Plain surface, hot-dip galvanized
The economical standard for dry or generally clean industrial platforms, walkways and flooring.
Engineered Around Your Load & Span
Galvanized Steel Grating
Galvanized steel grating is carbon steel bar grating that is fully fabricated first — welded, cut and banded — then hot-dip galvanized as a complete panel. The applicable ASTM A123/A123M, ISO 1461 or customer requirements and inspection evidence are agreed for the order.
- Hot-dip galvanized after fabrication — welds and cut edges fully coated
- Coating requirements agreed to the applicable project standard
- Coating-thickness records available when specified for the order
- Plain or serrated surface, fabricated to your layout drawings
HDG after fabrication ASTM A123/A123M / ISO 1461 Order-specific inspection scope Export-packed by panel number
What is galvanized steel grating?
Galvanized steel grating is welded carbon steel grating protected by a hot-dip zinc coating. Unlike pre-galvanized material, the panel is completely fabricated first — bearing bars welded, panels cut to size, ends banded and cut-outs formed — and only then immersed in molten zinc. Every weld point, cut edge and drilled hole receives the same continuous coating as the flat surfaces.
This fabrication-first sequence makes hot-dip galvanizing a common choice for outdoor industrial platforms, walkways, stair treads and trench covers. Required coating thickness depends on the material category and measured steel thickness under the project-specified edition of ASTM A123/A123M, ISO 1461 or another agreed standard. Required minimums and actual readings should be stated in the order inspection documents.
DONGFU GRATING manufactures galvanized grating to project drawings in its own steel grating factory: bearing bar size and spacing matched to the span and load, serrated bars where additional traction is requested, and panels banded, numbered and export-packed as agreed.
Before Galvanizing
After Hot-Dip Galvanizing
Gallery
Galvanized Steel Grating in Detail
Specifications
Specification Options
| Item | Options | Notes |
|---|---|---|
| Material | Q235 / Q355 / ASTM A36 / S235JR / S355JR as specified | Not automatically interchangeable; confirm chemistry and mechanical properties by MTC and purchase specification |
| Bearing bar size | 20×3 to 100×10 mm; common 25×3, 30×3, 32×5, 40×5, 50×5 mm | Sized to span and load |
| Bearing bar spacing | 30 / 40 / 60 mm; imperial 19-W-4, 15-W-4 series | 30 mm most common |
| Cross bar spacing | 50 / 100 mm; 2″ / 4″ | Twisted square bar standard |
| Surface type | Plain / serrated | Serrated for wet, oily, snowy or sloped areas |
| Galvanizing standard | ASTM A123/A123M / ISO 1461 / customer specification | State the required edition and evidence in the order |
| Zinc coating thickness | Per the applicable coating category and measured steel thickness in the specified standard | Required minimums and reported readings are confirmed in the order inspection documents |
| Panel size | Up to 6100 × 1000/1200 mm per panel | Larger areas split into numbered panels |
| Fabrication | Banding, cut-outs, toe plates, clips, tread nosing | Detailed from your drawings |
Variants
Recommended Types
Serrated surface, hot-dip galvanized
Serrated bearing bars add slip resistance for outdoor, wet, oily or inclined walking surfaces and stair treads.
Heavy-duty galvanized grating
Larger bearing bars for forklift, truck and equipment loads — always confirmed against span and load before quotation.
Compound galvanized grating
Grating with a checkered plate top where small-object containment or a solid walking surface is required.
Applications
Where Galvanized Steel Grating Is Used
Industrial Platform Grating
Open-grid flooring for chemical plants, equipment platforms and mezzanines — strength, drainage and ventilation in one panel.
View application
Walkway & Catwalk Grating
Safe, drained, ventilated walkways for photovoltaic arrays, pipe racks, tank farms and roof access routes.
View application
Stair Tread Grating
Industrial access stairs with grating treads — drained, slip-resistant and replaceable tread by tread.
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Trench Covers & Drainage
Drainage covers that keep water moving and traffic safe — from pedestrian channels to truck crossings.
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Industrial Flooring
Mezzanine and factory flooring that combines load capacity with light, air and sprinkler penetration.
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Chemical Plant Grating
Material and finish selection for chemical splash, washdown, condensate and combined platform, tank-area and pipe-rack supply.
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Solar PV Walkway Grating
Lightweight maintenance walkways matched to roof load allowance, rail spacing, manual handling and dew or frost exposure.
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Warehouse Platform Grating
Open-grid flooring for multi-level logistics platforms where light, ventilation, sprinkler paths and small-wheel traffic interact.
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Tank Farm Walkway Grating
Curved and removable access panels around tanks, selected from vapour, condensate, H2S and maintenance conditions.
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Pipe Rack Grating
Long, narrow maintenance corridors planned from rack support spacing, access frequency, wet exposure and panel sequence.
View applicationFabrication & QC
Fabrication & Quality Notes
- Panels are completely welded, cut and banded before galvanizing so every edge is coated.
- Cut-outs, toe plates, lifting holes and clip positions are fabricated to layout drawings.
- When included in the order inspection scope, checks can cover bar size and spacing, weld points, flatness and dimensions against the drawing.
- Coating-thickness readings can be recorded in the agreed batch inspection report.
- Tall, thin bearing bars (e.g. 3 mm thick above 50 mm depth) are reviewed for distortion risk before production.
Packaging
Packaging & Delivery
- Panels bundled on steel straps or pallets with edge protection.
- Project panel numbering and packing lists matched to layout drawings.
- Steel frame packing available for irregular or high-value panels.
- Ventilation spacing to reduce wet-storage staining during sea freight.
FAQ
Galvanized Steel Grating FAQs
Do you galvanize before or after fabrication?
Always after. Panels are fully welded, cut, banded and drilled first, then hot-dip galvanized as complete units. This coats welds, cut edges and holes — pre-galvanized material would leave those areas unprotected.
What zinc coating thickness can you achieve?
The applicable value depends on the material category and measured steel thickness under the project-specified edition of ASTM A123/A123M, ISO 1461 or another agreed standard. State the required minimums and reporting scope in the order; actual readings can then be recorded in the agreed inspection report.
Is galvanized grating suitable for chemical plants?
Hot-dip galvanized grating performs well in most industrial atmospheres. For sustained chemical splash, chloride or marine exposure, we recommend evaluating stainless steel 316L. Tell us the environment and we will advise on the practical option.
What is the lead time for galvanized grating?
Typical production lead time is 15–25 days depending on quantity and fabrication complexity, including the galvanizing step. Samples of standard specifications typically take 3–7 days.
Can you supply panels numbered to our layout drawings?
Yes. Our CAD technicians detail each panel to your layout with area and sequence numbering, and panels are tagged and packed to match — this is standard for platform and walkway projects.
Send Your Drawings, Get a Confirmed Specification
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