Purlin Roof Definition

In steel construction the term purlin typically refers to roof framing members that span parallel to the building eave and support the roof decking or sheeting.

Purlin roof definition.

A common arrangement is a rafter and purlin system which combines purlins and rafters. Also known as sheeting rails purlins create the roofing members of the secondary framing of a steel building. These structural supports run perpendicular across the rafter beams. There is no direct connection between roof sheathing and truss top chord.

Of uncertain origin collins english dictionary complete and unabridged 12th edition 2014 harpercollins publishers 1991 1994 1998 2000 2003 2006 2007 2009 2011 2014. The roof beams spanning between the trusses are known as purlins. Uniformly distributed roof load is carried by purlins. Building a horizontal beam that provides intermediate support for the common rafters of a roof construction.

In architecture or structural engineering or building a purlin or purline is a horizontal structural member in a roof. Roof sheets are connected with purlins. 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. Purlin definition a longitudinal member in a roof frame usually for supporting common rafters or the like between the plate and the ridge.

A horizontal member in the roof. 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 purpose of purlins. Purlins are connected with panel points of the truss.

The purlins are in turn supported by rafters or walls. Purlins are an important component in a pre engineered steel structural kit. 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.