CZ Section Purlins & Girts
High-strength cold-formed CZ section purlins and girts manufactured from premium galvanized or hot-rolled steel strip. Featuring a lightweight profile, high section modulus, superior load capacity, and outstanding corrosion resistance. C-purlins provide versatile support for single spans and wall framing, while Z-purlins allow continuous lapping for max efficiency over long spans. Factory pre-punched for fast bolt-assembly, widely used for roof and wall framing in industrial plants, warehouses, and steel structures.
Categories: Secondary Structural Systems
CZ Section Purlins & Girts
CZ section purlins and girts are secondary structural framing members cold-formed from high-strength galvanized or hot-rolled steel strip. Designed to support roof and wall cladding, C-purlins excel in single-span and wall-framing applications, while Z-purlins enable continuous overlapping to maximize structural efficiency and load capacity across long-span buildings.
- Raw Material Options: Premium hot-dip galvanized steel strip, hot-rolled steel strip, or cold-rolled steel with custom painted finishes.
- Zinc Coating Protection: Galvanized zinc coating weight options from Z120 to Z275 (g/m²), offering superior salt-spray and weather corrosion resistance.
- Dimensional Ranges: Web height (H) from 80mm to 350mm; Flange width (B) from 40mm to 80mm; Thickness (t) from 1.5mm to 3.5mm; custom lengths up to 12 meters.
- Industrial Plants & Warehouses: Secondary roof purlins and side-wall girts supporting corrugated steel sheets or insulated sandwich panels.
- Logistics Centers & Superstores: Structural framing systems for large-span commercial spaces, distribution hubs, and exhibition halls.
- Agricultural & Livestock Buildings: Corrosion-resistant roof and wall framework for greenhouses, barns, and storage sheds.
- Prefab & Modular Structures: Lightweight framing components for modular housing, equipment enclosures, and site offices.
- Continuous Lapping Efficiency (Z-Purlin): Overlapping Z-purlins at support points increases continuous load capacity by 20% to 30% compared to simple spans, reducing steel consumption.
- Maintenance-Free Weatherability: High-zinc galvanized surface prevents rust and corrosion, eliminating site painting costs and ensuring long service life.
- Compact Packaging & Freight Savings: Nestable design (especially Z-purlins) allows dense stacking, maximizing container loading capacity and lowering shipping costs.
- Lapping Length Compliance: Ensure Z-purlin lap joint lengths strictly follow engineering design drawings (typically 1.5 to 2.0 times the purlin web height).
- High-Strength Fastener Use: Secure purlins to primary rafters/columns using certified galvanized bolts and anti-loosening washers to withstand wind uplift.
- Storage & Water Prevention: Store purlin bundles off the ground on sloped dunnage to prevent standing rainwater accumulation during job site storage.
