Steel Grating Classification Guide | Types of Steel Grid Plates & Applications

Steel grating represents a versatile category of open steel members composed of bearing flat steel and cross bars arranged in precise spacing and secured through welding or pressure locking. These structural components are manufactured from various materials including carbon steel and stainless steel, offering different strength, corrosion resistance, and application characteristics. With multiple classification systems based on bar shape, surface treatment, usage, and welding methods, steel grating provides tailored solutions for industrial, commercial, and residential applications.

Comprehensive Classification System

By Bearing Bar Shape

• Flat Steel Grid Plate: Standard profile for general applications

• Tooth Flat Steel Grid Plate: Serrated surface for enhanced slip resistance

• I-Flat Steel Grid Plate: I-beam configuration for maximum load capacity

By Cross Bar Type

• Twisted Square Steel Bar: Maximum interlocking strength

• Round Steel Bar: Standard economical option

• Flat Steel Bar: Low-profile aesthetic appearance

By Surface Treatment

• Hot-Dip Galvanized Steel Grid: Superior corrosion and impact resistance

• Cold Galvanized Steel Grid: Cost-effective with moderate rust prevention

• Spray Painted Steel Grid: Color customization with basic protection

By Application Purpose

• Platform Steel Grid Plate: Industrial flooring and walkways

• Ditch Cover Plate Steel Grid: Drainage and trench protection systems

• Stair Step Plate Steel Grid: Safety treads and access ladders

By Welding Method

• Pressure Welding Type: Automated high-strength fabrication

• Insert Type: Mechanical interlocking system

• Lock Type: Secure fastening without welding

• Weld Type: Traditional welded construction

Technical Specifications

Materials & Standards

• Primary Materials: Q235, A36, SS304, SS316L, S235JR

• Material Diversity: Low carbon steel, Stainless steel options

• International Standards:

  • China: YB/T 4001.1-2007

  • USA: ANSI/NAAMM (MBG531-88)

  • UK: BS4592-1987

  • Australia: AS1657-1985

  • Japan: JJS

Dimensional Specifications

• Bearing Bar Sizes: 25×3mm to 75×10mm range

• Bearing Bar Pitch: 12.5mm to 60mm spacing

• Cross Bar Pitch: 38mm to 101.6mm intervals

• Standard Spacing: 30mm/40mm bearing bars, 50mm/100mm cross bars

Manufacturing Excellence

Production Technology

• 200-ton hydraulic resistance welding equipment

• Automated pressure welding for consistent quality

• Precision cutting and opening processes

• Custom fabrication capabilities

Quality Materials

• Raw Materials: Flat steel, twist steel, pattern plate

• Cross Bar Options: Round, twisted, or bar-shaped configurations

• Surface Treatments: Hot-dipped galvanized per ASTM A123, GB/T13912, BS729

Global Market Distribution

• Americas: 45% market presence

• Europe: 26% distribution network

• Middle East: 38% market coverage

• Other Regions: 27% global reach

Performance Characteristics

Material Advantages

• Carbon Steel Grating: Economic solution with good strength

• Stainless Steel Grating: Superior corrosion resistance for harsh environments

• Galvanized Options: Balanced cost and protection levels

Application Benefits

• Structural Integrity: Maintains strength under load

• Safety Compliance: Meets international standards

• Customization: Adaptable to specific requirements

• Durability: Long service life with proper selection

Selection Guidance

For Corrosive Environments

• Recommended: Hot-dip galvanized or stainless steel

• Applications: Chemical plants, marine facilities, water treatment

For High-Load Requirements

• Recommended: I-bar type with thicker bearing bars

• Applications: Industrial platforms, vehicle traffic areas

For Budget-Conscious Projects

• Recommended: Cold galvanized or painted carbon steel

• Applications: Light commercial, residential use

Contact us for steel grating solutions - Our technical team provides expert guidance for product selection, offering comprehensive grating options that meet your specific application requirements and performance standards.