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Help CenterSteel Sheet & Plate & Checkered Steel Plate，Q235B、Q235、CCSA、CCSB、AH36、DH36、1060、3003、5052
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1. Product Definition
Checkered plate, also known as tread plate or diamond plate, is a special structural steel plate with continuous three-dimensional raised patterns rolled integrally by hot rolling process. The base plate and patterns are metallurgically bonded without risk of delamination or peeling. Its core functions include anti-slip & wear resistance, decorative effect, improved bending stiffness of the plate surface, and steel material saving.
Compared with plain flat steel plates, the three-dimensional patterns greatly increase surface friction coefficient, effectively preventing slipping of personnel or vehicles under humid, oily or waterlogged conditions. It is widely adopted for anti-slip load-bearing parts such as industrial walkways, ship decks, vehicle bottom plates and building stair platforms.
2. Main Applicable Standards
2.1 Domestic Chinese National Standards
GB/T 33974-2017 Hot-Rolled Checkered Steel Plates and Strips (Current core standard, replacing old GB/T 3277)
GB/T 700 Carbon structural steels (Substrate Q235B, Q195)
GB/T 1591 High-strength low-alloy structural steels (Q355B low-alloy checkered plate)
GB/T 712 Hull structural steel (CCS certified marine checkered plate for shipbuilding)
GB/T 4237 Stainless steel hot-rolled plates and strips
2.2 International Standards for Export Projects
JIS G3101 Japanese structural checkered steel plate
ISO 7802 General international specification for anti-slip patterned steel plate
ASTM A786 Standard specification for hot-rolled carbon steel checkered plates
3. Complete Product Classification
3.1 Classified by Surface Pattern (4 standard types per national standard)
Lenticular Pattern (BD, mainstream type in market)Continuous oval lenticular protrusions, featuring top-tier anti-slip performance, easy cleaning and low dust accumulation with strong load-bearing capacity. Suitable for heavy-duty, humid and oily scenarios: factory stair treads, ship decks, truck floors and ramp platforms.
Diamond Pattern (LX)Interlaced three-dimensional diamond textures with multi-directional anti-slip effect and neat decorative appearance. Applied for equipment operation platforms, decorative walkways and light-duty factory flooring.
Round Bean Pattern (YD)Uniform circular convex dots with soft walking touch and easiest cleaning performance, mainly used for food workshops, mall staircases, clean rooms and light-duty equipment panels.
Mixed Composite Pattern (ZH)Combined lenticular & diamond textures balancing high anti-slip property and aesthetics, customized exclusively for high-end special projects.
3.2 Classified by Base Plate Material
Ordinary carbon checkered plate (Q235B, Q195)Highest cost performance, basic general anti-slip structural material, delivered in hot-rolled black oxide finish; hot-dip galvanizing or painting anti-corrosion treatment available on request.
High-strength low-alloy checkered plate (Q355B)Higher yield strength with improved load capacity at identical thickness, ideal for heavy machinery platforms, heavy-duty trucks and large vessels.
CCS certified marine checkered plate (CCSA / CCSB)Compliant with GB/T 712 hull steel standard and certified by China Classification Society (CCS), resistant to marine salt spray and seawater corrosion, specially supplied for ship decks and cabin walkways.
Aluminum checkered plate (5-bar / pointer pattern)Lightweight and corrosion-resistant, applied for vehicle interior, curtain wall decoration and lightweight equipment anti-slip panels.
3.3 Classified by Anti-corrosion Surface Treatment
As-hot-rolled black finish (basic delivery status)
Hot-dip galvanized checkered plate (zinc coating ≥80μm, anti-corrosion for outdoor open-air walkways)
Pickled & shot-blasted checkered plate (scale removed for convenient welding & painting)
Painted / epoxy coated checkered plate (custom color integrating decoration and anti-corrosion)
4. Specification Parameters
4.1 Dimension Range
Base plate thickness: 2.0mm～12mm; common sizes: 2.5/3.0/3.5/4.0/5.0/6.0/8.0mm
Width: Standard widths 1250mm & 1500mm; customized range 600–1800mm with 50mm increment
Length: 2000mm～12000mm, fixed-length cutting, random cutting and special-shaped blanking available
Pattern height: ≥0.2 times base plate thickness, minimum height no less than 0.5mm to meet anti-slip standard requirements
4.2 Theoretical Weight Reference (kg/㎡, slight deviation for different patterns under same thickness)
| Base Thickness | Lenticular Pattern | Diamond Pattern | Round Bean Pattern |
|---|---|---|---|
| 2.5mm | 21.3 | 21.6 | 21.1 |
| 3.0mm | 24.4 | 25.6 | 24.3 |
| 4.0mm | 32.4 | 33.4 | 32.3 |
| 5.0mm | 40.2 | 41.2 | 40.0 |
4.3 Edge Condition
EC (Cut Edge): Smooth burr-free side edges for direct splicing and welding
EM (Uncut Edge): As-rolled rough edges with lower cost, suitable for secondary field cutting
5. Core Technical Performance Advantages
Integral hot rolling without delaminationPatterns and substrate are metallurgically bonded during one-pass hot rolling; no pattern peeling or delamination during bending, stamping or welding, far longer service life than composite plates with post-pressed patterns.
High anti-slip & wear resistanceThree-dimensional protrusions significantly raise surface friction coefficient, stable anti-slip performance under water, oil, rain and snow conditions; raised patterns resist abrasion from long-term pedestrian and vehicle load without premature flattening failure.
Lightweight material saving & enhanced bending rigidityThree-dimensional patterns act as built-in stiffeners; thinner base plates can be adopted to meet equal load-bearing demand, saving 15%–25% steel consumption compared with plain flat plates and reducing overall project cost.
Excellent machinabilityCompatible with flame cutting, plasma cutting, bending & edge rolling, punch hole stamping, SMAW & SAW welding; cold forming without cracking, simple construction process.
Multiple anti-corrosion options for all working conditionsCarbon substrate can be galvanized or painted; stainless steel and aluminum base plates feature native rust resistance, covering dry indoor, open-air rainy, marine salt spray and mild chemical corrosion working environments.
Decorative appearanceRegular three-dimensional texture can be exposed as finished decorative surface without additional anti-slip floor paving, shortening construction cycle.
6. Production Process Flow
Raw Material Preparation: Qualified hot-rolled steel slabs / stainless slabs with strictly controlled harmful impurities S & P
Integrated High-Temperature Rolling: Special patterned rolls form substrate and 3D patterns simultaneously in one pass
Cooling & Finishing: Laminar flow controlled cooling, leveling machine to eliminate rolling internal stress
Edge Trimming & Fixed-Length Cutting: Cut edge or retain as-rolled rough edge, shear to ordered length
Optional Surface Treatment: Shot blasting, pickling, hot-dip galvanizing or anti-corrosion coating spraying
Full-Item Factory Inspection: Dimension tolerance, pattern height, surface appearance and weight recheck, issuing Material Test Certificate (MTC)
Bundling, Marking & Warehousing: Grade, pattern code, dimension, standard and heat number spray-marked on plate surface
7. Full Industry Application Fields
Shipbuilding & Offshore EngineeringShip decks, cabin walkways, stair treads, anti-slip platforms of offshore jackets, outboard operation walkways (CCS certified marine checkered plate)
Industrial Manufacturing PlantsFactory staircases, operation platforms, equipment walkways, trench cover plates, anti-slip treads for heavy machinery and storage ramps
Transportation IndustryTruck / semi-trailer floor plates, passenger coach compartment floors, train carriage walkways, anti-slip container base plates, forklift ramps
Architectural & Municipal EngineeringSteel structure staircases, overhead pedestrian bridges, underground garage ramps, factory & mall public stair treads
Light Industry, Food & Chemical IndustryAnti-slip walkways of food clean workshops, operation platforms for mild chemical corrosion environments, cold storage flooring, sewage treatment plant walkways
Decorative Supporting WorksDecorative panels for equipment housings, facade decoration of steel structures, indoor anti-slip stair treads
8. Delivery & Quality Assurance
8.1 Attached Delivery Documents
Material Test Certificate (MTC) supplied for each batch, including chemical composition of base substrate and dimension tolerance inspection records. Marine-grade checkered plates are accompanied with official CCS inspection certificates; English version MTC available for export orders.
8.2 Plate Marking
Permanent clear spray marking on each plate surface: material grade, pattern code, thickness × width × length, execution standard and heat number for full traceability.
8.3 Packaging & Shipment
Bundled with steel strips and wrapped with rainproof plastic film; oversized plates fixed with support frames to avoid deformation and oxidation rust during transportation.
8.4 Customization Service
Custom extra-thick / extra-wide sizes, Z-direction performance substrate, 100% ultrasonic testing, hot-dip galvanizing, color coating and semi-finished pre-bent stair treads available on request.
9. Core Product Advantages
Mature and stable hot rolling technology eliminating pattern peeling & delamination risks, safe and reliable under long-term load
Full series coverage of patterns and materials: ordinary carbon, low-alloy, marine, stainless steel and aluminum to match diverse budgets and working conditions
Lower comprehensive project cost: less steel consumption for equal anti-slip load-bearing requirements, no extra anti-slip paving material and reduced construction labor cost
Complete anti-corrosion solutions: native rust-proof stainless & aluminum, galvanized/painted carbon steel applicable for both indoor and outdoor service
Flexible delivery: standard sizes in ready stock; customized heavy gauge, special anti-corrosion treatment and shaped blanking can be scheduled rapidly with full truck bulk shipment support
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