Mild Steel Chequered Plates
High-tensile structural carbon steel plates providing robust impact resistance, heavy rolling-load support, and superior weldability for roadways, loading docks, and factories.
Engineering Excellence & Export Authority
Certified Industrial Chequered Plates Engineered to Exact Project Drawings
Omkar Gratings Pvt Ltd is a premier Indian manufacturer and global exporter of high-strength chequered plate flooring. Designed specifically for industrial environments where oil, water, sludge, or heavy vehicular and pedestrian traffic create hazardous slipping conditions.
Our chequered plates are produced with precision-rolled raised patterns (tear-drop, diamond, or lentil configurations) that guarantee multidirectional slip resistance. Available in self-colour black, shop-primed, painted, or hot-dip galvanized finishes, as well as pickling-passivated stainless steel and lightweight structural aluminium.
Whether you require standard stock sheets, sheared plates, custom CNC profiles with cut-outs, or fully assembled trench covers reinforced with structural angle frames, our engineering team manufactures and ships strictly aligned with project specifications and international ASTM, EN, and ISO norms.
3–25 mmAvailable thickness range over plain surface
Up to 12 mPanel lengths rolled and processed to drawing
3 MetalsMild Steel, Stainless Steel & Aluminium
ISO 1461Hot-dip galvanizing for harsh outdoor environments
Core Material Offerings
Comprehensive Metal Grades & Traction Patterns
We process an extensive selection of primary metals and surface finishes to meet mechanical strength, corrosive atmospheric resistance, and sanitary workplace compliance.
Stainless Steel Chequer Plates
Engineered for food processing plants, chemical facilities, pharmaceutical cleanrooms, and coastal/marine structures requiring non-corrosive, easily sanitized surfaces.
Aluminium Chequer Plates
Lightweight, spark-resistant, and naturally corrosion-proof alloy panels featuring 5-bar (willow leaf) or diamond designs for marine vessels, refrigerated vehicles, and walkways.
Technical Matrix
Standard Specifications & Dimensions
Review engineering tolerances, base thickness measurements, and pattern standards below. Custom sizes and thickness requirements can be accommodated.
| Parameter | Mild Steel Chequered Plates | Stainless Steel Chequered Plates | Aluminium Chequered Plates |
|---|---|---|---|
| Standard Material Grades | IS 2062 E250 / ASTM A36 / DIN EN 10025 S235JR / S275JR | AISI 304, AISI 304L, AISI 316, AISI 316L, AISI 321 | Alloy 5754 (AlMg3), Alloy 5052, 6061-T6, 1050 / 3003 |
| Base Thickness (Over Plain) | 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm, 16 mm, 20 mm, 25 mm | 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm | 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm |
| Pattern Configurations | Tear Drop / Lentil Pattern, Single Diamond, Chequer | Tear Drop, Raised Diamond, Checkered Motif | 5-Bar (Willow Leaf), 2-Bar (Duet), Diamond Stucco |
| Pattern Height | 0.8 mm to 2.2 mm (governed by plate base thickness) | 0.8 mm to 1.8 mm (precision cold-rolled embossing) | 0.8 mm to 1.5 mm (hot/cold rolled raised ribs) |
| Plate Widths | 1000 mm, 1200 mm, 1250 mm, 1500 mm (up to 2000 mm on request) | 1000 mm, 1220 mm, 1250 mm, 1500 mm | 1000 mm, 1220 mm, 1250 mm, 1500 mm |
| Plate Lengths | 1500 mm to 12000 mm (Cut-to-length / Sheared / Laser cut) | 2000 mm, 2440 mm, 3000 mm, 6000 mm | 2000 mm, 2440 mm, 2500 mm, 3000 mm |
| Surface Protection & Finishes | Self-colour (bare black), Shop Primer, Hot-Dip Galvanized to ISO 1461 | Pickled & Passivated, Mill 1D / 2B, Electro-Polished | Mill Finish, Anodized (Natural / Colored), Chequer Bright |
| Fabrication Options | Perimeter angle frame welding, stiffeners, bolt holes, lifting lugs | CNC bending, waterjet cutouts, countersunk fixings, kick plates | Precision shearing, pre-drilling, edge chamfering, tray folding |
* Note: All base sheet thicknesses are verified over plain metal (excluding pattern projection height) in strict compliance with EN 10051 and ASTM A786 tolerances.
Turnkey Prefabrication
Frames, Angle Edging & Reinforced Assemblies
For ease of site placement and rapid project turnaround, Omkar Gratings supplies fully fabricated, ready-to-install chequered plate assemblies. We supply plates mounted within perimeter structural angle frames or channel sub-bases to fit civil openings directly.
- Welded Angle Framing: Continuous seal or stitch-welded perimeter angles (equal and unequal angles) for flush seating into concrete rebate recesses.
- Structural Stiffeners: Underside flat bar or hollow-section stiffeners designed to resist heavy point wheel loads and eliminate plate deflection.
- Custom Features: Countersunk fastener holes, flush drop-down lifting handles, hinged hatch designs, and CNC-cut clearance apertures for pipes and conduits.
Corrosion Protection
Heavy Duty Hot-Dip Galvanizing & Advanced Coatings
Chequered plates exposed to moisture, marine coastal salt, chemicals, and industrial washdowns require rigorous corrosion barriers. We provide certified hot-dip galvanizing to ISO 1461, ASTM A123, and BS EN ISO 1461 standards in automated galvanizing baths.
- Zinc coating thickness of 610 g/m² (85 µm nominal) or custom thick-layer specifications for extended service life.
- Clean, uniform pattern sharpness maintained without zinc webbing or tears on pattern peaks.
- Optional high-build epoxy, zinc-phosphate primers, and polyurethane polyurethane top-coats for chemical processing zones.
Industry Proven Solutions
Where Our Chequered Plate Flooring Is Installed
Trusted across demanding industrial infrastructure, civil constructions, petrochemical plants, and marine terminals worldwide.
Power & Energy Plants
Boiler room access walkways, turbine deck floor plates, and electrical trench covers.
Oil, Gas & Refineries
Offshore living quarter decks, chemical dosing platforms, and hydrocarbon storage trenching.
Logistics & Warehousing
Forklift transfer ramps, loading dock levellers, mezzanines, and road weighbridge decks.
Food & Pharmaceutical
Hygienic stainless steel slip-resistant flooring, drainage manhole covers, and washdown bays.
Highways & Bridges
Expansion joint covers, utility trench plates, stormwater sump covers, and temporary road decking.
Water & Wastewater
Pump room flooring, aeration basin covers, channel plates, and sludge drying facility steps.
Mining & Heavy Foundries
Extreme wear plates, impact resistant conveyor walkways, and heavy equipment access floors.
Commercial & Architectural
Emergency staircases, fire escapes, escalator transition plates, and architectural facades.
Quality Assurance & Standards
Strict International Compliance & Testing
Every chequered plate leaving our fabrication facility undergoes rigorous quality control checks to ensure dimension accuracy, slip resistance, and structural integrity.
EN 10204 3.1 Mill Test Certification supplied with verified chemical composition and tensile testing.
ASTM A786 / EN 10051 Dimensional, flatness, thickness over plain, and pattern height conformance.
ISO 1461 / ASTM A123 Coating thickness magnetic testing (Elcometer) and adhesion checks for hot-dip galvanizing.
Seaworthy Packing Steel strapping, corrosion-inhibitor wrapping, and fumigated wooden pallets for ocean freight.
Frequently Asked Questions
Technical Inquiries from Overseas Buyers
What is the difference between measuring plate thickness over plain vs. over pattern?
In international manufacturing standards (such as ASTM A786 and DIN EN 10051), nominal plate thickness is strictly measured on the base plain sheet portion, excluding the height of the raised tear drops or diamonds. The pattern height typically adds an extra 0.8 mm to 2.2 mm depending on plate thickness, which is crucial for engineers calculating dead weight and load-bearing capacity.
Can Omkar Gratings provide custom cutting, edge notches, and pipe cut-outs?
Yes. Our state-of-the-art CNC shearing, plasma, and high-definition laser cutting lines allow us to fabricate chequered plates to complex site layouts. All cut-outs, pipe penetrations, bevelled corners, and edge notches are deburred and banded or framed as required by your engineering drawings.
What is the maximum span and load capacity for chequered plate trench covers?
Span capacity depends directly on the base thickness, material grade, and presence of underside stiffener ribs. For pedestrian walkways, a 4 mm or 5 mm plate is typically supported over spans of 400 mm to 600 mm. For forklift or heavy truck wheel traffic, 8 mm to 25 mm plates supported by welded angle or hollow section beams are recommended. Our structural team provides customized span-load calculations upon request.
How are stainless steel chequered plates treated to prevent oxidation after fabrication?
Following laser cutting, welding, and framing, all stainless steel (AISI 304 and AISI 316) chequered plates undergo chemical acid pickling and passivation. This removes all weld heat tint, free iron contaminants, and rolling residues, restoring the microscopic protective chromium oxide passive layer.
What export documentation and shipping terms are supported?
We supply complete export documentation including Commercial Invoices, Packing Lists with panel mark numbers, Mill Test Certificates (EN 10204 3.1), Certificates of Origin, and Fumigation Certificates. We offer FOB (Nhava Sheva / Mundra), CFR, CIF, and DDU shipping terms to all global seaports.
Require Project-Specific Drawings, Load Calculations, or Material Samples?
Contact our specialized technical sales division for custom quotations, fabrication advice, and full product specifications for international procurement.