Carbon Steel Checkered Plate — Factory Direct Supplier | Huaxia-Steel
Carbon steel checkered plate — also known as diamond plate, tread plate, or durbar plate — is a hot-rolled steel plate with a raised pattern on one surface that provides exceptional slip resistance. Huaxia-Steel supplies carbon steel checkered plate in a full range of thicknesses, pattern types, and grades, sourced from ISO 9001 certified Chinese mills for export markets worldwide.
Product Specifications
| Parameter | Specification |
|---|---|
| Thickness (Base) | 2.0 mm, 2.5 mm, 3.0 mm, 4.0 mm, 4.5 mm, 5.0 mm, 6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm |
| Width | 1000 mm, 1219 mm (4ft), 1250 mm, 1500 mm, 1524 mm (5ft), 1800 mm, 2000 mm |
| Length | 2000 mm, 2438 mm (8ft), 2500 mm, 3000 mm, 3048 mm (10ft), 6000 mm; cut-to-size available |
| Pattern Types | Diamond (standard), lentil/teardrop, round bean, 5-bar (durbar style) |
| Pattern Height | 0.5-2.0 mm depending on base thickness (min 20% of base thickness per GB/T 3277) |
| Surface Condition | Hot-rolled (mill scale on reverse, pattern on face); oiled or primed on request |
| Base Thickness Tolerance | ±0.20 mm (t ≤5mm); ±0.30 mm (5 < t ≤8mm); +0.30/-0.50 mm (t >8mm) |
Available Grades
| Grade | Standard | Yield Strength (min) | Tensile Strength | Elongation (min) |
|---|---|---|---|---|
| A36 | ASTM A786 | 250 MPa | 400-550 MPa | 20% (200mm) |
| Q235B | GB/T 3277 | 235 MPa | 370-500 MPa | 26% |
| SS400 | JIS G3101 | 245 MPa | 400-510 MPa | 17% |
| S235JR | EN 10025-2 | 235 MPa | 360-510 MPa | 26% |
| St37-2 | DIN 17100 | 235 MPa | 360-510 MPa | 26% |
Pattern Types Comparison
| Pattern | Appearance | Slip Resistance | Cleanability | Common Usage |
|---|---|---|---|---|
| Diamond | Small diamond-shaped raised bars | Good — multi-directional | Moderate | General industrial flooring |
| Lentil/Teardrop | Elongated oval raised segments | Very good — directional | Good | Stair treads, ramps |
| 5-Bar (Durbar) | Alternating pattern of 5 parallel bars | Excellent — max 5-bar grip | Moderate | Heavy-duty vehicle decks |
| Round Bean | Circular raised dots | Moderate — omnidirectional | Excellent | Food processing, clean rooms |
Manufacturing Standards
- ASTM A786/A786M: Standard specification for hot-rolled carbon steel floor plates (primary international standard)
- GB/T 3277: Hot-rolled checkered steel plates and strips — the Chinese national standard covering pattern dimensions, base thickness, and tolerance
- EN 10025-2: Hot rolled products of structural steels (European — covers the base material properties)
- JIS G3101: Rolled steels for general structure (Japanese — SS400 material grade)
- AS/NZS 3678: Structural steel — hot-rolled plates, floor plates (Australia/New Zealand)
Weight Calculation
Checkered plate weight is calculated differently from flat plate because the raised pattern adds material:
| Base Thickness (mm) | Pattern Height (mm) | Effective Thickness (mm) | Weight (kg/m²) |
|---|---|---|---|
| 2.0 | 0.8 | ~2.4 | ~18.8 |
| 3.0 | 1.0 | ~3.5 | ~27.5 |
| 4.0 | 1.0 | ~4.5 | ~35.3 |
| 4.5 | 1.2 | ~5.1 | ~40.0 |
| 5.0 | 1.5 | ~5.75 | ~45.1 |
| 6.0 | 1.5 | ~6.75 | ~53.0 |
| 8.0 | 2.0 | ~9.0 | ~70.7 |
| 10.0 | 2.0 | ~11.0 | ~86.4 |
Note: Effective thickness varies by pattern type. Diamond pattern shown above. Contact us for exact weights for your specified pattern and thickness combination. Weight formula: W = (base thickness + pattern factor) × 7.85 kg/mm/m².
Typical Applications
- Industrial flooring: Mezzanine floors, walkways, platforms, and catwalks in factories, warehouses, and processing plants where slip resistance is critical
- Stair treads and landings: Pre-fabricated stair treads with nosing profiles for fire escapes, access stairs, and industrial staircases per OSHA and EN 14122 requirements
- Vehicle decks: Truck and trailer bed flooring, loading ramps, and step surfaces for commercial vehicles and heavy equipment transporters
- Trench and pit covers: Removable floor plates over cable trenches, drainage channels, and equipment pits
- Architectural: Decorative wall panels, column cladding, and feature elements where the textured surface provides visual interest
- Marine and offshore: Deck plates, helideck surfaces, and walkway grating in marine environments (with corrosion protection applied)
Quality Assurance
- Mill Test Certificate (EN 10204 3.1): Chemical composition and mechanical properties per applicable material standard (ASTM, GB, EN, JIS)
- Dimensional inspection: Base thickness at multiple points, pattern height verification, width and length measurement, flatness check
- Pattern quality: Visual inspection for pattern consistency, continuity, and absence of rolled-in defects across the plate surface
- Surface inspection: Check for laminations, surface cracks, and scale defects on the reverse (plain) side
- Optional testing: Slip resistance (pendulum test per BS 7976 or ramp test per DIN 51130), third-party inspection (SGS/BV/TUV)
Packaging and Shipping
Checkered plate requires careful handling to protect the raised pattern surface:
- Plates stacked pattern-to-pattern with protective interleaving (kraft paper or thin plywood) to prevent pattern damage
- Bundled with steel strapping (4-6 bands per bundle, 2-3 tons per bundle)
- Edge protectors on strapping points to prevent indentation
- Wooden dunnage at 1-meter intervals for flat, supported stacking
- Loading into 20ft containers (standard plate sizes: 1250×2500mm, 1500×3000mm); 40ft for 1500×6000mm
- Optional VCI paper interleaving + PE film wrap for ocean freight protection
- Leading ports of loading: Tianjin, Shanghai, Qingdao
Request a Quote for Checkered Plate
Contact Huaxia-Steel with your checkered plate requirements — base thickness, width, length, pattern type, grade, quantity, and destination port. We respond with FOB/CIF pricing, lead time, and shipping schedule within 24 hours.
