Several kinds of purlins exist.
Roof purlins bunnings.
Cleated or bracketed fixing only no flange bolting.
The roof deck is the wood panel ply board or metal sheeting that creates the surface of the roof.
The purlins of a roof support the weight of the roof deck.
Max roof span allowed 12m.
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When made of wood it is usually covered with some sort of weatherproofing and sometimes an insulation material.
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Made from quality high tensile galvanized steel stratco purlins and girts can be supplied plain or punched.
Safe roof purlins spans.
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The safe spans below are suitable for sheds and class 1 structures with the following assumptions.
Cee zed 100mm purlins with a material thickness of 1 9mm.
Cpe 0 9 and cpi 0 2.
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.
High pressure zones kl 1 5 and 2 0 included.
C and z purlins.
Purlins traditionally support the roof deck cladding sheeting and are in turn supported by the principal rafters steel beams etc.
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Stratco manufacture a complete range of structural c and z section purlins and girts for a wide range of applications.
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Cee zed 100mm purlins with a material thickness of 1 5mm.
The above purlins are available in lengths from 1m up to 12m.
Check out our range of steel products at your local bunnings warehouse.
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