JIS G3302 SGCC G275 Corrugated Galvanized Roofing Sheet with 76mm Wave for Roof

Product Specification

JIS G3302 SGCC G275 Corrugated Galvanized Roofing Sheet with 76mm Wave for Roof and Wall Applications

1. Product Overview

Corrugated galvanized roofing sheet is widely used in industrial buildings, warehouses, workshops, lightweight steel structures, and civil construction where corrosion resistance, low self-weight, and convenient installation are required. The hot dipped zinc coating helps protect the steel substrate against atmospheric corrosion, while the corrugated profile improves panel stiffness and drainage performance.

This type of sheet is commonly selected for roof and wall systems that require fast installation and practical service life under outdoor exposure. Effective width options also make it easier to match different roofing layouts and project requirements.

2. Technical Solution

Product performance is based on:

• Hot dip galvanized coating for corrosion protection
• Corrugated profile increasing stiffness compared with flat sheet
• Wave geometry supporting rainwater drainage
• Full hard or commercial grade substrate for profile forming
• G275 level coating commonly used where stronger outdoor protection is required

For roofing and wall use, zinc coating level directly affects service life, while sheet thickness affects rigidity, wind resistance, and installation stability. Wave height and wave width also influence structural support between purlins and overall panel appearance.

3. Specifications

4. Application

• Industrial and civil building roofing
• Warehouse and workshop wall cladding
• Steel structure housing panels
• Ceiling and fence panels
• Container-related sheet applications
• Sandwich panel facing sheets

5. Processing

• Cut-to-length production
• Corrugation roll forming
• Roof and wall panel installation
• Fastener fixing on purlin systems
• Overlap connection for waterproofing
• Optional site trimming according to project layout

6. Advantages

• Corrugated profile improves stiffness and installation practicality
• G275 coating can support better outdoor corrosion resistance
• Multiple effective widths help match different roof designs
• Lightweight sheet reduces handling and transport load
• Hot dipped galvanized surface is suitable for general roof and wall use
• Suitable for both industrial and civil construction projects

7. How to Choose

• Roof sheet for stronger outdoor exposure → higher coating such as G275 is commonly selected
• Longer span or higher wind load area → thicker sheet is usually preferred
• Visible roof and wall panels → choose suitable spangle according to appearance requirement
• Project with fixed roof layout → confirm effective width before order
• Site installation with customized panel length → confirm cut length based on roof slope and overlap design

8. FAQ

Q1: What zinc coating is commonly used for corrugated roofing sheets?
For general roofing use, medium to higher coating levels such as Z120 to Z275 are commonly selected depending on service environment.

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

Q3: Is SGCH full hard suitable for roofing sheets?
Yes, full hard material is commonly used for corrugated roofing sheets because it helps maintain profile shape and panel stiffness.

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

Q5: What is the role of the 76mm wave width and 17–17.5mm wave height?
These profile dimensions help improve drainage, stiffness, and installation performance in roof and wall systems.