Purlins traditionally support the roof deck cladding sheeting and are in turn supported by the principal rafters steel beams etc.
Purlin roof system.
It is the simplest purlin system and can be used in inset and oversail configurations.
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The butted purlin system is suitable for all building types but is primarily used in single span applications.
This fully integrated system offers the ideal purlin and side rail gable solution for roofing and side cladding projects of all sizes and levels of complexity.
Non standard end configurations can be accommodated as required.
A common arrangement is a rafter and purlin system which combines purlins and rafters.
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.
Purlin roof structure civil engineering design in architecture or structural engineering or building a purlin or purline is a horizontal structural member in a roof.
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.