Authentic Steel is the export department of Winroad Group and a professional manufacturer and exporter of corrugated galvanized roofing sheets. From our production hub in Tianjin, China, we supply ribbed and trapezoidal roofing panels to roofing contractors, industrial plant developers, trading distributors, and steel structure fabricators in 78+ countries. We provide mill-direct pricing, precision roll-forming, and rapid export dispatch through Tianjin Port. Our trapezoidal GI sheets can be supplied to international standards on request.
According to our company brochure, the standard corrugated galvanized roofing sheet range is:
Thickness: 0.085–1.4 mm
Width: 900–1250 mm
Bundle weight: 2–5 MT
Type: Corrugated Sheets
Base materials: Galvanized / Galvalume / Zn-Al-Mg / PPGI / PPGL
Trapezoidal, rib, box profiles, effective cover width, rib height, and pitch are available on request. Please share your target profile drawing, application, and destination market so we can recommend a suitable specification.
Thickness: 0.085–1.4 mm
Width: 900–1250 mm
Bundle weight: 2–5 MT
Type: Corrugated Sheets
Base materials: Galvanized / Galvalume / Zn-Al-Mg / PPGI / PPGL
Spangle: Big / Regular / Small / Zero Spangle
Zinc coating: 30–600 g/m² for galvanized substrate; specific coating weights available on request
Surface treatment: chromated, oiled, anti-fingerprint, or dry available on request
Steel grades: available on request
Profile: wave, trapezoidal, rib, or custom profile available on request
Effective cover width: available on request
Cut length: available on request
Standards: EN, ASTM, JIS, GB available on request
We support flexible order planning for roofing contractors, industrial builders, importers, and distributors. Specifications can be adjusted according to profile, end use, and destination market requirements.
Trapezoidal and rib profiles can provide good strength-to-weight performance and drainage efficiency. Deeper ribs can improve bending stiffness and span capacity. The corrugated design allows quick installation with standard fasteners. The zinc coating provides barrier and sacrificial protection for outdoor roofing and cladding. Specific load and span data are available on request.
Industrial manufacturing plants: factory roofs, workshops, logistics centers, and storage bays
Commercial buildings: warehouses, shopping center roof decks, hangars, and sports arenas
Agricultural and utility buildings: grain silos, machinery sheds, poultry houses, and fencing panels
Wall cladding and enclosures: exterior wall siding, partitions, and temporary site hoarding
General roofing, cladding, and fencing
Every batch undergoes inspection, including zinc coating thickness measurement, bend tests, tensile strength verification, and surface checks. Salt spray corrosion testing is available on request. A Mill Test Certificate (MTC) can be supplied on request, and third-party inspection is available on request.
To reduce moisture penetration, white rust, and edge deformation during long-distance transit, our roofing panels use multi-layer export packaging: rust-inhibiting VCI paper, waterproof plastic film, metallic corner protectors, and high-tensile steel banding on heat-treated wooden skids. This packaging is suitable for container shipment and safe unloading.
Mill-direct supply and competitive pricing
Stable quality control from raw material to final packing
Export experience to 78+ countries
Custom roll-forming and cutting on request
Fast dispatch from Tianjin Port
Technical support, datasheets, and MTC samples available
Contact our engineering sales team for factory-direct quotations, profile technical drawings, MTC samples, or product sample kits. Please share your required thickness, width, profile, base material, zinc coating, length, and destination port.
AUTHENTIC STEEL
Email: alice@authsteel.com
Mobile / Tel / WhatsApp: +86 137 8227 9845
