Secondary Members – Purlin Systems
Our Secondary Members provide crucial support and stability to the primary framework, ensuring optimal load distribution and structural performance across your entire building structure.
What Are Secondary Members?
Secondary Members are essential components that work in conjunction with primary steel members to provide comprehensive structural support. These cold-formed steel sections distribute loads efficiently, improve building stability, and enhance overall structural performance across the entire building envelope.
Secondary Member Components
Purlins (C & Z Sections)
Roll-formed steel sections that support roof sheeting and provide lateral stability to the entire structural system.
- Z-Purlins: 200mm deep, 64mm flanges, 16mm stiffening lips
- C-Purlins: 200mm deep, 100mm flanges, 24mm stiffener lips
- Minimum yield strength: 345 MPa (50,000 psi)
- Thicknesses: 1.5mm, 1.75mm, 2.0mm, 2.25mm, 2.5mm, 3.0mm
Wall Girts
Cold-formed Z-shape members providing support for wall cladding and contributing to the building's lateral stability system.
- Designed for vertical wall support
- Multiple depth options available
- Enhanced lateral load resistance
- Compatible with all cladding systems
Eave Struts
Specialized members located at the intersection of sidewall and roof planes, transmitting longitudinal wind forces and maintaining structural continuity.
- Strategic placement at eave locations
- Transmits wind forces effectively
- Maintains structural connection integrity
- Ensures continuity of load paths
Bracing Systems
Including wind bracing, flange bracing, and cable bracing systems that ensure building stability against lateral forces.
- Wind bracing for lateral stability
- Flange bracing for column support
- Cable bracing systems available
- Seismic and crane load resistance
Quality Standards
All secondary members conform to ASTM A607 Grade 50 specifications with superior corrosion protection measures.
- ASTM A607 Grade 50 compliance
- Pre-galvanized finish options
- Factory-painted alternatives
- 35 microns corrosion protection primer
Custom Configurations
Flexible design options allowing customization to match specific structural and architectural requirements of your project.
- Tailored depth specifications
- Custom thickness options
- Specialized attachment details
- Project-specific engineering
Detailed Purlin Specifications
Z-Purlin Specifications
- Depth: 200mm
- Flange Width: 64mm
- Stiffening Lips: 16mm
- Yield Strength: 345 MPa minimum
- Available Thicknesses: 1.5mm - 3.0mm
- Optimal for sloped roof applications
C-Purlin Specifications
- Depth: 200mm
- Flange Width: 100mm
- Stiffener Lips: 24mm
- Yield Strength: 345 MPa minimum
- Available Thicknesses: 1.5mm - 3.0mm
- Ideal for wall and roof support
Why Choose Our Secondary Members?
✓ Superior Load Distribution
Engineered to efficiently distribute loads across the primary frame, ensuring optimal structural performance and safety.
✓ Precision Manufactured
Cold-formed with CNC equipment to exact specifications, ensuring perfect fit during assembly and installation.
✓ Lateral Stability
Comprehensive bracing systems provide superior resistance to wind, seismic, and crane loading forces.
✓ Corrosion Protection
Pre-galvanized finish or factory-painted with 35 microns protective primer for long-term durability.
✓ Multiple Options
Multiple section types, depths, and thicknesses available to match any architectural or structural requirement.
✓ Cost Efficient
Optimized design minimizes material usage while maintaining full structural integrity and load capacity.
Material Excellence & Engineering Precision
Our Secondary Members are manufactured using premium structural steel conforming to international standards, with advanced quality control throughout the manufacturing process.
Steel Specifications:
- ASTM A607 Grade 50 - Primary specification for all secondary members
- Yield Strength: Minimum 345 MPa (50,000 psi)
- Tensile Strength: 450+ MPa for enhanced durability
- Cold-rolled precision formed with tight tolerances
Finish & Corrosion Protection:
- Pre-galvanized coating: 70-100 microns minimum
- Factory-painted option: 35 microns corrosion protection primer
- Zinc-rich epoxy primer for enhanced protection
- Superior performance in coastal and industrial environments
Purlin Section Sizing Guide
| Purlin Type | Depth | Flanges | Available Thickness | Load Capacity | Certification |
|---|---|---|---|---|---|
| Z-Purlin | 200mm | 64mm x 16mm lip | 1.5mm - 3.0mm | Up to 15 kN/m | ASTM A607 |
| C-Purlin | 200mm | 100mm x 24mm lip | 1.5mm - 3.0mm | Up to 20 kN/m | ASTM A607 |
| Wall Girt | 150-250mm | Customizable | 1.5mm - 3.0mm | Custom design | ASTM A607 |
| Eave Strut | 200-300mm | Customizable | 2.0mm - 3.0mm | Custom design | ASTM A607 |
Key Advantages of Our Secondary Members
Quick Installation
Precision-formed sections enable fast assembly with standard bolted connections, reducing on-site labor and construction time.
Cost Savings
Efficient design minimizes material usage and installation complexity, reducing overall project costs significantly.
Structural Stability
Comprehensive bracing and support systems ensure superior resistance to wind, seismic, and dynamic loading.
Long-Term Durability
Pre-galvanized or painted finish provides decades of protection in any climate or industrial environment.
Design Flexibility
Multiple section types and sizes available to match any architectural design or structural requirement.
Precision Quality
CNC-controlled manufacturing ensures millimeter-level accuracy with consistent quality throughout production.