What is the standard thickness of steel for heavy-duty shelving?

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Publish Time:

2025-07-18

The thickness standard for heavy-duty rack steel is not fixed and unified, but dynamically adjusted according to load-bearing requirements, usage scenarios, and material types.
The following is a detailed analysis based on information from multiple sources:

 

Relationship between Material and Thickness

- Q235B Steel Plate
- Conventional heavy-duty racking: The column thickness is usually 2.5-3.0mm, and the beam thickness is 1.5-2.0mm (one-piece square tube) or 3.0mm (welded beam), suitable for single-layer load-bearing scenarios of 1-3 tons.
- Super heavy-duty racking: Requires a column thickness ≥4.0mm, and Q345B material, to meet the needs of single-layer load-bearing of 3-5 tons.

- Q345B Steel Plate
- Suitable for high-bay warehousing or scenarios with high impact loads (such as automotive parts warehouses). The thickness standard is similar to Q235B, but with higher strength, reducing the column cross-sectional area.

- Cold-rolled steel plate
- Higher thickness accuracy (±0.05mm), commonly used thickness is 1.5-2.5mm, suitable for high-precision racking (such as mold racking).
- Cold-rolling process improves surface hardness and corrosion resistance, but the cost is higher, and rust prevention treatment (such as galvanizing or spraying) is needed.

Other Influencing Factors

- Welding process: Gas shielded welding or arc welding can ensure connection strength, and heat treatment is required after welding to improve durability.

- Surface treatment: Galvanizing, spraying, or sandblasting anti-corrosion treatment can extend the service life of the rack, especially in high-humidity environments.

 

The steel thickness of heavy-duty racking needs to be comprehensively selected based on the actual load-bearing capacity, usage environment, and cost. It is recommended to cooperate with professional manufacturers for design to ensure safety and cost-effectiveness.

 

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