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Welded Steel Grating

Welded steel grating joins cross bars to load-bearing flat bars to form a rigid one-piece panel for platforms, walkways and trench covers. Automated press-welding lines produce repeatable standard grids at volume, while manual fabrication covers irregular geometry, non-standard arrangements and project-specific details identified on approved drawings.

Machine press-welding for high-volume standard panels
Manual fabrication for irregular geometry and non-standard details
Carbon steel or stainless steel, plain or serrated surface
Fabricated, banded and numbered to your layout drawings

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Welding work on a custom welded steel grating panel

Most economical structure Two production routes Fabricated to drawings Plain or serrated surface

What is welded steel grating?

Welded steel grating joins cross bars to load-bearing flat bars at their intersections to form a rigid, one-piece panel. The bearing bars carry load in their span direction, while the welded intersections maintain the grid and panel integrity. Openings, edge banding and overall dimensions are produced to the approved drawing.

Production method is assigned after drawing review. Bar section, grid pattern, panel geometry, quantity, fabrication details and inspection requirements determine whether panels run on an automated press-welding line, are completed by manual fabrication, or use both routes within one project.

Because welding suits both carbon steel and stainless steel and accepts banding, cut-outs, toe plates and secondary fabrication, welded grating is the default choice for industrial platforms, walkways, stair treads and trench covers worldwide.

Worker manually welding the perimeter of a steel grating panel

Close-up of welded steel grating bearing bars and cross-bar joints

Close-up of welded intersections on a custom steel grating panel

Production Routes

Machine Press-Welded vs Manually Welded Grating

Automated press welding forms repeatable standard grids at high production volume. Manual welding and fabrication are used for heavy sections, non-standard bar arrangements, irregular geometry, banding, toe plates and reinforcement around cut-outs. The route is selected according to the approved drawing, bar section, quantity and inspection requirements — not by a simple strong-versus-weak comparison.

Automated press welding forms standard grids at repeatable spacing for volume production.

Volume production

Automated press welding

Cross bars are resistance-welded into bearing bars under controlled pressure to form a rigid, repeatable standard grid.

Best suited to: Standard mesh patterns, repeated panels and high-volume platform or walkway orders.
Buyer benefit: High throughput, repeatable spacing and economical production for confirmed standard specifications.

Manual welding adds the flexibility needed for irregular geometry and project-specific details.

Drawing-led fabrication

Manual welding and fabrication

Skilled welders fit and weld non-standard arrangements and complete project-specific fabrication from approved drawings.

Best suited to: Irregular, fan-shaped or circular panels, heavy sections, non-standard arrangements and detailed cut-outs.
Buyer benefit: Greater flexibility for one-off project panels, banding, toe plates and reinforcement around openings.

Gallery

Welded Steel Grating in Detail

Close-up of stacked hot-dip galvanized welded steel grating panels

Overlapping welded steel grating panels showing bearing bars and cross bars

Stacked welded steel grating panels showing regular rectangular openings

Close-up of stacked welded steel grating panels viewed along the bearing bars

Galvanized welded steel grating panels arranged in the workshop

Close-up of welded steel grating panels with twisted cross bars

Serrated welded steel grating bearing bars with a toothed walking surface

Specifications

Specification Options

Welded steel grating — specification options
Item	Options	Notes
Material	Q235 / Q355 / ASTM A36 / S235JR / S355JR as specified; SS304 / SS316L	Grades are not automatically interchangeable; MTC must match the purchase specification
Bearing bar size	20 × 3 mm 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-space (19-W-4), 15-space series	30 mm most common for platforms
Cross bar	Twisted square bar at 50 / 100 mm (2″ / 4″)	100 mm most economical; 50 mm limits falling objects
Surface type	Plain / serrated	Serrated for wet, oily, snowy or sloped areas
Finish	Hot-dip galvanized, painted or mill finish	Galvanized after fabrication per ASTM A123 / ISO 1461 or customer standard
Max panel size	Up to 6100 × 1000/1200 mm; 70–100 kg per panel handling limit	Larger areas supplied as split, numbered panels
Fabrication	Banding, cut-outs, toe plates, lifting holes, clips	Detailed from your layout drawings

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Variants

Recommended Types

Serrated welded grating

Toothed bearing bars add slip resistance for wet, oily, snowy or inclined walking surfaces and stair treads.

Heavy-duty welded grating

Deeper, thicker bearing bars for forklift and vehicle loads — always confirmed against span, wheel load and support conditions before quotation.

Applications

Where Welded Steel Grating Is Used

Industrial Platform Grating

Open-grid flooring for chemical plants, equipment platforms and mezzanines — strength, drainage and ventilation in one panel.

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Walkway & Catwalk Grating

Safe, drained, ventilated walkways for photovoltaic arrays, pipe racks, tank farms and roof access routes.

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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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Fabrication & QC

Fabrication & Quality Notes

Bearing bars and cross bars are checked against mill test certificates before cutting.
Standard panels are generally press-welded on automated lines; irregular layouts and sections outside the selected line setup are completed through qualified manual fabrication.
Cut-outs, banding, toe plates, lifting holes and clip positions follow the layout drawings.
Each panel is inspected for bar size and spacing, weld points, flatness and overall dimensions against the drawing.
Tall, thin bearing bars (for example 3 mm thick above 50 mm depth) are reviewed for galvanizing distortion risk before production.

Packaging

Packaging & Delivery

Panels bundled with steel straps or stacked on pallets with edge protection.
Project panel numbering and packing lists matched to layout drawings for site sequence.
Steel frame crates available for irregular, stainless or high-value panels.
Ventilation spacing on galvanized bundles to reduce wet-storage staining during sea freight.

FAQ

Welded Steel Grating FAQs

What is the difference between machine-welded and manually welded grating?

Machine press welding forms repeatable standard grids efficiently for volume orders. Manual welding and fabrication provide flexibility for irregular geometry, non-standard bar arrangements, banding, toe plates and reinforcement around cut-outs. The production route does not determine load capacity by itself; bearing bar size, spacing, span, load type and support conditions still govern the design.

What does 19-W-4 mean?

In imperial notation, 19-W-4 means bearing bars at 19-space pitch (about 1-3/16″ centers), W for welded construction, and cross bars at 4″ centers. The common metric equivalent is 30 mm bearing bar spacing with 100 mm cross bar spacing — our most common platform specification.

Which bearing bar spacing should I choose?

30 mm spacing is the most common for industrial platforms and walkways. The final specification depends on your span, load type and any opening-size safety requirements — confirm these before ordering.

Can you fabricate welded grating to my drawings?

Yes. Send layout drawings with panel sizes, span direction, cut-outs and banding requirements. Our CAD technicians detail each panel with project numbering for site installation.

What is the minimum order quantity?

For standard carbon steel specifications the minimum order is typically 10–20 m². Custom specifications and stainless steel start around 50 m² because of material and setup requirements — send your list and we will confirm what applies.

What is the production lead time?

Typical production lead time is 15–25 days after specification confirmation, depending on quantity and fabrication complexity. Samples of standard specifications usually take 3–7 days.

What is the maximum panel size you can weld?

Press-welded panels run up to about 6100 mm in the bearing bar direction and 1000–1200 mm wide, and are kept within a 70–100 kg handling limit. Larger areas are supplied as split panels numbered to your layout.

Keep Exploring

Galvanized Steel Grating Heavy Duty Steel Grating Industrial Platform Grating Walkway & Catwalk Grating Bearing Bar Spacing Guide How to Choose a Steel Grating Specification

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