Purlins

Purlins

Premium C and Z purlins engineered for strength, speed of install, and long-term corrosion resistance — available in a full range of profiles and coatings to suit roofing, walling, and light structural applications.

Category Overview

This category brings together cold‑formed C section and Z section purlins designed for modern light‑steel construction: roofing, wall cladding, portal frames, single‑bay and multi‑bay buildings, and flooring systems. Products are offered cut to length, punched or un‑punched, and supplied in a range of standard depths to match common structural and cladding systems.

Key Features and Typical Uses

• C Section purlins are ideal for simple, non‑continuous span construction and are commonly specified for single bay roofs, simple portal frames, and straightforward girts and purlin lines.
• Z Section purlins are designed for continuous spanning and efficient lapping at internal supports, making them the preferred choice where continuous load paths and longer spans are required.
• Applications include roofing, wall cladding, portal frames, single and multi‑bay buildings, and light floor systems — suitable for contractors, builders, and fabricators seeking predictable performance and fast installation.

Materials, Coatings and Performance

• Purlins are roll‑formed from high‑tensile galvanised steel and are available in a variety of steel grades and gauges to match structural demands.
• Coating selection is critical: standard galvanised coatings are offered with a minimum protective finish suitable for many environments, while heavier coatings are recommended for corrosive conditions. For more aggressive environments, specify higher coating weights and consider additional protective measures such as powder coating.
• Available gauges and finishes cover contractor‑standard sizes to heavier duty options, enabling selection for both economy and higher load capacity projects.

Sizes and Section Range

• The range covers common Australian section depths and configurations, with C and Z profiles spanning typical sizes from C100 through C400 and corresponding Z profiles to match design needs.
• Standard catalogue designations and section properties are available for quick selection during estimating and structural design, enabling rapid specification and ordering for standard building modules.

Why Choose This Category

• Speed to site: cut‑to‑length supply and optional punching reduce onsite labour.
• Design flexibility: both C and Z profiles let you optimise for simple spans or continuous systems.
• Durability: high‑tensile steel and selectable galvanised coatings provide long service life when specified to the environment.
• Broad compatibility: sizes and gauges align with common cladding and framing systems used across residential, commercial and industrial projects.

Technical and Compliance Notes

• Purlins must be used in accordance with an engineer’s design; selection of profile, gauge and coating should reflect span, load, and environmental exposure.
• Detailed section properties, load tables and punching options are available to support structural design and procurement decisions.