High-Tensile Cold-Rolled Galvanized Purlins
Exact CNC Punching • Continuous Lap Joint
Precision Secondary Framing Engineered for Structural Integrity
C and Z Purlins are high-tensile, cold-formed steel sections designed as the essential secondary framing for pre-engineered building roofs and walls. By transferring loads from the roof and wall cladding directly to the primary structural frames, purlins ensure structural rigidity, optimal wind load resistance, and uniform distribution of structural forces.
Gapat Engineering manufactures custom C and Z purlins using computerized roll-forming lines with pre-punched holes for sag rods, eave struts, and flange connections. This eliminates on-site drilling, reduces erection labor costs, and guarantees exact alignment for fast, seamless installation.
C-Purlin Profile
- Self-supporting profile ideal for single-span framing
- Exceptional performance for wall girts & door headers
- Clean, straight edges for flush architectural finishes
- Highly adaptable for mezzanine floor secondary joists
Z-Purlin Profile
- Overlapping profile creates continuous multi-bay spans
- Increases load capacity at intermediate support joints
- Optimized for high-pitch industrial roof slopes
- Reduces total steel tonnage by up to 20%
CNC Punching & Detailing
- In-line CNC punched round and slotted holes
- Zero field measuring or torch cutting required
- Custom hole centers matching client design drawings
- Exact dimensions minimize site erection errors
Anti-Corrosive Protection
- Hot-dip galvanized zinc coating (120 to 275 GSM)
- Superior protection in humid & chemical atmospheres
- Minimal long-term maintenance requirements
- Available in Bare GI or specialized primers
C & Z Purlin Technical Specifications
IS 811 • IS 2062 • ASTM A653| Material Grade | High-Tensile Cold-Rolled Galvanized Steel (Yield: 245–350 MPa / Tensile: 450 MPa) |
|---|---|
| Depth (Web) Range | 100 mm to 350 mm |
| Flange Width | 40 mm to 90 mm |
| Lip Dimensions | 15 mm to 25 mm |
| Thickness Options | 1.5 mm, 1.8 mm, 2.0 mm, 2.5 mm, up to 3.0 mm |
| Zinc Coating | 120 GSM, 180 GSM, up to 275 GSM Hot-Dip Galvanized |
| Available Lengths | Custom cut to exact structural spans up to 14+ meters |
Applications & Usages
PEB Roof Purlin Framing
Wall Girts & Fascias
Mezzanine Floor Joists
Solar Panel Structures
Factory Sheds & Extensions
Door Headers & Framed Openings