2. Applicable Standards
Our products are manufactured and inspected in strict accordance with:
Chinese Standards: GB/T 4053.3-2009 (Fixed steel ladders, platforms and guardrails), YB/T 4001.1-2019 (Steel grating).
International Standards: ANSI/NAAMM MBG 531 (USA), BS 4592-1 (UK), AS 3996 (Australia).
Coating Standard: Hot-dip galvanizing complies with GB/T 13912-2020 / ISO 1461 (Minimum average coating thickness ≥65μm).
3. Material & Dimensions
Materials:
Load Bars: Carbon SteelQ235B ,Q355B, A36, S235JR,S355 ;Stainless Steel 304/316 available on request.
Cross Bars: Twisted square bars or round bars .
Surface Finish: Hot-Dip Galvanized (HDG).
Standard Specifications:
Bar Height (H): 20mm to 100mm.
Bar Thickness (t): 3mm to 20mm.
Bearing Bar Spacing (P): 30mm, 40mm (Most Common), 50mm, 60mm.
Cross Bar Spacing (S): 50mm, 100mm (Most Common).
Panel Width: 300mm to 1000mm (Customizable up to 1200mm).
Panel Length: 1000mm to 6000mm (Customized based on transport limits).
4. Applications
Industrial: Chemical plant walkways, power station platforms, wastewater treatment access, oil rig decks.
Municipal: Drainage trench covers, storm water grates, anti-slip pedestrian paths.
Transportation: Port docks, airport boarding bridges, highway noise barrier bases.
Construction: Stair treads, ceiling grids, safety fencing.
5. Frequently Asked Questions (FAQ)
Q: What is the service life of hot-dip galvanized grating?
A: In normal atmospheric conditions, the HDG coating provides 20-30 years of protection. In highly corrosive environments (e.g., chemical plants), expect 10-15 years, depending on pH levels and exposure.
Q: How is the load-bearing capacity calculated?
A: Capacity depends on bar height, thickness, and spacing. We provide free load calculation reports to select the right specification based on your span and expected loads (uniform or concentrated).
Q: Does installation require welding?
A: Both welding and clip (clamp) fixation are options. Welding is more permanent but requires touch-up painting; clips allow for easy removal and preserve the galvanized surface, ideal for maintenance access.
Q: What should I do if white rust appears on the surface?
A: White rust is a natural oxidation of zinc in humid conditions and does not compromise protection. It can be brushed off if excessive. If red rust appears, grind and apply a zinc-rich paint.
Q: Can you customize irregular shapes?
A: Yes. We can cut circular, sector, trapezoidal, and other custom shapes per your drawings. Cut edges are treated with zinc-rich paint for corrosion protection.
Q: How is the anti-slip performance?
A: Serrated (toothed) bearing bars offer superior anti-slip properties, ideal for oily or wet environments. Plain bars are suitable for indoor areas where foot comfort is prioritized.
Q: Is there a minimum order quantity (MOQ)?
A: Generally, there is no strict MOQ, but small orders may incur additional processing or shipping fees. Please consult us for specific square meter or tonnage requirements.
Q: What is the typical lead time?
A: Standard specs from stock can ship within 3-5 days. Custom specifications typically take 7-15 working days, depending on order volume.
Q: Can the grating withstand vehicle traffic?
A: Yes. Heavy-duty grating with increased bar height (e.g., >50mm) and reduced spacing can support trucks and heavy machinery, commonly used in parking lots and logistics channels.
Q: How to clean and maintain the grating?
A: The open mesh design allows for self-cleaning via rainwater. Periodic high-pressure washing prevents debris buildup. No special maintenance is required.
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