Standard GI Corrugated Steel Roofing Sheet – General Construction Grade
Product Overview
Galvanized corrugated steel sheet, commonly known as GI corrugated roofing sheet or corrugated iron, is the most widely used light building roofing and cladding material worldwide. Manufactured by cold forming hot-dip galvanized steel coil into continuous trapezoidal corrugations, it combines the corrosion protection of zinc coating with the structural rigidity of the corrugated profile. This standard DX51D Z100 grade is the economical workhorse for general construction, delivering reliable weather protection at the lowest installed cost per square meter.
Why Choose CNB Corrugated Steel Sheets?
CNB manufactures corrugated steel sheets on high-precision automated roll forming lines with strict control over corrugation dimension, straightness and edge alignment. We use only high-quality galvanized base coils from leading mills, ensuring uniform zinc coating and consistent forming performance. With large ready stock of standard profiles and sizes, we support both small retail orders and bulk project shipments with fast delivery and competitive pricing.
Key Specifications
| Item | Specification |
|---|---|
| Product Name | Hot-dip Galvanized Corrugated Steel Roofing Sheet |
| Base Steel Grade | DX51D / SGC340 |
| Corrugation Profile | Standard trapezoidal |
| Base Thickness Range | 0.12mm – 0.8mm |
| Total Sheet Width | 1000mm (standard) |
| Effective Cover Width | 900mm (after side lap) |
| Corrugation Height | 32mm |
| Corrugation Pitch | 76.2mm (3 inch) |
| Standard Lengths | 1830mm, 2440mm, 3050mm, 3660mm, custom cut |
| Zinc Coating Mass | Z60 – Z275g/m² (Z100 standard) |
| Surface Finish | Regular spangle galvanized |
| Applicable Standards | ASTM A653, EN 10346, JIS G3302 |
| Overlap Recommendation | 1.5 waves side lap, 150mm end lap |
Core Advantages
- Proven cost-effectiveness: The lowest installed cost solution for large-area roofing and cladding.
- Good structural rigidity: Corrugated profile provides high strength-to-weight ratio for long span support.
- Fast installation: Standardized profile and overlap design enables quick on-site assembly.
- Reliable corrosion protection: Continuous hot-dip zinc coating for long outdoor service life.
- Flexible customization: Custom lengths, zinc coatings and profiles available for project-specific needs.
Applications
This standard GI corrugated sheet is widely used for residential house roofing, commercial building roofs, warehouse wall cladding, agricultural sheds, temporary construction sites, fencing panels and general light building envelopes.
Get a Quotation
We supply galvanized, galvalume and pre-painted corrugated steel sheets in a full range of profiles, thicknesses and coatings. Custom length cutting, profile tooling and bulk project pricing are available upon request. Contact our roofing materials team for a detailed quotation and free sample evaluation.
