Product Title

 
Longze Punched Carbon Steel C-Channel | Photovoltaic Roof Racking Purlins | Professional Solar Fastener Manufacturer

Product Summary

Longze Galvanized C-Shaped Steel Solar Mounting Brackets are high-performance Photovoltaic Roof Racking Purlins designed for industrial, commercial, and utility-scale solar arrays. Manufactured from

structural-grade Q235B/Q355B Carbon Steel, these Punched C-Channels provide the ultimate load-bearing framework for solar modules, ensuring structural stability under extreme environmental stress.

• ✔ Structural Purlin Strength: Engineered to function as primary horizontal supports (purlins), offering high resistance to downward snow pressure and upward wind suction.
  
  

• ✔ Precision Punched Holes: Features CNC-punched slots for rapid, tool-free alignment with Solar Mounting Brackets, significantly reducing on-site labor costs.
  
  

• ✔ Heavy-Duty HDG Coating: Finished with a minimum 65μm - 85μm Hot-Dip Galvanized layer, providing superior sacrificial protection against rust in industrial and coastal zones.

• Standards: DIN 6923, ISO 4161, ASME B18.16.4.
  
  

• Material: Q235B, Q355B Carbon Steel (High-Strength Structural Grade).
  
  

• Surface Finish: Hot-Dip Galvanized (HDG) / ZAM (Zinc-Magnesium-Aluminum) / Powder Coated.
  
  

• Application: Solar Purlin Systems, Industrial Roof Racking, Ground-Mount Foundations.
  

• Mechanical Properties & Material Hardness
  Certified tensile and yield strength for C-Channel Purlin structures.
  

• Material Grade	Tensile Strength (Rm)	Yield Strength (ReH)	Elongation (A80)	Hardness (HB)
  Q235B (Standard)	370 - 500 MPa	≥ 235 MPa	≥ 26%	120 - 150 HB
  Q355B (High-Tensile)	470 - 630 MPa	≥ 355 MPa	≥ 21%	150 - 180 HB
  SUS 304 (Bolts)	≥ 700 MPa	≥ 450 MPa	≥ 30%	140 - 200 HV

• C-Channel Purlin Specifications & Loading
  

• Precision dimensioning for Photovoltaic Roof Racking structures.

• Profile Size (mm)	Wall Thickness	Standard Length	Max Wind Load	Max Snow Load
  41 x 41 (Standard)	2.0 - 2.5 mm	3000 / 6000 mm	60 m/s	1.5 KN/m²
  41 x 62 (Deep)	2.5 mm	Customized	70 m/s	2.0 KN/m²
  80 x 40 (Purlin)	2.5 - 3.0 mm	Customized	80 m/s	2.5 KN/m²

• Surface Treatment & Environment Testing
  

• 25-year corrosion resistance for solar purlin systems.

• Coating Type	Process	Coating Thickness	Salt Spray Test	Best Application
  Hot-Dip Galv. (HDG)	Molten Zinc	65μm - 85μm	1000+ Hours	Extreme Outdoor Exposure
  ZAM Coating	Alloy Coating	20μm - 30μm	1500+ Hours	High Ammonia / Coastal
  Pre-Galvanized	Coil Coating	20μm	200+ Hours	Dry Inland Storage