SGCC G275 Corrugated Galvanized Roofing Sheet with JIS G3302 Standard for Roof, Wall, and Fence Applications

1. Product Overview

Corrugated galvanized roofing sheet is widely used in industrial buildings, warehouses, workshops, civil structures, and lightweight steel housing where corrosion resistance, low weight, and easy installation are important. The zinc coating helps protect the steel substrate from moisture and atmospheric exposure, while the corrugated profile improves stiffness and drainage performance.

For SGCC-based roofing sheet, G275 coating is commonly selected when a higher level of outdoor corrosion protection is required. Effective width options also make it easier to match different roof layouts and wall panel systems.

2. Technical Solution

Product performance is based on:

• Hot dip galvanized coating for barrier protection and sacrificial protection
• Corrugated profile increasing rigidity compared with flat sheet
• 76 mm wave width and 17–17.5 mm wave height for drainage and profile stability
• SGCC substrate suitable for roofing and wall cladding production
• G275 coating level supporting stronger corrosion resistance in outdoor service

In roofing applications, coating mass directly affects service life, while thickness affects panel stiffness, fastening stability, and handling during installation. Effective width also influences roof coverage efficiency and overlap layout.

3. Specifications

4. Application

• Industrial and civil building roofing
• Warehouse and workshop wall cladding
• Steel structure housing panels
• Ceiling and fence panels
• Mobile house and lightweight enclosure panels
• General construction roof and wall sheet systems

5. Processing

• Hot dip galvanized base sheet preparation
• Corrugation roll forming
• Cut-to-length production
• Roof and wall panel installation
• Overlap fixing on purlins or support members
• On-site trimming according to project layout

6. Advantages

• G275 coating is suitable for stronger outdoor corrosion protection
• Corrugated profile improves stiffness and drainage in roofing use
• Multiple effective widths support different project layouts
• Lightweight sheet reduces transport and site handling load
• Regular or minimized spangle can be selected according to surface preference
• Suitable for both roof and wall applications in industrial and civil buildings

7. How to Choose

• Outdoor roofing with longer service requirement → G275 is commonly selected
• Standard visible galvanized roof finish → regular spangle is often preferred
• Cleaner visual appearance or later finishing → minimized spangle is usually preferred
• Different building layouts → confirm effective width before production
• Longer roof slope or custom installation → confirm cut length based on overlap design

8. FAQ

Q1: Is G275 suitable for corrugated roofing sheets?
Yes, G275 is commonly used for roofing sheets where stronger outdoor corrosion resistance is required.

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

Q3: Is SGCC suitable for roofing and wall cladding?
Yes, SGCC is widely used for galvanized corrugated roofing and wall sheet production.

Q4: Can the sheet length be customized?
Yes, corrugated roofing sheets are commonly produced in project-based lengths within the production range.

Q5: What is the difference between regular spangle and minimized spangle?
Regular spangle gives a standard galvanized appearance, while minimized spangle provides a more uniform surface for applications with higher appearance requirements.