Engineered Around Your Load & Span
Heavy Duty Steel Grating
Heavy duty steel grating uses deeper, thicker bearing bars and tighter spacing to carry forklifts, trucks and heavy industrial equipment. It serves loading docks, driveways, heavy trench covers and industrial yards — and every heavy-duty specification is confirmed against span, wheel load and support conditions before quotation, because load capacity is engineered, not assumed.
- For wheel loads, forklifts and heavy equipment
- Bearing bars up to 100 × 10 mm
- Span, wheel load and support conditions confirmed before quotation
- Manufactured per NAAMM MBG 532 or project specifications
What is heavy duty steel grating?
Heavy duty steel grating is bar grating designed for vehicular and heavy equipment loads — loading docks, driveways, heavy trench covers, airport and port pavements and industrial yards. It uses larger bearing bars, tighter spacing and often thicker cross bars than standard walkway grating.
Because wheel loads concentrate force on small contact areas, heavy-duty selection must consider wheel load, tire contact area, span, support conditions, traffic frequency and safety factors together. We confirm all of these before quoting — a grating named "heavy duty" without these inputs is only a label, not a rating.
Light, medium and heavy duty are market categories, not absolute standards. Actual capacity depends on bearing bar height, thickness and spacing, material strength, span, support conditions and load type together — which is why we never quote vehicle-rated grating without those inputs.
Applications
Where Heavy Duty Steel Grating Is Used
Industrial Flooring
Mezzanine and factory flooring that combines load capacity with light, air and sprinkler penetration.
View application
Trench Covers & Drainage
Drainage covers that keep water moving and traffic safe — from pedestrian channels to truck crossings.
View application
Industrial Platform Grating
Open-grid flooring for chemical plants, equipment platforms and mezzanines — strength, drainage and ventilation in one panel.
View application Industrial Flooring
Mezzanine and factory flooring that combines load capacity with light, air and sprinkler penetration.
View applicationSpecifications
Specification Options
| Item | Options | Notes |
|---|---|---|
| Material | Q355 high-strength steel (comparable to A572 Gr.50 / S355JR); Q235 for moderate duty | Supplied per project specification with MTC |
| Bearing bar size | 40 × 5 mm to 100 × 10 mm | Sized by load calculation, not by label |
| Bearing bar spacing | 30 / 40 mm | Tighter spacing distributes wheel loads |
| Cross bar | Twisted square bar at 50 / 100 mm | Heavier cross bars for vehicle panels |
| Surface type | Plain / serrated | Serrated where vehicle areas are wet or oily |
| Finish | Hot-dip galvanized after fabrication | Per ASTM A123 / ISO 1461 or customer standard, verified by inspection reports |
| Panel limits | Up to 6100 × 1000/1200 mm; 70–100 kg per piece handling limit | Larger areas split into numbered panels |
| Load confirmation | Wheel load, contact area, span and support conditions required | Confirmed before quotation — capacity is engineered, not assumed |
Variants
Recommended Types
Forklift-rated grating
For warehouse aisles, docks and factory floors with regular forklift traffic — specified against wheel load, contact area and span.
Truck-rated trench & driveway grating
Heavy bearing bars with load banding for yard crossings and trench covers under truck traffic.
Heavy-duty serrated grating
Adds slip resistance where vehicle areas are also wet, oily or exposed to weather.
Compound heavy-duty grating
Grating topped with checkered plate where small-object containment or a solid running surface is needed; weight and drainage trade-offs apply.
Material strength vs section size
Q355 offers a higher yield-strength basis than Q235, but that does not make every Q355 panel automatically lighter. Bearing-bar depth, thickness and spacing still control section capacity, while wheel contact, clear span, edge banding, welds and support details decide how the load enters the panel. The selected grade and the selected geometry must therefore be checked together.
Use Q355 when the calculation shows that material strength governs and the project specification accepts that grade. Increase bar depth or thickness, reduce spacing or shorten the span when stiffness, deflection, local wheel effects or support conditions govern. Because Q235 and Q355 have broadly similar elastic stiffness, changing grade alone may not solve a deflection limit.
There is no defensible universal percentage for how much section Q355 can save. The answer comes from the actual wheel load, contact area, span, traffic pattern and allowable deflection; quotation should follow that check rather than a rule-of-thumb reduction. Finish and outdoor corrosion protection are specified separately after the load-carrying section is fixed.
- Q235: retain where the verified section meets strength, stiffness and project requirements
- Q355: consider where strength governs, then recheck deflection, welds and support details
- Change section geometry when stiffness or concentrated wheel effects govern the design
- Provide wheel load, contact area, clear span, support width and traffic frequency for selection
Fabrication & QC
Fabrication & Quality Notes
- Heavy panels are welded with full fusion at each intersection; load banding is welded to panel edges that carry wheel loads.
- Bearing bars up to 100 × 10 mm are cut, drilled and coped to drawing before welding.
- Load data can be referenced to NAAMM MBG 532 or project specifications, confirmed for your span and support conditions.
- Each panel is checked for bar size, spacing, weld quality, flatness and dimensions; coating thickness is verified after galvanizing.
Packaging
Packaging & Delivery
- Reinforced strapping and blocking to prevent deformation of heavy panels in transit.
- Panels tagged with project numbers matched to installation zones and drawings.
- Steel frame packing for long or high-value heavy panels; container loads planned around panel weight and destination limits.
Gallery
Heavy Duty Steel Grating in Detail
FAQ
Heavy Duty Steel Grating FAQs
Can your grating carry trucks or forklifts?
What standard do you follow for heavy duty grating?
What information do you need to quote heavy duty grating?
What is the largest bearing bar you can weld?
Can heavy duty grating be galvanized?
What is the lead time for heavy duty grating?
Do you provide load tables or calculations?
Send Your Drawings, Get a Confirmed Specification
Complete inquiries are typically answered within 24 hours during business hours.