Residential C Purlins Roof Design

Steeline c purlins are made from quality galvaspan steel and are roll formed to length with holes punched to your specification.

Residential c purlins roof design.

Cee purlins are secondary steel framing members most commonly used as roof purlins wall girts and header jamb and sill for windows and doors on metal buildings. Civil engineering design in architecture or structural engineering or building a purlin or purline is a horizontal structural member in a roof. In timber construction purlins are nailed to the rafter or supporting trusses while in steel roof construction they are welded or bolted to the rafters or trusses by the means of cleats. In the past the majority of roof structures were of wooden construction but over the past 15 to 20 years there has been a vast shift away from wood to metal mainly steel roof construction.

The shape of cee purlins does not allow end lapping they are butted together. Welded together they can be used as columns braces and ties. Purlins traditionally support the roof deck cladding sheeting and are in turn supported by the principal rafters steel beams etc. Roof purlin are members used to directly support roof sheeting materials and could be made of timber or steel.

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.