Heavy Industrial ProductSeries MM-BG

Bar grating

High-capacity load-bearing assemblies for heavy industrial flooring

High-tolerance welded and press-locked grating panels designed for severe vehicular traffic, drainage trenches, and petrochemical plant walkways. Built to project specifications with custom banding, cutouts, and specialized anti-slip profiles.

Bearing bar depth3/4 in to 7 in
Bearing bar thickness1/8 in to 1/2 in
Standard spanUp to 24 ft
Cross bar spacing2 in or 4 in on center
Welded industrial steel bar grating panel
ASTM A123 Galvanized
Standard Panel Sizes: 3ft x 20ft / 3ft x 24ftCustom cut-to-size

Patterns & configurations

Configured for structural rigidity, self-cleaning capability, and traction across diverse operating environments.

19-W-4 Welded standard

Type 1

Most common industrial grating with cross rods resistance-welded to rectangular bearing bars.

Heavy-duty 15-W-4

Type 2

Engineered for severe vehicular traffic, heavy fork trucks, and highway bridge applications.

Press-locked

Type 3

Interlocking slotted bars hydraulic-pressed under pressure for clean architectural sightlines.

Swaged rectangular

Type 4

Lightweight aluminum bar grating with swaged cross bars for marine and water treatment.

Serrated anti-slip

Type 5

Deeply serrated bearing bar edges providing positive traction in wet, oily, or icy environments.

Materials & finishes
Certified raw stock manufactured to ASTM standards with protective treatments.

ASTM A36 Carbon steel

Finishes: Mill finish, hot-dip galvanized (ASTM A123), or shop painted.

Best for: General structural flooring, outdoor platforms, and municipal drainage.

Stainless steel (304 / 316 / 316L)

Finishes: Mill finish, bead-blasted, or electro-polished.

Best for: Chemical processing plants, food facilities, marine catwalks, and coastal installations.

6063-T6 Aluminum alloy

Finishes: Mill finish or clear anodized.

Best for: Corrosion-resistant pedestrian walkways, architectural screening, and wastewater plants.

Primary applications
Installed across infrastructure, industrial processing, and commercial facilities.

Drainage trench covers

Heavy vehicular loading capacity across streets, loading docks, and factory floors.

Mezzanine platforms

Open-grid flooring allowing light, air, and sprinkler penetration throughout facilities.

Refinery catwalks

High-traction walking surfaces for elevated industrial and petrochemical piping racks.

Bridge decking

Structural load-bearing assemblies designed to withstand heavy highway wheel loads.

Stair treads

Factory-fabricated treads complete with carrier plates and abrasive safety nosing.

Fabrication & custom span sizing

All bar grating assemblies are available in stock panels or fully fabricated ready for installation. Custom services include perimeter banding, toe plates, circular cutouts, staircase nosing, and heavy load anchor clips.

Fabrication Options

Bar grating types

Select standard or custom-engineered connections built to your project load and architectural specifications.

Welded Bar Grating
Welded Bar Grating
Industrial standard for strength and cost efficiency

Standard welded connection for general industrial flooring

Press-Locked Bar Grating
Press-Locked Bar Grating
Clean aesthetic lines with tight dimensional tolerances

Mechanically swaged connection without weld distortion

Riveted Bar Grating
Riveted Bar Grating
Maximum load distribution for heavy vehicular traffic

Mechanically riveted connection

Stair Treads
Stair Treads
Pre-fabricated with nosing and carrier plates for quick install

Grating fabricated for stair applications

Custom fabrication support

Need custom span or load capacity?

Send your structural requirements, clear span lengths, and load conditions. Our fabrication team will calculate precise specifications and provide a complete manufacturing quote.

Engineered load ratings

Deflection checks and concentrated or uniform load calculations.

Heavy-duty spans

Custom bar depth, bearing pitch, and alloy grades for extreme spans.

Detailed quote package

Full material breakdown, lead times, and manufacturing tolerances.