Mutual Metal • Industrial Floor Systems
Five-Bar Raised PatternASTM A786 / DIN 59220

Five-bar industrial tread plate

Five parallel raised ribs per repeat pattern deliver reliable multi-directional slip resistance. Hot-rolled or cold-formed into carbon steel, 304/316 stainless steel, and 3003/6061 aluminum plate for severe commercial environments.

Available alloys
Carbon steel (A36 / S235JR)
Stainless steel 304 / 316L
Aluminum 3003-H22 / 6061-T6
Hot-dip galvanized finish optional
5-BAR EMBOSSED SCHEMATIC90° CLUSTER
DIN 59220 / ASTM A786Traction Index: R11 / R12
Standard stock supplyMill Certified

Full mill bundles or individual cut-to-print stair treads and walkway planks shipped directly from distribution inventory.

Browse fabricated stair treads

Engineering parameters

Standard ASTM A786 / DIN 59220
Pattern height
1.0 mm – 2.0 mm

Raised rib profile for drainage & positive grip

Gauge range
3/16 in to 1/2 in

4.5 mm to 12.7 mm structural base plate

Sheet dimensions
4 × 8 ft, 4 × 10 ft, 5 × 10 ft

Custom cut-to-length blanks available on order

Pattern pitch
5 parallel ribs / unit

Alternating 90° orientation across sheets

Field applications

Industrial platforms & walkways

Slip mitigation around machinery, process vessels, and wash bays.

Stair treads & nosings

Self-draining safety walking surfaces on interior and outdoor staircases.

Mezzanine flooring

Heavy wheel and pallet jack capability across elevated storage tiers.

Catwalks & service bridges

Consistent all-weather foot traction for plant maintenance staff.

Standard Specifications

Five-bar checkered plate specifications

Dimensional ranges, material alloys, and standard sheet configurations for industrial slip-resistant applications.

Gauge range & thickness
Metric and imperial plate base thickness
16 Gauge
1.5 mm (0.059 in)
14 Gauge
2.0 mm (0.078 in)
12 Gauge
2.5 mm (0.098 in)
1/8 in Nominal
3.0 mm (0.118 in)
3/16 in Nominal
4.5 mm (0.177 in)
1/4 in Nominal
6.0 mm (0.236 in)
3/8 in Heavy
8.0 mm (0.315 in)
1/2 in Heavy
10.0 mm (0.394 in)
Available alloys
Structural and corrosion-resistant grades
Carbon Steel
ASTM A36, Q235B, S275JR
Stainless Steel 304
General chemical and food grade
Stainless Steel 316
Marine and corrosive salt environments
Aluminum 6061-T6
High-strength structural framing
Aluminum 3003-H22
Formable tread plate for vehicle flooring
Pattern height & spacing
Raised five-bar anti-skid dimensions
Bar projection height
1.0 mm – 1.8 mm
Bar bundle width
32 mm – 38 mm
Pattern orientation
90° alternating 5-bar
Anti-slip rating
DIN 51130 R11 – R12
Surface coverage
Uniform cross-directional grip
Sheet dimensions
Standard warehouse stock and cut-to-length
1000 x 2000 mm
39.37 x 78.74 in
1219 x 2438 mm
4 x 8 ft (Standard)
1250 x 2500 mm
49.21 x 98.42 in
1500 x 3000 mm
5 x 10 ft (Heavy duty)
Custom shears
Cut-to-size stair treads & panels
Standard surface finishes
Protective and aesthetic surface states
Hot-rolled mill finish
As-rolled with light oil
Hot-dip galvanized
ASTM A123 / ISO 1461 zinc coat
Pickled & passivated
Stainless acid treated
Bright mill finish
Clean unpolished aluminum
Powder coated
Polyester resin RAL color series
Theoretical weights
Approximate reference weights per square meter
Steel 2.5 mm base
approx. 21.6 kg/m² (4.4 lb/ft²)
Steel 3.0 mm base
approx. 25.5 kg/m² (5.2 lb/ft²)
Steel 4.5 mm base
approx. 37.3 kg/m² (7.6 lb/ft²)
Alum 3.0 mm base
approx. 9.1 kg/m² (1.86 lb/ft²)
Alum 4.5 mm base
approx. 13.2 kg/m² (2.70 lb/ft²)

All weights and tolerances follow ASTM A786 and EN 10025-2 standards. Detailed mill certificates supplied upon dispatch. ASTM A786 / EN 10025

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