CE Certified GW 125 H20 Rated Grating

GW 125 H20 grating is a steel bar grating designed for heavy‑duty traffic areas where a uniform load of 20 kN per wheel (H20 class) is required. The “GW” designation indicates a welded grid with a 125 mm main bar spacing and a 25 mm cross rod spacing, providing a balanced open area for drainage while maintaining structural rigidity.

The product undergoes CE marking in accordance with EN 124‑1, confirming compliance with European safety, health, and environmental protection requirements for load‑bearing pavement accessories. Certification is based on type testing of load deflection, fatigue resistance, and corrosion protection.

Technical Specifications

Main bar size: 20 mm × 5 mm (height × thickness). Cross rod size: 8 mm × 5 mm. Bars are resistance‑welded at each intersection, producing a monolithic panel with a typical weight of 28 kg/m².

Standard panel dimensions are 1000 mm × 500 mm, but lengths can be adjusted in 125 mm increments to suit module layouts. The open area ratio is approximately 68 %, allowing efficient runoff while preventing ingress of debris larger than 12 mm.

Deflection under H20 load (20 kN per wheel) is limited to 4 mm at mid‑span for a simply supported 600 mm span, verified by three‑point bending tests per EN 124‑3.

Material Options and Surface Treatment

• Base material: hot‑rolled structural steel S235JR (yield strength 235 MPa, tensile strength 360‑510 MPa).
• Alternative grades: S355JR for higher yield strength (355 MPa) or stainless steel 304L for corrosive environments.
• Surface protection: hot‑dip galvanizing (minimum 65 µm Zn) per EN ISO 1461, or powder coating (epoxy‑polyester, 80 µm) for aesthetic or chemical‑resistance requirements.

Typical Applications

Highway and urban bridge decks where pedestrian and vehicular loads coexist, providing slip‑resistant surfaces and efficient water drainage.

Industrial platforms in petrochemical plants, power stations, and mining facilities that require resistance to impact, chemical splash, and heavy equipment loads.

Railway station platforms and loading docks where a durable, low‑maintenance walking surface is needed alongside frequent fork‑lift traffic.

Quality Control Philosophy

Each production lot undergoes dimensional verification of bar spacing and panel squareness using calibrated laser gauges (±0.5 mm tolerance).

Weld integrity is inspected via ultrasonic testing on a random 5 % sample, ensuring absence of cracks or incomplete fusion.

Corrosion coating thickness is measured with a magnetic induction gauge, confirming compliance with the specified galvanizing or powder‑coat weight before shipment.

Customization Parameters

Bar dimensions (height and thickness) can be altered to adjust load capacity; for example, increasing main bar thickness to 6 mm raises the permissible H20 load by approximately 15 %.

Panel length and width are modular; custom lengths up to 6000 mm are feasible with intermediate support brackets designed per project specifications.

Open area ratio can be tuned by changing cross rod spacing (e.g., 20 mm for higher drainage, 30 mm for increased stiffness).

Edge treatments such as welded end plates, bolt‑on flanges, or embedded anchors are available to suit fastening methods.

Specification Table

Frequently Asked Questions

Can dimensions be customized?

Yes. Main bar thickness, panel length, and cross rod spacing are adjustable in 5 mm increments for thickness and 125 mm increments for length, subject to structural validation.

What information is required for a quotation?

Project layout (panel dimensions, layout pattern), load class (H20, H25, etc.), material grade, surface finish, and any required edge treatments or fixing accessories.

How is quality inspected before shipment?

Dimensional checks, weld ultrasonic sampling, and coating thickness measurement are performed on each batch; test certificates are provided with the delivery.

What packaging methods are used for export?

Panels are stacked on wooden pallets, separated by corrugated cardboard layers, and secured with steel strapping. For corrosion‑sensitive grades, VCI film is added before palletizing.

What is the typical production lead time?

Standard galvanized GW 125 H20 grating: 3‑4 weeks after receipt of approved drawings. Custom material grades or special coatings may extend lead time to 6‑8 weeks.

For technical datasheets, sample requests, or project‑specific consultation, please contact our engineering team.