Full Hard SGCH / G550 Corrugated Galvanized Roofing Sheet with 40–275g/m² Zinc

Product Specification

Full Hard SGCH / G550 Corrugated Galvanized Roofing Sheet with 40–275g/m² Zinc Coating for Industrial Roof and Wall Systems

1. Product Overview

Corrugated galvanized roofing sheet is used in roof and wall systems where corrosion resistance, profile rigidity, and installation efficiency are important. After hot dip galvanizing, the sheet is roll formed into a corrugated profile, which increases stiffness compared with flat sheet and improves water drainage on sloped roofs.

For this product, SGCH full hard or G550 substrate is typically selected when higher profile retention is required after forming. This is common in industrial buildings, warehouses, workshops, logistics centers, terminals, and other steel structure projects.

2. Technical Solution

Product performance is based on:

• Hot dip galvanized coating for barrier protection and sacrificial protection
• Full hard SGCH or G550 substrate for better profile shape retention
• 76 mm wave width and 17–17.5 mm wave height for standard drainage and stiffness
• Effective widths matched to common roof and wall layout modules
• Cut-to-length production for project-based installation requirements

In practical roofing use, thickness affects rigidity and support span performance, zinc coating affects corrosion resistance, and substrate hardness affects deformation resistance during handling, fixing, and service.

3. Specifications

4. Application

• Industrial building roofing
• Warehouse and workshop wall cladding
• Steel structure office and logistics center panels
• Airport terminal and station enclosure systems
• Stadium and large-span building roof sheets
• General roof and wall systems for commercial and industrial 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

• Full hard SGCH or G550 improves profile rigidity after corrugation
• 40–275 g/m² zinc coating range supports different service environments
• Multiple effective widths help match different roof and wall layouts
• 76 mm wave profile provides practical drainage and sheet stiffness
• Cut-length supply helps reduce site cutting and installation time
• Suitable for both roofing and wall cladding in steel structure buildings

7. How to Choose

• Higher wind load or stronger profile retention requirement → SGCH full hard or G550 is commonly preferred
• More exposed outdoor environment → higher zinc coating such as Z180–Z275 is usually selected
• Project with fixed building module → confirm effective width before production
• Longer panel installation → confirm cut length according to roof slope, overlap, and transport conditions
• General wall cladding with lower structural demand → normal hardness may be sufficient depending on design

8. FAQ

Q1: What is the difference between SGCC, SGCH, and G550 for corrugated roofing sheets?
SGCC is commonly used for general galvanized sheet applications, while SGCH full hard and G550 are more suitable where higher hardness and better profile retention are required.

Q2: Why is full hard material used for corrugated roof sheets?
Because higher hardness helps the sheet maintain its corrugated shape after roll forming and improves rigidity during installation and service.

Q3: What does effective width mean?
Effective width is the actual installed cover width after side overlap and profile forming are taken into account.

Q4: Is Z40 enough for outdoor roofing?
That depends on climate, service life target, and exposure condition. For more demanding outdoor environments, higher coating levels are commonly preferred.

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