Purlins & Girts C Sections
C-shaped cold-formed steel members designed for superior strength, torsional resistance, and flexibility in structural framing. Engineered for optimal performance in roof and wall applications.
Quick Specifications
6" - 14"
- Depth Range
12-16 Gauge
- Steel Thickness
50-55 ksi
- Yield Strength
20' - 45'
- Standard Lengths
Nested
- Shipping
Product Overview
CFT’s C-section purlins and girts combine the structural efficiency of the C-shape with precision roll-forming technology. These members provide exceptional load-carrying capacity with superior torsional resistance, making them ideal for long-span applications in industrial and commercial construction.
Key Advantages
- Enhanced torsional stability over Z-sections
- Superior lateral-torsional buckling resistance
- Optimized section modulus for bending
- Consistent performance across all span conditions
- Simplified connection details
- Reduced bridging requirements
Material Properties
- ASTM A653 Grade 50 structural steel standard
- ASTM A792 Grade 55 available for enhanced performance
- G90 galvanized coating for corrosion protection
- Minimum yield strength: 50,000-55,000 PSI
- Tensile strength: 65,000-70,000 PSI
Standard C-Section Dimensions
|
Depth (in)
|
Flange (in)
|
Lip (in)
|
Gauge
|
Weight (lb/ft)
|
|---|---|---|---|---|
|
6
|
2.000
|
0.750
|
16
|
1.70
|
|
8
|
2.500
|
0.750
|
14
|
2.59
|
|
10
|
2.500
|
0.875
|
14
|
3.09
|
|
12
|
3.000
|
0.875
|
12
|
4.49
|
|
14
|
3.500
|
1.000
|
12
|
5.41
|
Structural Performance
- Simple span capability: Up to 40 feet
- Continuous span: Up to 60 feet
- Load capacity: 40-200 PSF (varies by configuration)
- Deflection limit: L/240 under service loads
- Wind uplift resistance: Up to 120 PSF
- Seismic performance: Ductile detailing available
Applications & Design
Heavy-Duty Roof Applications
C-section purlins excel in applications requiring maximum load capacity and minimal deflection. Their superior torsional properties make them the preferred choice for heavy roofing systems and long-span structures.
High-Performance Applications
- Industrial facilities with heavy equipment loads
- Snow load regions requiring enhanced capacity
- Long-span structures with minimal intermediate support
- Seismic zones requiring ductile performance
- Green roof systems with soil and vegetation loads
- Solar panel mounting applications
Load Performance Benefits
- Higher allowable loads compared to Z-sections
- Reduced deflection under service loads
- Superior performance under combined loading
- Enhanced fatigue resistance for dynamic loads
- Consistent behavior across temperature variations
Wall System Excellence
As wall girts, C-sections provide unmatched lateral support for cladding systems while efficiently transferring wind and seismic loads to the structural frame. Their torsional rigidity reduces twist and improves cladding performance.
Wall System Benefits
- Superior wind load resistance for tall buildings
- Reduced out-of-plane deflection
- Enhanced support for heavy cladding systems
- Improved seismic performance and ductility
- Better thermal performance with reduced bridging
- Simplified installation and alignment
Cladding Compatibility
- Architectural metal panel systems
- Insulated metal panels (IMP)
- Precast concrete panel support
- Curtain wall and storefront systems
- Masonry veneer applications
- EIFS and stucco systems
Design & Engineering Support
CFT provides comprehensive engineering support for C-section applications, including custom design analysis, connection details, and performance optimization for specific project requirements.
Engineering Services
- Custom load analysis and span optimization
- Connection design and detailing
- Seismic design and ductile detailing
- Thermal analysis and energy modeling
- Wind tunnel testing coordination
- Fatigue analysis for dynamic applications
Design Tools & Resources
- Comprehensive load tables and span charts
- CAD details and 3D models
- Structural analysis software integration
- Installation guidelines and best practices
- Quality control and inspection procedures
- Technical support throughout project lifecycle
Custom Engineering Solutions
Let our structural engineering team optimize your C-section design for maximum performance and cost efficiency.