JIS SGCC / SGCH / G550 Corrugated Galvanized Roofing Sheet for Building Roof and

Product Specification

JIS SGCC / SGCH / G550 Corrugated Galvanized Roofing Sheet for Building Roof and Wall Cladding

1. Product Overview

Corrugated galvanized roofing sheet is commonly used in industrial buildings, warehouses, workshops, and civil structures where low self-weight, practical corrosion resistance, and convenient installation are required. The galvanized coating helps protect the steel substrate from atmospheric exposure, while the corrugated profile improves stiffness compared with flat sheet.

SGCC is typically used for general roofing and wall applications, while SGCH or G550 is more suitable where higher hardness and better profile retention are required after roll forming.

2. Technical Solution

Product performance is based on:

• Hot dip galvanized coating for basic corrosion protection
• Corrugated profile for improved stiffness and drainage behavior
• SGCC for standard forming applications
• SGCH or G550 for higher hardness and stronger profile stability
• Cut-to-length production matched to project installation needs

For roofing and wall systems, thickness mainly affects rigidity and handling, while steel grade affects profile retention and load performance after forming.

3. Specifications

4. Application

• Industrial building roofing
• Warehouse and workshop wall cladding
• Large-span steel structure enclosures
• Mobile house and light building panels
• Interior and exterior decorative sheet use
• General building material projects

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

• Corrugated profile improves stiffness without heavy sheet weight
• Multiple effective widths help match different roof layouts
• SGCH and G550 options support higher profile rigidity requirements
• Cut-length supply helps reduce site cutting and improve installation efficiency
• Suitable for both roof and wall cladding systems
• Widely used in industrial and civil construction projects

7. How to Choose

• General roof and wall cladding → SGCC is commonly selected
• Higher hardness and shape retention requirement → SGCH or G550 is usually preferred
• Project with fixed module layout → confirm effective width before production
• Longer panel requirement → confirm cut length according to roof slope and overlap design
• Building enclosure use → select thickness according to support spacing and rigidity requirement

8. FAQ

Q1: What is the difference between SGCC, SGCH, and G550 for corrugated sheets?
SGCC is commonly used for general roofing sheets, while SGCH and G550 are selected when higher hardness and better profile retention are required.

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

Q3: Can these sheets be used for both roof and wall applications?
Yes. They are widely used for roofing, wall cladding, and light enclosure systems.

Q4: Can the sheet length be customized by project?
Yes. Corrugated galvanized sheets are commonly produced in project-based lengths within the available processing range.

Q5: How should thickness be selected for roofing sheets?
Thickness is usually chosen according to purlin spacing, rigidity requirement, wind load, and installation method.