China Customized Expanded Metal Grating Manufacturers Suppliers Factory - Wholesale Service

Decorative Expanded Metal Manufacturer for Architectural Facades, Interior Design & Custom Metal Screens

Structural load-bearing expanded metal grating produced by cold-forming thick carbon steel, stainless steel, or aluminum plate in a single slitting and stretching pass. Features an elevated 3D diamond pattern with integral anti-slip edges, high strength-to-weight ratios, and self-draining open area for industrial platforms and catwalks.

Carbon Steel Expanded Metal Grating
Materials：Carbon Steel
Specification：Our capability covers LWD ranging from 0.75 mm up to 400 mm, and SWD ranging from 2 mm to 150 mm. Sheet thickness ranges from 0.3 mm to 15 mm, with a...
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Galvanized Steel Expanded Metal Grating
Materials：Galvanized Steel
Specification：Our capability covers LWD ranging from 0.75 mm up to 400 mm, and SWD ranging from 2 mm to 150 mm. Sheet thickness ranges from 0.3 mm to 15 mm, with a...
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Stainless Steel Expanded Metal Grating
Materials：Stainless Steel
Specification：Our capability covers LWD ranging from 0.75 mm up to 400 mm, and SWD ranging from 2 mm to 150 mm. Sheet thickness ranges from 0.3 mm to 15 mm, with a...
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Aluminum Expanded Metal Grating
Materials：Aluminum
Specification：Our capability covers LWD ranging from 0.75 mm up to 400 mm, and SWD ranging from 2 mm to 150 mm. Sheet thickness ranges from 0.3 mm to 15 mm, with a maximum...
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Product Types

Industrial Walkway and Platform Grating
Structure: Heavy gauge raised diamond pattern with strand thicknesses up to 8.0 mm (0.315 inches).
Key Features: Multi-directional traction, high point-load distribution, and open area that prevents accumulation of snow, ice, oil, and mud.

Structural Stair Treads and Trench Covers
Structure: Cut-to-size grating panels fitted with welded side mounting plates, checker plate nosing, or perimeter flat-bar edge banding.
Key Features: Rigid edge support, ready-to-bolt installation on structural steel stringers, and high slip resistance on leading tread edges.

Technical Specifications

Parameter	Metric Range	Imperial Range	Manufacturing Tolerance
Plate Thickness (Base)	3.0 mm to 8.0 mm	0.118 inches to 0.315 inches	+/- 0.15 mm (+/- 0.006 inches)
Strand Width	3.0 mm to 12.0 mm	0.118 inches to 0.472 inches	+/- 0.20 mm (+/- 0.008 inches)
SWD (Short Way of Diamond)	20.0 mm to 50.0 mm	0.787 inches to 1.968 inches	Pitch accuracy +/- 0.8 mm
LWD (Long Way of Diamond)	50.0 mm to 150.0 mm	1.968 inches to 5.905 inches	Pitch accuracy +/- 1.2 mm
Weight per Square Meter	12.0 kg to 32.0 kg/m2	2.45 lbs to 6.55 lbs/sq ft	Nominally controlled per alloy
Standard Panel Sizes	1220 x 2440 mm, 1220 x 3050 mm	4 x 8 feet, 4 x 10 feet	Squareness +/- 3.0 mm
Supply Formats	Standard Mill Panels, Custom Cut-to-Size Grating, Banded Stair Treads with Nosing

Material Options

Structural Carbon Steel (Q235, Q355, ASTM A36, S235JR): High tensile strength material for heavy industrial walkways and platform framing.

Stainless Steel (304, 304L, 316, 316L): High corrosion resistance for offshore oil rigs, food processing plants, and chemical storage facilities.

Aluminum Alloy (5052-H32, 6061-T6): Lightweight, spark-resistant material for marine structures, transit vehicles, and water treatment plants.

Surface Treatments and Edge Finishing

Hot-Dip Galvanizing (ASTM A123 / EN ISO 1461)

Post-fabrication bath immersion applying 70 to 85 microns of zinc to seal all sheared strand edges and cut ends.

Perimeter Flat-Bar Banding

MIG-welded steel closure bars along panel edges to increase side load transfer and eliminate open strand points.

Anti-Slip Nosing Strips

Welded abrasive or diamond-plate leading edges on stair treads for elevated foot traction.

Bituminous or Epoxy Coating

Specialized black pitch or chemical-resistant paint coatings for underground utility or acid-exposure applications.

Primary Applications

Industrial Platforms and Catwalks

Flooring for oil refineries, power generating stations, cement kilns, and wastewater treatment platforms.

Stair Towers and Emergency Escapes

Outdoor industrial stair treads meeting structural anti-slip traction standards.

Drainage Trench Covers and Vault Tops

Load-bearing covers for stormwater channels, utility vaults, and washdown pits.

Conveyor Walkways and Maintenance Aisles

Side catwalks along bulk material handling systems in mining and port facilities.

Machine Access Ramps and Overhead Bridges

Elevated maintenance walkways for automated assembly lines and overhead crane runways.

Manufacturing Capabilities and Quality Control

Fabrication takes place on 100 to 250-ton heavy-duty press expansion lines equipped with automatic plate feeding and precision hydraulic shearing machinery.

01/

Structural Edge Banding and Welding: AWS D1.1 / EN ISO 9606 certified welders apply perimeter closure bars and end carrier plates for bolt-on stair treads.

02/

Flatness and Camber Correction: Post-expansion hydraulic multi-roller levelers equalize internal plate stresses to maintain panel flatness within 3.0 mm across 10-foot lengths.

03/

Load and Deflection Testing: Mechanical proof-load sampling verifies uniform and concentrated point-load limits per ISO 14122 and OSHA industrial platform requirements.

04/

Material Traceability: Shipped with EN 10204 3.1 Mill Test Certificates covering steel heat numbers, chemical composition, yield and tensile testing, and zinc coating thickness reports.

Packaging

According to the chemical and physical properties of the products, we use waterproof, moisture-proof and breakage-proof materials for packaging to avoid product damage during transportation. In addition, we can also provide customized packaging according to customer's specific requirements to meet the special needs of different customers.

FAQ

Q: How does expanded metal grating compare to welded bar grating in weight and strength?

A: Expanded metal grating is cold-formed from a single solid steel plate without joint welds or cold solder points. It provides higher slip resistance in multiple directions and a lighter weight per square foot for equivalent open area, eliminating weld joint cracking under vibration.

Q: What span distance is recommended for standard expanded metal catwalk grating?

A: Recommended support bar spans range between 600 mm and 1000 mm (24 inches to 36 inches), depending on the plate thickness, strand width, and targeted uniform live load (such as 2.5 kN/sq m to 5.0 kN/sq m). Detailed load-deflection tables are available for engineering calculations.

Q: Why is post-fabrication hot-dip galvanizing recommended over pre-galvanized sheet?

A: Expanding cut metal slitting edges exposes raw steel. Hot-dip galvanizing the finished cut and welded grating assembly ensures that all inner diamond strand edges, corners, and band welds receive complete 70+ micron zinc coverage against corrosion.

Q: Can expanded metal grating be supplied with custom perimeter banding and mounting holes?

A: Yes. We supply fully fabricated panels sheared to custom dimensions with perimeter flat bars welded along SWD and LWD edges, as well as stair treads pre-drilled with end carrier plates for direct bolting to stair stringers.

Q: What parameters are needed to calculate a structural quotation for grating?

A: Specify the base plate thickness, strand width, SWD x LWD dimensions (or standard item code), panel dimensions (width x length with diamond orientation), boundary banding requirements, surface finish (black or hot-dip galvanized), and target load parameters.

Q: Are mill test reports and galvanizing inspection certificates provided with international orders?

A: Yes. Every shipment includes EN 10204 3.1 Mill Test Certificates verifying raw plate chemical and mechanical properties, along with zinc coating thickness verification reports measured via magnetic thickness gauges.

Anping Yilida Metal Wire Mesh Co., Ltd. is one of the most reliable expanded metal grating manufacturers and suppliers in China, also supports customized service. Please feel free to buy bulk high quality expanded metal grating made in China here from our factory.

Stainless Steel Expanded Metal Grating, Galvanized Steel Expanded Metal Grating, Aluminum Expanded Metal Grating