Steel grating is an open-grid assembly of parallel load-bearing bars and cross bars, rigidly joined at intersections through welding or mechanical locking. Its open-grid design provides an exceptional strength-to-weight ratio while allowing light, air, and liquids to pass through — making it the preferred flooring solution for industrial platforms, walkways, stair treads, trench covers, and equipment access areas. Our steel grating is manufactured in compliance with YB/T 4001.1-2019, the current Chinese black metallurgy industry standard for steel grating, which became effective on January 1, 2020. We also manufacture to ANSI/NAAMM, BS4592, and ASTM standards upon customer request.
Types of Steel Grating
|
Types |
Definition |
Advantages |
Application |
|
Welded Steel Grating |
Welded steel grating is manufactured by automatically welding bearing bars and cross bars at every intersection. |
High structural stability Strong welding joints Excellent load capacity Suitable for heavy industrial applications |
Industrial platforms Factory floors Power plants Petrochemical facilities |
|
Press-Locked Steel Grating |
Press-locked steel grating is produced by pressing cross bars into pre-punched bearing bars under high pressure. |
Smooth and uniform appearance Strong connection between bars |
Architectural and decorative applications |
|
Serrated Steel Grating |
Serrated bearing bars provide enhanced slip resistance. |
Unmatched Slip Resistance High Strength and Load-Bearing Capacity Excellent Drainage and Self-Cleaning Properties Low Maintenance and Cost-Effectiveness |
Wet environments Oil-contaminated areas Offshore platforms Outdoor walkways |
Material Grades
|
Material |
Standard Equivalent |
Best For |
|
Q235 / ASTM A36 |
China GB / U.S. ASTM |
General industrial applications, cost-effective |
|
Stainless Steel 304 |
ASTM A240 |
General corrosion resistance, food processing |
|
Stainless Steel 316 / 316L |
ASTM A240 |
Marine, chemical, chloride environments |
|
Aluminum |
— |
Lightweight, non-sparking applications |
|
VerticalBar Spacing |
Horizontal Bar Spacing |
Specification of Supporting Flat Steel (Width X Thickness) |
|||||
|
20 × 3 |
25 × 3 |
32 × 3 |
40 × 3 |
20 × 5 |
25 × 5 |
||
|
30 |
100 |
G203 / 30 / 100 |
G253 / 30 / 100 |
G323 / 30 / 100 |
G403 / 30 / 100 |
G205 / 30 / 100 |
G255 / 30 / 100 |
|
|
50 |
G203 / 30 / 50 |
G253 / 30 / 50 |
G323 / 30 / 50 |
G403 / 30 / 50 |
G205 / 30 / 50 |
G255 / 30 / 50 |
|
40 |
100 |
G203 / 40 / 100 |
G253 / 40 / 100 |
G323 / 40 / 100 |
G403 / 40 / 100 |
G205 / 40 / 100 |
G255 / 40 / 100 |
|
|
50 |
G203 / 40 / 50 |
G253 / 40 / 50 |
G323 / 40 / 50 |
G403 / 40 / 50 |
G205 / 40 / 50 |
G255 / 40 / 50 |
|
60 |
50 |
- |
G253 / 60 / 50 |
G253 / 60 / 50 |
G403 / 60 / 50 |
G205 / 60 / 50 |
G255 / 60 / 50 |
|
VerticalBar Spacing |
Horizontal Bar Spacing |
Specification of Supporting Flat Steel (Width X Thickness) |
|||||
|
|
40 × 5 |
45 × 5 |
50 × 5 |
55 × 5 |
60 × 5 |
||
|
30 |
100 |
G325 / 30 / 100 |
G405 / 30 / 100 |
G455 / 30 / 100 |
G505 / 30 / 100 |
G555 / 30 / 100 |
G605 / 30 / 100 |
|
|
50 |
G325 / 30 / 50 |
G405 / 30 / 50 |
G455 / 30 / 50 |
G505 / 30 / 50 |
G555 / 30 / 50 |
G605 / 30 / 50 |
|
40 |
100 |
G325 / 40 / 100 |
G405 / 40 / 100 |
G455 / 40 / 100 |
G505 / 40 / 100 |
G555 / 40 / 100 |
G605 / 40 / 100 |
|
|
50 |
G325 / 40 / 50 |
G405 / 40 / 50 |
G455 / 40 / 50 |
G505 / 40 / 50 |
G555 / 40 / 50 |
G605 / 40 / 50 |
|
60 |
50 |
G325 / 60 / 50 |
G405 / 60 / 50 |
G455 / 60 / 50 |
G505 / 60 / 50 |
G555 / 60 / 50 |
G605 / 60 / 50 |
Bearing Bar Specifications
Bearing bars are the primary load-carrying members running parallel to the panel length.
Common bearing bar sizes (width × thickness): 20×3, 20×5, 25×3, 25×5, 30×3, 30×5, 32×5, 40×5, 50×5, 65×5, 75×6, 100×10mm
Bearing bar height range: 20mm to 100mm
Bearing bar thickness range: 2mm to 10mm
Bearing bar spacing: 15mm, 20mm, 25mm, 30mm, 34mm, 38mm, 40mm, 50mm, 60mm. Series 1 (30mm) is the most common.
Cross Bar Specifications
Cross bars run perpendicular to bearing bars, providing stability and grid structure.
Common cross bar sizes: 5×5mm, 6×6mm, 8×8mm
Cross bar spacing: 50mm or 100mm center-to-center
Standard Panel Sizes
|
Dimension |
Standard Size |
Customization |
|
Width |
995mm |
Available |
|
Length |
6000mm |
Available |
Depending on the operating environment, steel grating can be manufactured using different materials:
|
Material |
Features |
Typical Applications |
|
Q235 / ASTM A36 Carbon Steel |
High strength, economical, easy fabrication |
General industrial platforms |
|
Galvanized Carbon Steel |
Improved corrosion resistance |
Outdoor walkways, factories |
|
Stainless Steel 304 |
Good corrosion resistance and hygiene performance |
Food processing, pharmaceutical facilities |
|
Stainless Steel 316 / 316L |
Superior resistance to chloride and chemical corrosion |
Marine, offshore, chemical plants |
|
Aluminum |
Lightweight and non-sparking |
Special industrial applications |
Material Selection Guide
|
Environment |
Recommended Material |
|
Dry indoor, general industrial |
Carbon steel + galvanized |
|
Outdoor, moderate exposure |
Carbon steel + hot-dip galvanized |
|
Coastal / marine |
Stainless steel 316 / 316L |
|
Chemical / acidic exposure |
Stainless steel 316L |
|
Food processing / pharmaceutical |
Stainless steel 304 / 316L |
|
Lightweight / non-sparking |
Aluminum |
Press-Locked Steel Grating: Cross bars are mechanically pressed into bearing bars under high pressure, creating a flush, seamless appearance.
Standard Workflow: Raw material inspection → Bearing bar and cross bar preparation → Assembly → Welding or press-locking → Edge finishing (end banding) → Cutting and shaping → Surface treatment → Final inspection → Packaging
Surface Finishing Options
Hot-Dip Galvanizing (Most Common)
Standards: GB/T 13912, ASTM A123
Process: Steel grating is immersed in molten zinc at approximately 460°C
Coating thickness: Typical coating thickness complies with ASTM A123 requirements and varies according to steel thickness.
Painting / Powder Coating
Available in various colors
Suitable for indoor applications or aesthetic requirements
Stainless Steel (Mill Finish)
No coating required
Inherent corrosion resistance from chromium oxide passive layer
|
VerticalBar Spacing |
Horizontal Bar Spacing |
Specification of Supporting Flat Steel (Width X Thickness) |
|||||
|
20 × 3 |
25 × 3 |
32 × 3 |
40 × 3 |
20 × 5 |
25 × 5 |
||
|
30 |
100 |
G203 / 30 / 100 |
G253 / 30 / 100 |
G323 / 30 / 100 |
G403 / 30 / 100 |
G205 / 30 / 100 |
G255 / 30 / 100 |
|
|
50 |
G203 / 30 / 50 |
G253 / 30 / 50 |
G323 / 30 / 50 |
G403 / 30 / 50 |
G205 / 30 / 50 |
G255 / 30 / 50 |
|
40 |
100 |
G203 / 40 / 100 |
G253 / 40 / 100 |
G323 / 40 / 100 |
G403 / 40 / 100 |
G205 / 40 / 100 |
G255 / 40 / 100 |
|
|
50 |
G203 / 40 / 50 |
G253 / 40 / 50 |
G323 / 40 / 50 |
G403 / 40 / 50 |
G205 / 40 / 50 |
G255 / 40 / 50 |
|
60 |
50 |
- |
G253 / 60 / 50 |
G253 / 60 / 50 |
G403 / 60 / 50 |
G205 / 60 / 50 |
G255 / 60 / 50 |
|
VerticalBar Spacing |
Horizontal Bar Spacing |
Specification of Supporting Flat Steel (Width X Thickness) |
|||||
|
|
40 × 5 |
45 × 5 |
50 × 5 |
55 × 5 |
60 × 5 |
||
|
30 |
100 |
G325 / 30 / 100 |
G405 / 30 / 100 |
G455 / 30 / 100 |
G505 / 30 / 100 |
G555 / 30 / 100 |
G605 / 30 / 100 |
|
|
50 |
G325 / 30 / 50 |
G405 / 30 / 50 |
G455 / 30 / 50 |
G505 / 30 / 50 |
G555 / 30 / 50 |
G605 / 30 / 50 |
|
40 |
100 |
G325 / 40 / 100 |
G405 / 40 / 100 |
G455 / 40 / 100 |
G505 / 40 / 100 |
G555 / 40 / 100 |
G605 / 40 / 100 |
|
|
50 |
G325 / 40 / 50 |
G405 / 40 / 50 |
G455 / 40 / 50 |
G505 / 40 / 50 |
G555 / 40 / 50 |
G605 / 40 / 50 |
|
60 |
50 |
G325 / 60 / 50 |
G405 / 60 / 50 |
G455 / 60 / 50 |
G505 / 60 / 50 |
G555 / 60 / 50 |
G605 / 60 / 50 |
Bearing Bar Specifications
Bearing bars are the primary load-carrying members running parallel to the panel length.
Common bearing bar sizes (width × thickness): 20×3, 20×5, 25×3, 25×5, 30×3, 30×5, 32×5, 40×5, 50×5, 65×5, 75×6, 100×10mm
Bearing bar height range: 20mm to 100mm
Bearing bar thickness range: 2mm to 10mm
Bearing bar spacing: 15mm, 20mm, 25mm, 30mm, 34mm, 38mm, 40mm, 50mm, 60mm. Series 1 (30mm) is the most common.
Cross Bar Specifications
Cross bars run perpendicular to bearing bars, providing stability and grid structure.
Common cross bar sizes: 5×5mm, 6×6mm, 8×8mm
Cross bar spacing: 50mm or 100mm center-to-center
Standard Panel Sizes
|
Dimension |
Standard Size |
Customization |
|
Width |
995mm |
Available |
|
Length |
6000mm |
Available |
Depending on the operating environment, steel grating can be manufactured using different materials:
|
Material |
Features |
Typical Applications |
|
Q235 / ASTM A36 Carbon Steel |
High strength, economical, easy fabrication |
General industrial platforms |
|
Galvanized Carbon Steel |
Improved corrosion resistance |
Outdoor walkways, factories |
|
Stainless Steel 304 |
Good corrosion resistance and hygiene performance |
Food processing, pharmaceutical facilities |
|
Stainless Steel 316 / 316L |
Superior resistance to chloride and chemical corrosion |
Marine, offshore, chemical plants |
|
Aluminum |
Lightweight and non-sparking |
Special industrial applications |
Material Selection Guide
|
Environment |
Recommended Material |
|
Dry indoor, general industrial |
Carbon steel + galvanized |
|
Outdoor, moderate exposure |
Carbon steel + hot-dip galvanized |
|
Coastal / marine |
Stainless steel 316 / 316L |
|
Chemical / acidic exposure |
Stainless steel 316L |
|
Food processing / pharmaceutical |
Stainless steel 304 / 316L |
|
Lightweight / non-sparking |
Aluminum |
Press-Locked Steel Grating: Cross bars are mechanically pressed into bearing bars under high pressure, creating a flush, seamless appearance.
Standard Workflow: Raw material inspection → Bearing bar and cross bar preparation → Assembly → Welding or press-locking → Edge finishing (end banding) → Cutting and shaping → Surface treatment → Final inspection → Packaging
Surface Finishing Options
Hot-Dip Galvanizing (Most Common)
Standards: GB/T 13912, ASTM A123
Process: Steel grating is immersed in molten zinc at approximately 460°C
Coating thickness: Typical coating thickness complies with ASTM A123 requirements and varies according to steel thickness.
Painting / Powder Coating
Available in various colors
Suitable for indoor applications or aesthetic requirements
Stainless Steel (Mill Finish)
No coating required
Inherent corrosion resistance from chromium oxide passive layer
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