontal beam or bar used for structural support in buildings most commonly in a roof.