Secondary Members
Secondary structural framing refers to purlins, girts, eave struts, wind bracing, flange bracing, base angles, clips and other miscellaneous structural parts.
Purlins, girts and eave struts are cold formed steel members which have a minimum yield strength of 345 MPa (50,000 psi) and will conform to the physical specifications of ASTM 572 (Grade 50) or ASTM A653 (Grade 50) or equivalent.
Key Performance Attributes
Load Transfer System
Transfers roof and wall loads safely from cladding elements to the primary structural frame.
High-Strength Steel
Manufactured from cold-formed steel with minimum yield strength of 345 MPa (50 ksi) as per ASTM standards.
Frame Stability Support
Includes bracing components that enhance lateral stability and structural performance.
Precision Fabrication
Factory-produced members ensure dimensional accuracy and consistent integration with the primary structure.
Purlins
Purlins designed to support roof loads and efficiently transfer them to the primary structural frame.
Thickness: 1.5-3.5mm | Depth: 120 300mm
Finish: Pre-galvanized 120-275gsm
Thickness: 1.5-3.5mm | Depth: 120 300mm
Finish: Pre-galvanized 120-275gsm
Steps
High-speed roll-forming machines create C and Z purlins with thickness ranging from 1.5 mm to 2.5 mm.
- Advantages: No surface scratches, rapid roller adjustment (2-3 min), consistent profile finish
- Equipment:
- C Purlin Forming Machine
- Z Purlin Forming Machine
Optional hole punching configurations tailored to project requirements.
Industrial-grade painting system for corrosion resistance and surface finish, similar to primary members.
Frequently asked Question
A PEB is a customized, factory-fabricated steel building system designed based on specific load, span, and functional requirements before being assembled on site.
In a PEB system, structural members are pre-designed and optimized through engineering software, then fabricated in controlled factory conditions, reducing material wastage and site work compared to conventional fabrication.
Design accounts for dead load, live load, wind load, seismic load, crane load (if applicable), and local code requirements before fabrication begins.
Primary members (columns and rafters), secondary members (purlins and girts), bracing systems, roof and wall cladding, and connection systems form the core structure.
All structural members are factory-fabricated and assembled on site using bolted connections, enabling faster and controlled erection.
Yes, PEB systems are typically designed to allow lengthwise or bay-wise expansion, subject to structural planning during the initial design stage.
Tapered built-up sections and optimized steel design reduce excess material usage while maintaining structural integrity.
Yes, when designed according to relevant codes, PEB structures can be engineered to meet seismic and wind load requirements.
Controlled manufacturing environments ensure dimensional accuracy, consistent welding quality, and adherence to design specifications
Span requirements, load conditions, intended usage, expansion needs, local climate, and compliance with building codes should be assessed.
