Steel Purlins
Steel purlins are horizontal structural elements in a roof framework, providing support for the roof covering and transfer loads to the main structural frame. They play a crucial role in maintaining the stability and integrity of a building’s roofing system.
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Types of Steel Purlins
C Purlins
Learn MoreC purlins are horizontal structural steel sections widely used in roofing and wall framing due to their ‘C’ shaped cross-section. Made of durable, lightweight steel, they offer excellent strength-to-weight ratios, supporting roof loads efficiently.
Z Purlins
Learn MoreZ-purlins are structural steel sections shaped like the letter ‘Z’ in profile, whose unique form provides enhanced stability and strength that enables support for heavier loads across broader spans, making them ideal for vast industrial or commercial constructions.
Available Steel Purlin Sizes & Specifications
C and Z purlins are available in a comprehensive range of heights and thicknesses to suit light to heavy roof and wall cladding loads. For complete technical data — including all sizes, masses, and weights per 6m — download the 2026 Product Handbook.
- C-Purlins in 3″, 4″, 6″, and 7″ heights — ASTM A653/A570M
- Z-Purlins in 3″, 4″, 6″, and 7″ heights — matching C-purlin range
- Thicknesses from 0.65mm to 2.0mm — over 12 thickness options per size
- Standard 6-meter lengths — hot-dip galvanized and bare options available
- Designed for Philippine typhoon wind loads and tropical roofing conditions
Common Questions
Frequently Asked Questions
Which is stronger, C or Z purlins?
Z purlins are generally stronger than C purlins because their shape provides better load distribution and overlap at supports, making them more suitable for longer spans and heavier loads. C purlins, on the other hand, are commonly used for lighter applications and shorter spans.
Are steel purlins the same with steel channels?
No, steel purlins and steel channels are not the same, although they may look similar.
Purlins are specifically designed to support roof and wall systems in construction, typically with features that allow easy connection and overlapping. Steel channels, on the other hand, are more general-purpose structural sections used for a variety of framing and support applications.
Can steel purlins be used on heavy roofing systems?
Yes, steel purlins can be used for heavy roofing systems when properly designed and specified. Their strength and load-bearing capacity make them suitable for supporting roofing materials, provided that the correct size, thickness, and spacing are used based on the structural requirements.
Source Purlins for Your Roof Framing
Share the purlin profile, thickness and quantity specified for your roof. We’ll help check steel purlin options and discuss any finish or length requirements needed for your quotation.
