Professional Guide: Chinese Standard Steel Grating Models & Applications
As a leading manufacturer and wholesaler in the steel grating industry, BangTu understands that selecting the correct grating product is critical for any project. Steel grating is more than just an industrial material; it is a key factor impacting project safety, cost, and longevity. This guide, based on Chinese national standards, provides a clear analysis of the steel grating classification system and its application scope to help you make informed decisions.
Understanding the Chinese Standard Steel Grating Model System
Chinese steel grating production primarily adheres to the National Standards GB/T 4001.1-2007 Steel Grating and Accessories and YB/T 4001.1-2019 Steel Grating and Accessories. These standards define the classification, model designation, technical requirements, and application ranges.
Model Nomenclature Rules
The model designation for Chinese standard steel grating typically consists of the following components:
Load-Bearing Flat Steel Specification + Surface Treatment + Arrangement of Bearing Bars & Cross Bars + Material of Bearing Bars
For example, “G303/30/100F” denotes:
G: Steel Grating
303: Bearing bar width is 30mm, thickness is 3mm
30: Center-to-center spacing of bearing bars is 30mm
100: Center-to-center spacing of cross bars is 100mm
F: Plain/Flat bearing bar surface (‘S’ denotes Serrated)
Primary Model Classifications
Based on manufacturing process, Chinese steel grating is mainly categorized as follows:
1. Pressure-Welded Steel Grating
This is the most common type, where bearing bars and cross bars are joined by high-pressure resistance welding. This process creates a permanent connection with high structural strength, widely used for various industrial platforms.
2. Press-Locked Steel Grating
The bearing bars and cross bars are mechanically locked without welding. Suitable for applications with special anti-corrosion requirements or where welding might compromise material properties.
3. Interlocked Steel Grating (or Riveted Grating)
Pre-notched bearing bars have cross bars inserted into the slots before being welded. This structure is particularly aesthetically pleasing and offers high load-bearing capacity, often used in locations requiring superior appearance.
4. Composite Steel Grating
A chequered plate or steel sheet is welded over the grating, creating a sealed surface that prevents small objects from falling through. Ideal for areas requiring slip resistance or object fall-through prevention.
Application Ranges for Different Grating Models
Light-Duty Steel Grating Series
G203/30/100: Bearing bar height 20mm, thickness 3mm.
Suitable for pedestrian walkways, light-duty maintenance platforms.
Commonly used for decorative walkways in commercial spaces like malls, exhibition halls.
Key features: Light self-weight, easy installation.
G253/30/100: Bearing bar height 25mm, thickness 3mm.
Ideal for balcony walkways in office/residential buildings.
Excellent choice for pedestrian passages in parking garages.
Balances load capacity with cost-effectiveness.
Medium-Duty Steel Grating Series
G303/30/100: Bearing bar height 30mm, thickness 3mm.
The standard choice for industrial platforms and walkways.
Extensively used in power plants, chemical plants for access ways.
Offers moderate load capacity and high cost-performance ratio.
G323/30/100: Bearing bar height 32mm, thickness 3mm.
Suitable for platforms around medium-weight equipment.
Pedestrian areas in ports, docks.
Provides higher load-bearing capacity than the G303 series.
Heavy-Duty Steel Grating Series
G405/30/100: Bearing bar height 40mm, thickness 5mm.
The primary choice for heavy industrial platforms.
Applicable in automotive plants, heavy machinery factories.
Capable of withstanding loads from forklifts and other heavy equipment.
G505/30/100: Bearing bar height 50mm, thickness 5mm.
Designed for extreme load-bearing environments.
Bridge walkways, large-scale power station maintenance platforms.
Provides the highest safety factor and load capacity.
Special Application Steel Grating
Serrated Steel Grating: Features anti-slip serrated surface.
Ideal for wet, oily industrial environments.
Perfect for offshore platforms, ship decks.
Significantly enhances safety in slippery conditions.
Interlocked Steel Grating: Weld-free connection, smooth surface.
Decorative applications in high-end commercial buildings.
Public spaces with high aesthetic requirements.
Stair treads and platforms in museums, luxury hotels.
Stainless Steel Grating: Made from 304 or 316 stainless steel.
Food processing, pharmaceutical industries.
Chemical, marine, and other corrosive environments.
Locations requiring high hygiene standards or corrosion resistance.
Special Application Steel Grating
Serrated Steel Grating: Features anti-slip serrated surface.
Ideal for wet, oily industrial environments.
Perfect for offshore platforms, ship decks.
Significantly enhances safety in slippery conditions.
Interlocked Steel Grating: Weld-free connection, smooth surface.
Decorative applications in high-end commercial buildings.
Public spaces with high aesthetic requirements.
Stair treads and platforms in museums, luxury hotels.
Stainless Steel Grating: Made from 304 or 316 stainless steel.
Food processing, pharmaceutical industries.
Chemical, marine, and other corrosive environments.
Locations requiring high hygiene standards or corrosion resistance.
How to Select Steel Grating Based on Project Requirements
Serrated Steel Grating: Features anti-slip serrated surface.
Ideal for wet, oily industrial environments.
Perfect for offshore platforms, ship decks.
Significantly enhances safety in slippery conditions.
Interlocked Steel Grating: Weld-free connection, smooth surface.
Decorative applications in high-end commercial buildings.
Public spaces with high aesthetic requirements.
Stair treads and platforms in museums, luxury hotels.
Stainless Steel Grating: Made from 304 or 316 stainless steel.
Food processing, pharmaceutical industries.
Chemical, marine, and other corrosive environments.
Locations requiring high hygiene standards or corrosion resistance.
Consider Load Requirements
First, evaluate the type of load the grating must withstand:
Pedestrian traffic only: Light or Medium-duty series.
Light vehicles/equipment: Medium-duty series.
Heavy equipment/vehicles: Heavy-duty series.
For uncertain cases, select a model one grade higher than calculated to ensure a safety margin.
Consider the Operating Environment
Corrosive Environments: Chemical plants, coastal areas, wastewater treatment plants.
Recommendation: Hot-dip galvanized or stainless steel grating.
Minimum zinc coating thickness: 70µm.
High-Temperature Environments: Power stations, areas around boilers.
Avoid plastic-coated grating.
Consider high-temperature resistant paint or appropriate material grades.
Public Areas: Shopping malls, stations, stadiums.
Focus on aesthetics.
Consider interlocked grating or special surface finishes.
Consider Installation and Maintenance
Restricted Installation Conditions: Confined spaces or areas without access to large equipment.
Choose modular designs for easier manual installation.
Difficult Long-Term Maintenance: Locations hard to access for regular upkeep.
Select models with higher corrosion resistance.
Consider increased material thickness for extended service life.
Choosing the Right Surface Treatment
Surface treatment directly impacts grating lifespan and appearance:
Hot-Dip Galvanizing: The most common anti-corrosion treatment.
Provides 20-30 years of corrosion protection.
Suitable for most industrial environments.
Offers the best cost-performance ratio.
Powder Coating/Painting: Offers various color options.
Enhances aesthetic appeal.
Suitable for indoor or mildly corrosive environments.
Requires more frequent maintenance cycles.
Stainless Steel Material: Requires no additional surface treatment.
Ideal for highly corrosive or high-hygiene environments.
Higher initial investment but lower maintenance costs.
Advantages of Customized Steel Grating
As a professional manufacturer, BangTu provides comprehensive customization services:
Size Customization: Non-standard dimensions and shapes.
Avoids waste and damage to protective coatings from on-site cutting.
Ensures precise fit for the installation space.
Reduces installation time and cost.
Load Customization: Design based on specific load requirements.
Optimizes material use, avoiding over-engineering.
Ensures safety while controlling costs.
Includes professional calculations and verification.
Accessory Customization: Custom installation fittings matched to the grating.
Ensures secure and reliable installation.
Minimizes on-site fabrication work.
Provides a complete solution.
BangTu's Professional Advantages
As a leading Chinese steel grating manufacturer and exporter, BangTu offers these core strengths:
Stringent Quality Control: Rigorous inspection at every stage, from raw materials to finished products.
Compliance with Chinese National Standards and major international standards.
Provision of complete quality certificates and test reports.
Advanced Production Equipment: Fully automatic pressure welding machines, large CNC cutting equipment.
Ensures product precision and consistency.
Enhances production efficiency, shortening delivery times.
Professional Technical Team: Engineers and technicians provide full-process support.
Assist clients in selecting the most suitable product model.
Offer installation guidance and technical consultation.
Flexible Service Model: From small-batch custom orders to large-scale production.
Meets diverse needs of different clients.
Provides competitive pricing and stable supply.
How to Partner With Us
Choosing BangTu as your steel grating supplier means you gain:
A One-Stop Solution: Full-process service from consultation, design, production to shipping.
Rapid Response: Professional team replies to your inquiries within 24 hours.
Technical Support: Free product selection and design proposal advice.
Logistics Assurance: Rich export experience ensures safe and timely delivery.
Whether you are a construction contractor, engineering firm, or trader, BangTu can provide the most suitable steel grating products and professional services.
We understand that correct product selection is vital for project success. Through this guide, we hope you have gained a comprehensive understanding of Chinese standard steel grating. Every project is unique; the most economical choice is often not the cheapest, but the one best suited to your specific needs.
Contact the BangTu Professional Team today for your personalized steel grating solution!
BangTu Steel Grating Co., Ltd.
Professional Steel Grating Manufacturer & Exporter
📧 Email: james@bangtuwiremesh.com
🌐 Website: www.bangtusteelgrating.com
📞 Tel: +86-133-6318-0165
Our expert team is ready to provide you with free consultation and quotation services. Please send your project requirements and drawings to us, and we will provide a customized solution with a competitive quote within 24 hours.
Let BangTu be your trusted steel grating partner!
