ASTM A653 Galvanized Corrugated Roofing Sheet with 40–275g/m² Zinc Coating for

Product Specification

ASTM A653 Galvanized Corrugated Roofing Sheet with 40–275g/m² Zinc Coating for Roof and Wall Cladding

1. Product Overview

Hot dipped galvanized corrugated roofing sheet is widely used in industrial buildings, warehouses, workshops, and light steel structure projects where corrosion resistance, low self-weight, and fast installation are required. The zinc coating helps protect the steel substrate from atmospheric exposure, while the corrugated profile increases stiffness compared with flat sheet.

For this specification, the thickness range of 0.15–1.5 mm covers light roofing sheets as well as stronger wall and enclosure panels. The available effective widths are suitable for common roof and wall layouts, which helps reduce overlap loss and simplifies site installation.

2. Technical Solution

Product performance is based on:

• Hot dip galvanized coating providing barrier protection and sacrificial protection
• Corrugated profile improving stiffness and drainage performance
• 76 mm wave width and 17–17.5 mm wave height for standard roofing geometry
• SGCH full hard or G550 substrate for better profile retention after forming
• Project-based cut lengths for easier roof and wall installation

In practical roof and wall use, zinc coating mainly affects corrosion resistance, while sheet thickness and substrate hardness affect rigidity, support span behavior, and deformation resistance during handling and fixing.

3. Specifications

4. Application

• Industrial building roofing
• Warehouse and workshop wall cladding
• Large-span steel structure enclosures
• Mobile house and light building panels
• Civil building roof and wall systems
• General exterior and interior enclosure decoration

5. Processing

• Hot dip galvanized base sheet preparation
• Corrugation roll forming
• Cut-to-length production
• Roof and wall overlap installation
• Fastener fixing on purlins or support members
• Site trimming according to layout requirements

6. Advantages

• 40–275 g/m² coating range supports different outdoor service environments
• Corrugated profile improves stiffness without excessive sheet weight
• Multiple effective widths help match different roof coverage layouts
• SGCH or G550 can improve profile retention for corrugated panels
• Project-length production helps reduce site cutting and installation time
• Suitable for both roofing and wall cladding systems

7. How to Choose

• General roof and wall cladding → medium coating is commonly used
• More exposed outdoor environment → higher coating such as Z180–Z275 is usually preferred
• Higher profile rigidity requirement → SGCH full hard or G550 is commonly selected
• Project with fixed module layout → confirm effective width before production
• Longer panel installation → confirm cut length according to roof slope, overlap, and transport limits

8. FAQ

Q1: Is ASTM A653 suitable for corrugated roofing sheet production?
Yes. ASTM A653 is one of the common standards used for galvanized steel sheet that can be further corrugated for roofing and wall applications.

Q2: Why is effective width different from the original sheet width?
Because part of the flat sheet width is consumed by the corrugated profile and side overlap during installation.

Q3: What zinc coating is commonly used for outdoor roofing?
The suitable coating depends on service environment and design life, but higher coating levels are generally selected for stronger outdoor

corrosion resistance.

Q4: Why are SGCH or G550 grades often used for corrugated sheets?
Because higher hardness helps maintain the corrugated profile shape after roll forming and improves panel rigidity during installation and service.

Q5: Can the sheet length be customized for a project?
Yes. Corrugated galvanized roofing sheets are commonly cut to project-based lengths within the available processing range.