Roof Purlin Support

In architecture or structural engineering or building a purlin or purline is a horizontal structural member in a roof.

Roof purlin support.

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. The roof support system is a ridgepole and either rafters which run perpendicular from the top of the walls to the ridge or purlins which run parallel to the ridge. A common arrangement is a rafter and purlin system which combines purlins and rafters. Purlins are supported either by rafters or the walls of the building.

Using a combination of rafters and purlins is common. 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 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. Purlins can be fixed to rafters and all joins and laps should be supported by a rafter.