G550 Corrugated Galvanized Roofing Sheet with 40–275g/m² Zinc Coating and 1050mm

Product Specification

G550 Corrugated Galvanized Roofing Sheet with 40–275g/m² Zinc Coating and 1050mm Effective Width for Roof and Wall Systems

1.Product Overview

Corrugated galvanized roofing sheet is widely used in industrial buildings, warehouses, workshops, and light steel structures where low self-weight, practical corrosion resistance, and fast installation are required. After hot dip galvanizing, the steel sheet is corrugated to improve stiffness and drainage performance, making it suitable for roof and wall cladding systems.

For this specification, G550 high-strength substrate is commonly selected when better profile retention is needed after roll forming. A zinc coating range of 40–275 g/m² allows the sheet to be matched to different service environments, from general covered applications to more exposed roofing use.

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
• G550 full hard substrate for profile stability and structural stiffness
• 76 mm wave width and 17–17.5 mm wave height for drainage and overlap performance
• Multiple effective widths for different roof and wall layout requirements

In roofing applications, thickness affects sheet stiffness and wind resistance, while zinc coating affects corrosion resistance and service life. For long roof runs and exposed wall cladding, higher substrate strength helps reduce profile distortion during transport and installation.

3.Specifications

4.Application

• Industrial roofing sheets
• Warehouse and workshop wall cladding
• Ceiling and fence panels
• Mobile house and light enclosure systems
• Sandwich panel facing sheets
• General industrial and civil building roof and wall 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

• G550 high-strength substrate helps maintain corrugated profile shape
• 40–275 g/m² zinc coating range supports different corrosion environments
• Corrugated section improves stiffness without heavy sheet weight
• Multiple effective widths help optimize roof coverage and installation efficiency
• Suitable for both roof and wall applications
• Seaworthy packing supports export delivery and site handling

7.How to Choose

• Long-span or higher rigidity roof system → G550 is commonly preferred
• General outdoor roofing → medium to higher coating such as Z120–Z275 is usually selected
• Project with fixed module width → confirm effective width before production
• Longer panel installation → confirm cut length based on roof slope and overlap design
• Roof and sandwich panel facing use → check thickness against purlin spacing and design load

8.FAQ

Q1: Why is G550 commonly used for corrugated roofing sheets?
Because higher hardness and strength help the sheet keep its corrugated shape after roll forming and improve rigidity 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 the original sheet width is larger before forming and installation.

Q3: Is 40 g/m² zinc coating enough for outdoor roofing?
It depends on the environment and service life target. For more demanding outdoor conditions, higher coating levels are commonly selected.

Q4: Can the sheet be used for both roof and wall cladding?
Yes. This profile is commonly used for roofing, wall panels, ceilings, fences, and sandwich panel facing sheets.

Q5: What should be checked before ordering project lengths?
Roof slope, overlap length, purlin spacing, transport limitations, and site installation method should all be confirmed before finalizing sheet length.