Purlin C

Steeline C Purlins are an ideal product that provide long spans between portal frames on your commercial building. Steeline C Purlins are available in different sizes and material strengths to match the design specification of your building. Steeline C Purlins are made from quality Galvaspan® steel and are roll formed to length with holes punched to your specification.

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Projects made easy

Projects made easy

As specialists in all things steel, we can assist with your entire project from start to finish. From ideas to advice, installation and everything in between, Steeline offers a full range of services to make projects a breeze.

Free expert advice

Free expert advice

Not sure where to start? Our trained experts can answer any questions, no matter how big or small. You can call your local Steeline team for advice, or request a free quote anytime.

Superior quality and performance

Superior quality and performance

Manufactured right here in Australia from only the best BlueScope steel, our tried and tested products are guaranteed to last well into the future.


Steeline C Section Structural Purlins are mainly used for commercial applications but are just as cost effective to be used for smaller type garages and carports. The C sections can also form part of the columns and rafters in these smaller applications.

Safe roof purlins spans

The safe spans below are suitable for sheds and class 1 structures with the following assumptions:

Non-cyclonic sites only

Cpe = 0.9 and Cpi = +0.2

High Pressure Zones KL = 1.5 and 2.0 included

Max roof span allowed – 12M

All Spans to have 1 row of bridging

Cleated or bracketed fixing Only – No flange bolting

Results are for at least two spans

Full calculation of requirements using Steeline section properties should be carried out for full verification.

DISCLAIMER: These span tables are to be used as a guide only. Independant engineering is required for purlins and girts, and is not available on this site.


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