SGCH / G550 Corrugated Galvanized Roofing Sheet with 76mm Wave Profile for Industrial Roof and Wall Cladding

1. Product Overview

Corrugated galvanized roofing sheet is mainly used in industrial buildings, warehouses, workshops, and civil structures where lightweight installation, practical corrosion protection, and efficient site fixing are required. The sheet is formed from hot dipped galvanized steel and then corrugated to improve stiffness compared with flat sheet.

For roofing and wall systems, SGCH full hard or G550 grade is commonly selected when the project needs better profile retention after roll forming. In practice, this is important for long roof runs, wall cladding, and light steel structure buildings where sheet shape stability affects installation quality.

2. Technical Solution

Product performance is based on:

• Hot dip galvanized coating for 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 roof and wall use
• Full hard SGCH or G550 substrate for profile stability after forming
• Regular or minimized spangle according to appearance requirement

In roofing applications, thickness affects rigidity and handling, zinc coating affects corrosion resistance, and substrate hardness affects profile retention. These three factors should be matched together rather than selected separately.

3. Specifications

4. Application

• Industrial roofing sheets
• Warehouse and workshop wall cladding
• Steel structure building panels
• Ceiling and fence panels
• Mobile house and light enclosure systems
• General industrial and civil construction sheet projects

5. Processing

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

6. Advantages

• Full hard SGCH or G550 helps maintain corrugated profile shape
• 40–275 g/m² coating range supports different outdoor service conditions
• Multiple effective widths help match different roof layouts
• Corrugated profile improves stiffness without heavy sheet weight
• Regular or minimized spangle can be selected by visible finish requirement
• Suitable for both roof and wall cladding systems

7. How to Choose

• Long roof span or higher profile rigidity requirement → SGCH or G550 is commonly selected
• General industrial roofing → medium to higher coating such as Z120–Z275 is often preferred
• Visible galvanized wall panels → minimized spangle may give a cleaner appearance
• Project with fixed roof module → confirm effective width before production
• Custom installation length → confirm cut length according to overlap and roof slope design

8. FAQ

Q1: Why are SGCH and G550 commonly used for corrugated roofing sheets?
Because full hard grades help the sheet keep its corrugated shape after roll forming and improve profile stiffness in service.

Q2: What is the difference between effective width and actual sheet width?
Effective width is the installed cover width after side overlap, while actual sheet width is larger before installation.

Q3: Is G550 always necessary for corrugated roofing sheets?
Not always. It depends on span, wind load, support spacing, and the profile rigidity required by the project.

Q4: What zinc coating is commonly used for outdoor roof applications?
For general outdoor roofing, medium to higher coating levels such as Z120–Z275 are commonly selected depending on service environment.

Q5: Can the sheet be produced in customized length?
Yes, corrugated galvanized roofing sheets are commonly cut to project-based lengths within the production range.