Purlins
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Purlins are structural sections of a roof used to support roof sheeting. They are mostly used in rural, agricultural and industrial structures. There are two main profiles, C purlins and Z purlins. Both can be used in single spans in roof structures. C purlins can continuously span across roof structures whereas Z purlins can also be lapped to increase their capacity and strength.
Dynamic Steelform provides a comprehensive purlin rolling service. We offer a range of sizes and thicknesses to ensure our purlins match your needs exactly. Our purlins are cut to length and available punched or unpunched. Not only does this make installation simple but it also leaves a professional finish.
We manufacture our purlins using high tensile, galvanised steel. A Z350 coating is applied to protect against environmental damage.
C Purlin
Dynamic Steelform C sections are rolled using BlueScope steel. C purlins are best used for single spans construction. Portal frame warehouses and roofing are some examples of their structural application.
C Profile Dimensions:
| Catalogue Number | t (mm) | D (mm) | B (mm) | L (mm) | Mass per unit length kg/m |
|---|---|---|---|---|---|
C10012 |
1.2 |
102 |
51 |
12.5 |
2.10 |
C10015 |
1.5 |
102 |
51 |
13.5 |
2.62 |
C10019 |
1.9 |
102 |
51 |
14.5 |
3.29 |
C15012 |
1.2 |
152 |
64 |
14.5 |
2.89 |
C15015 |
1.5 |
152 |
64 |
15.5 |
3.59 |
C15019 |
1.9 |
152 |
64 |
16.5 |
4.51 |
C15024 |
2.4 |
152 |
64 |
18.5 |
5.70 |
C20015 |
1.5 |
203 |
76 |
15.5 |
4.49 |
C20019 |
1.9 |
203 |
76 |
19.0 |
5.74 |
C20024 |
2.4 |
203 |
76 |
21.0 |
7.24 |
C25019 |
1.9 |
2.54 |
76 |
18.5 |
6.50 |
C25024 |
2.4 |
254 |
76 |
20 |
8.16 |
Z Purlin
Z purlins are strong, steel beams shaped like a “Z” that support the roof and walls of a building shell structure. They provide a sturdy framework for roofing materials and ensure it is firmly attached and safely in place. These purlins are made with high-tensile galvanised steel and a distinctive “Z” shape to provide excellent strength and rigidity.
Dynamic Steelform Z sections are also rolled using BlueScope steel. Z-section purlins have two flanges. These are used to lap at the internal supports which allows for continuous span construction. The lapping ability of Z purlins increases their support strength. These are most commonly used on the shell structure of roofs and walls.
Z Profile Dimensions:
| Catalogue Number | t (mm) | D (mm) | E (mm) | F (mm) | L (mm) | Mass per unit length kg/m |
|---|---|---|---|---|---|---|
Z15012 |
1.2 |
152 |
65 |
61 |
15.5 |
2.89 |
Z15015 |
1.5 |
152 |
65 |
61 |
16.5 |
3.59 |
Z15019 |
1.9 |
152 |
65 |
61 |
17.5 |
4.51 |
Z15024 |
2.4 |
152 |
65 |
60 |
19.5 |
5.70 |
Z20015 |
1.5 |
203 |
79 |
74 |
15.0 |
4.49 |
Z20019 |
1.9 |
203 |
79 |
74 |
18.5 |
5.74 |
Z20024 |
2.4 |
203 |
79 |
73 |
21.5 |
7.24 |
Z25019 |
1.9 |
254 |
79 |
74 |
18.0 |
6.50 |
Z25024 |
2.4 |
254 |
79 |
74 |
18 |
8.16 |
Purlin Frequently Asked Questions
Purlins are horizontal beams used along the length of a roof to support the roof’s rafters or decking and are used to prevent a roof from sagging under its own weight.
Rafters are sloped beams usually made from wood or steel that run from the roof’s ridge to the eaves. They are designed to provide support for the external roofing material. Purlins are beams that are placed in a perpendicular direction to the rafters.
Please contact us on 08 9434 6888 or send an email to framing@dynamicsteelform.com.au for more details and prices.