Roof Purlin Beam

Like the z purlin the c purlin takes its name from its shape.

Roof purlin beam.

In a structural steel shed the main portal frames and roof rafters are made from strong steel sections which are welded together and later bolted together. Purlins traditionally support the roof deck cladding sheeting and are in turn supported by the principal rafters steel beams etc. 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 and girts are used longitudinally to support the roof sheeting which they were originally designed for.

Purlins are supported either by rafters or the walls of the building. In homes with full second floors the main level ceilings often use log beams for overhead looks and to support the ceiling which is also the upper level floor. With this layout the upper level which is typically framed construction rather than log the ceiling slash roof can use rafters and purlins to add log elements. Available in a variety of sectional properties lengths and sizes.

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