Purlin Accessories
Cleats, sleeves, anti-sag bars, side rails and the fixings that go with a purlin system.
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Cleader-Rail-Galv-16mm-3mCleader Rail Galvanised 1.6mm 3m
In stockPrice on applicationChoose options -
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Not sure which one you need?
Send us a photo of the existing roof or your drawings and we'll tell you exactly what matches, then price it at trade.
Purlin Accessories — common questions
What is the difference between a C section and a Z section?
A C section has both flanges facing the same way, so it sits neatly on its own and is the usual choice for single spans, side rails and end bays. A Z section has flanges facing opposite ways, which lets consecutive purlins overlap at the supports — that overlap makes the run behave as a continuous beam and lets it span further for the same weight of steel.
If in doubt on a multi-bay building, Z sections with sleeved or lapped joints are normally the more efficient answer.
How do I know what size purlin I need?
It comes from the span, the spacing between purlins, and the roof loading for the site. Guessing is expensive in both directions — too light and it deflects, too heavy and you have paid for steel you did not need.
Send us the span, the centres you are planning and what the roof build-up is, and we will size it.
Do you supply the cleats and bolts?
Yes, and they should be ordered with the purlins rather than afterwards, because the cleat has to suit both the purlin section and the steelwork it is bolting to.
Can purlins be cut to length?
Yes — they are cut and punched to order, so the holes land where your steelwork actually is. Send the setting-out and we will punch to it.