Steel Grating Selection Guide
Feb 03, 2026| Steel grating is a common industrial material widely used in wastewater treatment, stair treads, trench covers, and other fields. Here are some aspects to consider when purchasing steel grating:
Shape Classification: Steel grating can be classified into two types based on shape: flat and curved. Flat grating consists of bars and a frame, while curved grating is further divided into fixed curved and rotating drum types.
Bar Spacing: Steel grating can be classified into three types based on the net spacing of the bars: coarse, medium, and fine. Newly designed wastewater treatment plants generally use two layers of coarse and medium grating, or even three layers.
Cleanup Method: Steel grating can be classified into manual and mechanical cleanup methods. Manual cleanup is suitable for small wastewater treatment plants, while mechanical cleanup grating is recommended when the amount of slag exceeds 0.2 m³/d.
Load Capacity and Span: When purchasing steel grating, it is essential to understand its load capacity and the span of the equipment, and select the appropriate type from the manufacturer according to the "Safety Load, Span, and Deflection Contact Table."
Appearance Quality: Select steel gratings with a smooth appearance, small weld gaps, high precision, and robust construction to ensure their service life and safety.
Environmental Factors: Humidity, corrosion, and temperature significantly impact the service life of steel gratings. Before purchasing, it is essential to carefully understand the intended application and corrosion resistance of the steel grating.
Flat Bar Direction: The direction of the flat bars is crucial for stair treads, trench covers, or platforms. Steel gratings of the same size can have significantly different weights depending on the direction of the flat bars.
Deformation Deflection: The deformation deflection should not exceed 1/200 of its span, nor should it exceed 6mm, to ensure the stability and safety of the steel grating.
Zinc Plating: Galvanizing the surface of platform steel gratings extends their service life, prevents rust, and enhances their aesthetics. Galvanizing not only increases the durability of the steel grating but also improves its corrosion resistance.