GB Standard Q235/Q235A/Q235B Series Galvanized Steel Grating | Custom Size Welded Steel Grating Manufacturer Royal Steel Group
| Product | Steel Grating |
| Material | Carbon Structural Steel — Q235 / Q235A / Q235B |
| Standard | GB |
| Dimensions | Width: 600–1500 mm Bar Height: 25–50 mm Mesh Spacing: 30–100 mm |
| Customization | Made-to-order sizes and mesh spacing accepted |
| Tolerance | Length ±2 mm Width ±2 mm Thickness ±1 mm |
| Quality Control | Spectrometer chemical analysis Tensile & hardness tests Flatness check Weld integrity test |
| Surface Finish | Hot-dip galvanized (HDG), Electro-galvanized, Powder coated / Painted, Black / Mill finish |
| Applications | Industrial walkways and platforms, Stair treads, Drainage covers, Warehouse & factory flooring, Ship decks and outdoor installations |
| Grating Type | Bearing Bar Pitch / Spacing | Bar Width | Bar Thickness | Cross Bar Pitch | Mesh / Opening Size | Load Capacity |
| Light Duty | 19 mm – 25 mm (3/4"–1") | 19 mm | 3–6 mm | 38–100 mm | 30 × 30 mm | Up to 250 kg/m² |
| Medium Duty | 25 mm – 38 mm (1"–1 1/2") | 19 mm | 3–6 mm | 38–100 mm | 40 × 40 mm | Up to 500 kg/m² |
| Heavy Duty | 38 mm – 50 mm (1 1/2"–2") | 19 mm | 3–6 mm | 38–100 mm | 60 × 60 mm | Up to 1000 kg/m² |
| Extra Heavy Duty | 50 mm – 76 mm (2"–3") | 19 mm | 3–6 mm | 38–100 mm | 76 × 76 mm | >1000 kg/m² |
| Category | Type / Grade | Spec (mm) | Typical Use & Notes |
| Bearing Bar (H × T) | Standard | 25×3, 30×3, 32×5 | Walkways, stair treads, maintenance platforms |
| Heavy-Duty | 40×5, 50×5, 60×10 | Parking lots, cargo terminals, long-span industrial floors | |
| Mesh Size (bearing pitch × cross bar pitch) | Series 1 — 30 mm | 30 × 50 / 100 | Widely used; high load capacity; meets major international codes |
| Series 2 — 40 mm | 40 × 50 / 100 | Cost-effective; light-load walkways, fencing | |
| Series 3 — 60 mm | 60 × 50 / 100 | Mining, wash plants — open mesh sheds debris | |
| Material Grade (Q235) | Q235A | No impact test | Indoor use, general structural parts, budget jobs |
| Q235B | 20°C Charpy V-notch | Standard spec; better weldability and toughness; major projects | |
| Surface Treatment | HDG | Zinc ≥ 610 g/m² | 20+ yr corrosion life; outdoor and marine exposure |
| Black / Painted | No zinc | Temporary work, low-budget or dry indoor jobs | |
| Surface Profile | Plain / Serrated | — | Serrated bars give reliable grip on oily or wet surfaces |
| Category | Item | Specification / Notes |
| Dimensions | Span (L) × Width (W) | State span direction — bearing bars run along the span |
| Structure | Bearing Bar Size | Height × Thickness, e.g. 32×5, 40×5 mm |
| Mesh Pitch | Bearing bar pitch × cross bar pitch (center-to-center) | |
| Material | Steel Grade | Q235B (standard), Q355B (high strength), SS304 / SS316 |
| Surface Finish | HDG, painted, or mill finish | |
| Configuration | Surface Profile | Plain (smooth) or serrated (anti-slip) |
| Special Cuts | Circular openings, notches, and cut-outs for pipe penetrations | |
| Edging | Banding & Safety | End-banding, toe boards (kick plates), stair nosing |
| Accessories | Fixing Clips | Saddle clips, G-clips, grating fasteners |
1. Walkways
Open-grid flooring for personnel traffic in plants, factories, and warehouses. Dirt, spills, and debris fall through rather than collect on the surface, reducing slip hazards.
2. Stair Treads
Industrial and commercial stair treads built for heavy foot traffic. Serrated bars or anti-slip inserts available for wet or oily conditions.
3. Work Platforms
Used in workshops and maintenance bays to support equipment and crews. Open construction gives natural ventilation and can be hosed down quickly.
4. Drainage Areas
Lets water, oil, and other liquids drain straight through. Installed outdoors, on factory floors, and over drainage channels for fluid handling.
Royal Steel Group supplies premium steel grating for clients worldwide, covering Middle‑East industrial platforms and American infrastructure developments. Our local support teams in the U.S. and Guatemala handle tough custom structural requirements. Built for heavy loads and dependable anti‑slip protection, our gratings are backed by eight well‑placed warehouses, delivering fast lead‑times and stable supply for major energy and mining projects.
Packing
Standard Export Packaging
Steel straps tightly secure grating bundles, with extra reinforcement to prevent bending and damage while in transit.
Custom Labels & Project Marking
We apply custom tags to every bundle, listing material grade, dimension data and project codes. This simplifies on‑site sorting and inventory work for your project.
Extra Protective Options
Wood pallets, protective sheeting and heavy‑duty packaging are available. These work well for long‑haul shipments or orders with high‑grade surface finish requirements.
Delivery
Production Lead Time
7‑15 business days upon order confirmation. Actual timing varies based on order volume and custom‑built specifications.
Versatile Shipping Solutions
We offer container loading, flat‑bed trucking and local last‑mile delivery services.
Handling & On‑Arrival Readiness
Our packaging is engineered for easy lifting and smooth loading/unloading. Goods arrive ready for field installation.
We maintain long‑term partnerships with major carriers including MSK, MSC and COSCO to deliver reliable, satisfying logistics support.
Every step of our operation follows ISO 9001 quality‑management protocols. We enforce rigorous controls across the full workflow — from sourcing packing materials all the way through transport vehicle dispatching.
1. What are its key benefits?
It delivers strong load‑bearing performance, good corrosion resistance and long‑term service life at competitive price points, well‑suited for industrial and heavy‑duty working conditions.
2. Does it comply with US and international standards?
Absolutely. Production can follow OSHA safety rules, ANSI/NAAMM specifications, ASTM A36 for base steel material, as well as ASTM A123 for hot‑dip galvanizing.
3. Where is steel grating commonly applied?
Typical use cases include industrial platforms, access walkways, trench covers, oil‑gas facilities, power stations and workshops.
4. Can I get custom sizes and specs?
Sure. We tailor bearing bar dimensions, bar spacing, panel overall sizes, material thickness, plus serrated anti‑slip surfaces to match your project needs.
5. What lifespan can I expect?
Proper hot‑dip galvanized grating can last over 20 years for regular outdoor service. Actual service life depends heavily on local climate and environmental exposure.
ROYAL GROUP
Address
Kangsheng development industry zone,
Wuqing district, Tianjin city, China.
Phone
Hours
Monday-Sunday: 24-hour Service
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