Huaxia-Steel is a premier factory-direct supplier of carbon steel checkered plates (also known as tread plate, diamond plate, or floor plate) for industrial flooring, stair treads, vehicle flooring, and anti-slip applications worldwide. Our checkered plates comply with ASTM A786, JIS G3101, and EN 10025 standards. With competitive factory-direct pricing and reliable global logistics, we serve importers, fabricators, and industrial equipment manufacturers across international markets.
Product Overview
Checkered plate is a carbon steel plate with a raised pattern (typically diamond, lentil, or teardrop shaped) rolled onto one surface during hot rolling. The raised pattern provides excellent slip resistance in both dry and wet conditions, making it the material of choice for industrial walkways, platforms, stair treads, truck beds, and mezzanine flooring. The smooth reverse side allows for easy welding or bolting to supporting structures.
Pattern Types
| Pattern Type | Description | Pattern Height | Best Application |
|---|---|---|---|
| Diamond Pattern (std) | Single diamond raised pattern, most common | 1.0-2.0mm | General flooring, platforms, catwalks |
| Lentil Pattern | Oval/lentil shaped raised bars | 1.0-1.8mm | Decorative applications, moderate traffic |
| 5-Bar Pattern | Five parallel raised bars per pitch | 1.5-2.5mm | Heavy-duty industrial, vehicle ramps |
| Dual Diamond | Small diamond pattern (higher density) | 0.8-1.5mm | Light traffic, architectural |
| Teardrop / Round | Circular raised dots pattern | 1.0-1.5mm | Aesthetic applications, cleanrooms |
Specifications & Dimensions
| Parameter | Range | Notes |
|---|---|---|
| Base Thickness (excl. pattern) | 2.0mm – 12.0mm | Measured on smooth side |
| Pattern Height | 1.0mm – 2.5mm | Depends on base thickness and pattern type |
| Standard Width | 1,000 / 1,220 / 1,250 / 1,500 / 1,800 / 2,000 / 2,500mm | Custom widths available |
| Standard Length | 2,000 / 2,440 / 2,500 / 3,000 / 6,000 / 12,000mm | Cut-to-length available |
| Plate Weight | Calculated on base thickness + 25-35% for pattern | Approximate weight adder |
Available Grades
| Standard | Grade | YS (MPa) | TS (MPa) | Notes |
|---|---|---|---|---|
| ASTM A786 | A36 / A786 | ≥250 | 400-550 | Standard for checkered plate |
| JIS G3101 | SS400 | ≥245 | 400-510 | Japanese standard |
| EN 10025-2 | S235JR | ≥235 | 360-510 | European standard |
| GB/T 3277 | Q235B | ≥235 | 370-500 | Chinese standard |
| ASTM A786 | A572 Gr.50 | ≥345 | ≥450 | High-strength option |
| EN 10025-2 | S355JR | ≥355 | 470-630 | High-strength European |
Typical Applications
- Industrial Flooring: Factory floors, mezzanine decks, platform decking, loading docks — provides safe walking surfaces in oily and wet conditions.
- Stair Treads: Prefabricated stair treads with nosing for fire escapes, access stairs, and industrial staircases. Compliant with OSHA and IBC safety requirements.
- Vehicle Flooring: Truck beds, trailer decks, bus flooring, rail car flooring — withstands heavy impact and sliding loads.
- Equipment Guarding: Machine guards, safety barriers, and equipment enclosures where visibility and ventilation are required.
- Architectural: Decorative wall cladding, elevator interiors, column covers — modern industrial aesthetic.
- Offshore & Marine: Helideck landing surfaces, offshore platform decking, ship deck plating — certified to offshore standards upon request.
Quality Assurance
- Pattern Integrity: 100% visual inspection for pattern continuity, uniformity, and height consistency across the entire plate surface.
- Base Thickness: Ultrasonic thickness gauge measurement on the smooth (reverse) side at multiple points to verify minimum base thickness.
- Flatness: Checked against ASTM A6 flatness tolerances. Maximum deviation: 10mm per 2m for standard flatness.
- Chemical Analysis: OES verification of heat chemistry — certification for C, Mn, Si, P, S, and residual elements.
- Mechanical Testing: Tensile test per ASTM A370, bend test per ASTM A786. Results reported on the MTC.
- Surface Quality: Inspection for surface defects, lamination, cracks, and scale. Plate surface must be free of injurious defects.
Packaging & Shipping
Checkered plates are shipped in palletized stacks with the patterned (top) side protected during handling. Each stack is secured with steel strapping and clearly tagged. Standard export packaging:
- Standard Pallet: Plates stacked on wooden pallets, with protective sheets between plates to prevent pattern damage.
- Edge Protection: Steel edge protectors on all corners to prevent strap damage to plate edges.
- Weather Protection: Heavy-duty polyethylene tarp covering for open-top container shipments.
- Marking: Each plate stack tagged with grade, dimensions, pattern type, heat number, weight, and purchase order reference.
Delivery lead time: 10-20 days for stock sizes, 20-30 days for mill-rolled custom dimensions. We ship from major Chinese ports. Each shipment includes full export documentation: commercial invoice, packing list, bill of lading, mill test certificates (EN 10204 3.1), and certificate of origin.
Ready to source high-quality carbon steel products at competitive factory-direct prices? Contact Huaxia-Steel today for a free quotation and consultation. Our team provides full Mill Test Certificates (MTC), third-party inspection reports, and flexible shipping options worldwide.
