Steel Bar Grating

Steel bar grating is pressure-welded panels formed by load bearing bars interlocked with twisted cross bars. It serves as industrial walkways, working platforms, stair treads, drainage trench covers and equipment flooring. Load bearing bars take vertical loads and must align with the support span direction; cross bars lock bearing bars in place to maintain structural stability. Plain bearing bars work well for dry indoor spaces, while serrated bearing bars deliver anti-slip performance for wet, oily or outdoor locations. We supply carbon steel grating in raw black finish, painted coating and hot-dip galvanized coating, as well as stainless steel grating built to customer drawings.

Specifications

Material: Mild carbon steel and stainless steel. Hot-dip galvanized carbon steel is the standard pick for outdoor platforms and trench drainage covers.

Bearing Bar Sizes: Standard stock sizes: 20×3mm, 25×3mm, 32×3mm, 40×3mm, 20×5mm, 25×5mm, 32×5mm, 40×5mm, 45×5mm, 50×5mm, 55×5mm, 60×5mm.

Bearing Bar Pitch: Standard center distances: 30mm, 40mm, 60mm. Custom pitches including 25mm, 33.5mm, 37.5mm and 50mm are available for special projects.

Cross Bar Pitch: Standard options 50mm and 100mm. Custom spacing like 25mm, 38mm, 50.8mm, 76mm and 101.6mm can be manufactured on request.

Surface Type: Plain smooth bearing bar or serrated anti-slip bearing bar. Serrated grating is recommended for all wet walking areas.

Panel Size: All panels cut to customer drawings. Max transport length for carbon steel raw panels sits at 6100mm; all dimensions adjusted to fit container and truck limits.

Surface Treatment: Raw black steel without coating, paint sprayed finish, hot-dip galvanized coating, natural mill finish for stainless steel.

Custom Fabrication: Straight cutting, full edge banding, toe plate welding, notch cutting, punching holes, stair tread side plate welding and fully customized panel shapes.

Grating Code Rule: Take G325/30/100 as an example: 32×5mm bearing bar, 30mm bearing bar center pitch, 100mm cross bar center pitch.

Installation Accessories: Saddle grating clips, fixing bolts, on-site welding, stair front nosing strips, side guard plates and metal support frames.

Production Standards: Manufacture complying with YB/T 4001.1 or ANSI/NAAMM MBG standards as specified by clients.

Required Order Information: Grating model code, raw material grade, plain or serrated surface, finished panel dimensions, bearing bar installation direction, surface coating, cut-out openings and preferred fixing method.

Application

Industrial Platforms & Walkways

Widely used for refinery working platforms, power plant maintenance paths, factory elevated decks and steel structure access routes. Select bearing bar dimensions according to support span and live load requirements.

Stair Treads & Access Steps

Serrated grating stair treads fit outdoor staircases, factory access steps and wet processing zones. Side guard plates and anti-slip nosing strips can be welded as per stair construction drawings.

Trench & Drainage Covers

Hot-dip galvanized grating is widely used for road trench lids, factory drainage channels, gutter covers and underground utility pit covers. Removable panels with full edge banding or lifting holes are available.

Equipment Floors & Service Zones

Installed around storage tanks, conveyor lines, cooling towers, general workshops and machine rooms. Custom cut-outs can be produced to fit pipe runs, support columns and equipment base openings.

Stock Product Specifications

G325/30/100 Steel Bar Grating, 32×5mm Bearing Bar

G325/30/100 standard grating adopts 32×5mm bearing bars at 30mm center pitch and 100mm cross bar spacing. Suitable for general industrial platforms, maintenance walkways and steel structure access decks.

Technical Specifications

Grating Code: G325/30/100

Bearing Bar: 32×5mm

Bearing Bar Pitch: 30mm

Cross Bar Pitch: 100mm

Material: Mild carbon steel

Surface Type: Plain or serrated bearing bar optional

Surface Treatment: Raw black steel, paint coating or hot-dip galvanized

Panel Size: Custom cut against project drawings

Applications

General industrial platform flooring

Factory maintenance walkways

Steel frame structure access decks

G403/30/50 Serrated Steel Bar Grating, 40×3mm Bearing Bar

G403/30/50 fully serrated grating features 40×3mm bearing bars at 30mm pitch with 50mm cross bar spacing. Designed for wet factory walkways, stair treads and outdoor service platforms.

Technical Specifications

Grating Code: G403/30/50

Bearing Bar: 40×3mm

Bearing Bar Pitch: 30mm

Cross Bar Pitch: 50mm

Surface Type: Full serrated bearing bar

Material: Carbon steel, stainless steel available upon order

Surface Treatment: Hot-dip galvanized coating as standard for outdoor usage

Custom Fabrication: Edge banding, toe plates and shape cut-outs can be processed

Applications

Outdoor maintenance platforms

Industrial stair tread panels

Factory walkways exposed to water or oil

Note: Bearing bars must run perpendicular to supporting steel beams to meet load capacity requirements.

G255/40/100 Steel Grating Panel, 25×5mm Bearing Bar

G255/40/100 medium load grating uses 25×5mm bearing bars at wider 40mm center pitch and 100mm cross bar spacing. Ideal for light & medium service platforms, workshop service floors and standard drainage trench covers.

Technical Specifications

Grating Code: G255/40/100

Bearing Bar: 25×5mm

Bearing Bar Pitch: 40mm

Cross Bar Pitch: 100mm

Material: Mild carbon steel

Surface Type: Plain smooth bearing bar

Surface Treatment: Raw uncoated steel, paint spray or hot-dip galvanized

Edge Finish: Open raw edge or fully banded edge

Applications

General factory service flooring

Light-duty drainage trench covers

Small maintenance access panels

G505/30/50 Heavy-Duty Steel Bar Grating, 50×5mm Bearing Bar

G505/30/50 heavy load grating comes with thick 50×5mm bearing bars for higher load bearing capacity, suitable for heavy industrial platforms, equipment service floors and high-load trench covers. Greater bar depth supports longer span distances and heavier vehicle loads.

Technical Specifications

Grating Code: G505/30/50

Bearing Bar: 50×5mm

Bearing Bar Pitch: 30mm

Cross Bar Pitch: 50mm

Material: Mild carbon steel

Surface Type: Plain or serrated bearing bar optional

Surface Treatment: Hot-dip galvanized, paint coating or raw black steel

Fixing Solutions: Saddle clips, through bolts or field welding installation

Applications

Heavy-duty industrial working platforms

Large equipment maintenance floors

High-load road and factory trench covers

Note: Confirm support span and required load rating before placing mass production orders.

G253/60/50 Light-Duty Steel Grating, 25×3mm Bearing Bar

G253/60/50 lightweight grating with thin 25×3mm bearing bars at wide 60mm center pitch and 50mm cross bar spacing. Applied for light drainage screens, ventilation flooring and low-traffic maintenance access areas without heavy wheel loads.

Technical Specifications

Grating Code: G253/60/50

Bearing Bar: 25×3mm

Bearing Bar Pitch: 60mm

Cross Bar Pitch: 50mm

Material: Mild carbon steel

Surface Type: Plain smooth bearing bar

Surface Treatment: Paint sprayed coating or hot-dip galvanized

Panel Length: Cut to any required length as per drawings

Applications

Light-weight drainage cover panels

Factory ventilation floor panels

Low-traffic maintenance walkways

Note: This light series is not suitable for regular heavy wheel loads; conduct load calculation before installation if vehicle traffic is expected.