Factory Direct ASTM A36 Corrugated Roofing Sheet for Heavy-Duty Construction

Overview

The Factory Direct ASTM A36 Corrugated Roofing Sheet (S235/S275/S295/S355 Grades) is a robust building material engineered for heavy-duty roofing and cladding in industrial, commercial, and residential projects. Compliant with ASTM A36 and European EN 10025 standards, these sheets feature a corrugated profile that enhances structural strength and water drainage, while the choice of steel grade (S235 to S355) allows customization for varying load requirements.

Manufactured from hot-rolled or cold-rolled steel with optional galvanized/galvalume coatings, the sheets are available in thicknesses from 0.5mm to 3.0mm and wave heights from 25mm to 50mm. The factory-direct model ensures competitive pricing without compromising on quality, making it a preferred choice for large-scale construction projects.

Features

Multi-Grade Structural Performance:

S235: General-purpose grade (yield strength ≥235 MPa), suitable for lightweight roofs and non-load-bearing cladding.

S355: High-strength grade (yield strength ≥355 MPa), ideal for large-span industrial roofs and seismic-resistant structures.

Corrugated Design Advantages:

Increased rigidity: Wave pattern boosts load-bearing capacity by 40% compared to flat sheets, reducing the need for frequent purlins.

Efficient water management: Deep troughs (50mm wave height) ensure rapid rainwater runoff, minimizing ponding and leak risks on roofs with as little as 5° slope.

Coating & Finish Options:

Galvanized (Z180-Z275g): For corrosion resistance in urban and coastal areas, with Z275g offering 20+ years of service life in harsh environments.

Pre-painted (Polyester/PVDF): 200+ color options, including reflective coatings to meet cool roof standards and reduce energy costs.

Installation Efficiency:

Lightweight: 0.5mm S235 sheet weighs 7.85kg/m², 50% lighter than concrete tiles, enabling fast installation with standard roofing tools.

Interlocking design: Compatible with clip-lock or screw-down systems, reducing labor time by 30% compared to traditional roofing materials.

Application

Industrial Facilities: Protects factories, warehouses, and power plants with S355 grade/Z275g coating, enduring heavy machinery vibrations and chemical emissions.

Commercial Buildings: Used in shopping malls, sports complexes, and airports, where large-span capability (up to 6 meters between supports) reduces framework costs.

Residential Construction: Ideal for villa roofs and multi-story apartments, with customizable colors and profiles to match architectural styles (e.g., trapezoidal for modern, corrugated for rustic).

Infrastructure Projects: Forms roofing for bridges, tunnels, and transportation hubs, meeting strict fire codes (Class A non-combustible rating) and load-bearing standards.

FAQ

Q: What’s the difference between S235 and S355 grades?

A: S355 has higher yield strength (355 vs. 235 MPa), making it suitable for heavier loads and longer spans; S235 is more cost-effective for low-stress applications.

Q: Can these sheets be installed on flat roofs?

A: They require a minimum 5° slope for proper drainage; for flat roofs, consider a standing seam profile with additional waterproofing layers.

Q: How do I maintain the roofing sheets in coastal areas?

A: Annual cleaning with fresh water to remove salt deposits; touch up cut edges with zinc-rich paint to prevent rust initiation.

Q: Does the factory offer custom profiles for unique architectural designs?

A: Yes, we provide custom roll-forming for wave height, pitch, and length, with minimum order quantities starting at 100 tons for non-standard profiles.