Residential C Purlins Roof Design
Welded together they can be used as columns braces and ties.
Residential c purlins roof design. 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. Civil engineering design in architecture or structural engineering or building a purlin or purline is a horizontal structural member in a roof. 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. 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.
The plane surface of c purlin on its one side has made it a preferred material for cladding due to its easy installation on concrete structures or steel. How to design c purlins and sag rods design according to nscp 2015 c purlinsare horizontal type steel section that are used to support the load from the roof deck or the sheathing. Steeline c purlins are available in different sizes and material strengths to match the design specification of your building. The shape of cee purlins does not allow end lapping they are butted together.
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.