11/16 in. Bearing Bar Spacing Hot-Dip Galvanized Welded Steel Grating for Pedestrian Traffic

Name: 11/16 in. Bearing Bar Spacing Hot-Dip Galvanized Welded Steel Grating for Pedestrian Traffic
Brand: Gnee Steel (tianjin) Co., Ltd
SKU: Steel Grating
Price: 12.00 USD
Availability: InStock

Place of Origin:China

Brand Name:GNEE

Certification:SGS

Model Number:Steel Grating

Minimum Order Quantity:1 Pieces

Price:US$9.00-16.00 (FOB Price)

Product Details

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11/16 in. Bearing Bar Spacing Welded Steel Grating

Hot-Dip Galvanized Steel Bar Grating

Pedestrian Traffic Rated Galvanized Steel Grating

Product Description

11-W-4 Light Duty Welded Steel Grating

11-W-4 light duty welded steel grating is a close-mesh bar grating panel built with bearing bars at 11/16 in. (17.5 mm) on centre, resistance-welded to cross bars at 4 in. (100 mm) on centre, and hot-dip galvanized after fabrication. It is designed for pedestrian traffic applications including catwalks, mezzanines, platforms and public walkways where a tighter, safer mesh is prioritized over maximum span.

Two key specifications determine grating panel characteristics: bearing bar spacing and bearing bar depth. The 11-W-4 configuration features spacing at the tight end of the standard range, making it the preferred choice when safety concerns involve people, wheeled luggage, or dropped tools.

Understanding the 11-W-4 Designation

Code	Meaning	Value
11	Bearing bar spacing, in 16ths of an inch	11/16 in. (17.5 mm) c/c
W	Construction type	Welded — electro-forge resistance welding, no filler metal
4	Cross bar spacing, in inches	4 in. (100 mm) c/c

Bearing bar thickness is not part of the code designation and must be specified separately. The light duty standard is 3/16 in. (5 mm).

Standard Specifications

Item	Standard Range
Bearing bar	3/4 in. - 2-1/2 in. deep (19 - 63 mm) × 3/16 in. (5 mm)
Cross bar	Twisted square bar, 5 / 6 / 8 mm
Panel width	2 ft and 3 ft (610 / 914 mm); metric 1,000 mm
Panel length	Up to 24 ft (7,300 mm), cut-to-size per drawing
Material	Q235B / ASTM A36 / A1011 / S275JR / SS400; SS304 / SS316 on request
Surface	Plain (smooth) or serrated
Finish	Hot-dip galvanized per ASTM A123 / ISO 1461, average ≥ 85 µm (≈ 610 g/m²)
Standard	ANSI/NAAMM MBG 531

Benefits of Close Mesh Design

Enhanced safety: The 11/16 in. (17.5 mm) gap prevents heels, crutch tips, and most small dropped parts from passing through, and complies with the ≤ 35 mm anti-object requirement in EN ISO 14122-2.
Increased structural density: The 11-series configuration provides approximately 70% more bearing bars per foot compared to 19-W-4, distributing point loads across more bars and creating a stiffer walking surface.
Performance trade-offs: Open area decreases from about 80% (19-W-4) to approximately 70%, reducing drainage and light transmission while increasing weight to roughly 15 lb/ft² (≈ 74 kg/m²) for a 1 in. × 3/16 in. bearing bar before galvanizing.

ADA Compliance Note: 11-W-4 is widely accepted as ADA-friendly pedestrian grating. For applications requiring strict 1/2 in. (13 mm) sphere limits, verify the required opening specification and orient bearing bars perpendicular to the main direction of travel.

Indicative Span Capacity for Pedestrian Load

Bearing Bar	Indicative Clear Span at 5 kPa (100 psf)
3/4 × 3/16 in.	≤ 600 mm (2 ft)
1 × 3/16 in.	≤ 900 mm (3 ft)
1-1/4 × 3/16 in.	≤ 1,050 mm (3.5 ft)
1-1/2 × 3/16 in.	≤ 1,200 mm (4 ft)
2 × 3/16 in.	≤ 1,500 mm (5 ft)

These are conservative planning figures at L/200 deflection. Always consult the NAAMM MBG 531 load table for your specific span requirements before finalizing an order.

Typical Applications

Catwalks and mezzanine walkways
Pedestrian trench and sump-pit covers
Stair treads
Rooftop service walkways
Architectural screens and public-area flooring where appearance and foot safety are both important

11-W-4 Light Duty Welded Steel Grating product illustration showing close mesh pattern and construction details

Frequently Asked Questions

Is 11-W-4 strong enough for forklifts?

No. 11-W-4 is a light duty, pedestrian-rated panel. For pallet trucks, forklifts, or vehicle traffic applications, upgrade to heavy duty 19-W-4 grating with 1/4 in. bearing bars and provide wheel load and tire type specifications.

Do you supply banded ends and fixing clips?

Yes. Every panel includes end-banding with a welded flat bar, and we provide matching galvanized or stainless steel saddle clips — typically four per panel, two per end.

Can you cut panels to shape on site?

Panels can be cut with a grinder or saw on site; cut edges should be treated with cold galvanizing compound. For optimal results, provide layout drawings and we will handle cutting, banding, and galvanizing in our factory.

Product Summary

11-W-4 Light Duty Welded Steel Grating 11-W-4 light duty welded steel grating is a close-mesh bar grating panel built with bearing bars at 11/16 in. (17.5 mm) on centre, resistance-welded to cross bars at 4 in. (100 mm) on centre, and hot-dip galvanized after fabrication. It is designed for ...

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