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Technical Document: Steel Gratings & Ball-Joint Handrails

2026,10,26
1. Steel Gratings

Materials‌: Q235/Q355 carbon steel, 304/316 stainless steel, aluminum alloy, complying with ASTM A36, EN 2014 and GB/T 40011-2021 standards .

Bearing Bars‌: Standard sizes range from 20×3mm to 100×10mm, with plain, serrated anti-slip and I-bar styles available. Common pitches are 30mm, 40mm and 60mm .

Cross Bars‌: 5×5mm to 10×10mm twisted/round bars, with standard pitches of 50mm and 100mm .

Surface Treatment‌: Hot-dip galvanizing (zinc layer ≥65μm for general use, ≥85μm for heavy corrosion environments), spray painting or stainless steel polishing .

StainlessSteel-Grating
 

Typical Models & Load Performance

 

Model

Bearing Bar Spec

Uniform Allowable Load

G253/30/100

25×3mm

≥2.5kN/㎡

G325/30/100

32×5mm

≥5kN/㎡

G405/50/100

40×5mm

≥10kN/㎡

 

Main Application Scenarios

Industrial operation platforms, maintenance walkways in power plants, chemical plants and shipyards .

Trench covers, drainage grates for municipal roads, sewage treatment zones .

Anti-slip stair treads for factories, warehouses and public venues .

Ventilated ceiling panels for airports, stations and large stadiums
Stainless-Steel-Sidewalk-Drainage-Drain-Cover-Grating
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2. Ball-Joint Handrails

Materials‌: Q235/Q345 carbon steel, 304/316 stainless steel, all hot-dip galvanized for anti-corrosion.

Standard Sizes‌: Post heights of 900mm (light-duty), 1050mm (medium-duty), 1200mm (heavy-duty); post wall thickness ranges from 1.5mm to 3.0mm.

Structure‌: 2-3 horizontal round bars (φ6mm to φ10mm) connected with spherical knobs, no sharp edges to avoid scratches.

Main Application Scenarios

Safety perimeter protection for industrial platforms in petrochemical, sewage treatment and mining industries, with 50+ years of anti-corrosion life in harsh environments.

Guardrails for municipal walkways, overpasses and stair sides, providing smooth, collision-safe protection for pedestrians.

Supporting safety facilities for port terminals, heavy equipment yards, resisting strong impact from heavy vehicles and cargo handling.

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3. Combined Application System

Steel gratings serve as the load-bearing walking surface, while ball-joint handrails form the surrounding protective barrier. Both adopt unified hot-dip galvanizing treatment, with matching anti-corrosion lifespan. They are widely used as a standard integrated solution for industrial platforms, trestle bridges and heavy-duty operation zones, balancing high load capacity, excellent drainage, ventilation and long-term safety performance.

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4. Full-Spectrum Application Scenarios

These scenarios impose the highest requirements on load-bearing capacity, corrosion resistance and safety protection, representing the most critical application fields for the two products:

‌Energy & Power Industry‌: Boiler operation platforms in power plants, maintenance walkways in photovoltaic power stations, and high-altitude tower platforms in substations. Steel gratings meet the load-bearing and light-transmission requirements for a 25+ year design life, while ball-joint handrails are installed along platform edges to prevent personnel from falling from heights.

‌Chemical & Environmental Protection Industry‌: Operation platforms and trestle bridges in chemical plants, petrochemical enterprises and sewage treatment plants. Both components adopt unified hot-dip galvanizing treatment, which can resist acid and alkali corrosion for a long time. The hollow structure can quickly drain waste liquid and reduce the accumulation of harmful gases, lowering safety risks.

‌Heavy Industry & Shipbuilding Industry‌: Heavy-duty operation platforms in shipyards, metallurgical plants and coal mines. Heavy-duty steel gratings can withstand the large-tonnage loads of forklifts and heavy equipment, while thickened ball-joint handrails have strong impact resistance and are not easily deformed or loosened after long-term use.

Port & Terminal Scenarios‌: Loading and unloading operation platforms at ports. The hollow design of steel gratings can quickly drain water and sand to avoid slipping caused by water and sand accumulation in rain and snow weather. Ball-joint handrails resist salt spray corrosion from sea wind and adapt to the high-humidity and high-salt coastal environment.

 

 

 

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Author:

Ms. Karis

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