30W2 Steel Grating Specifications (US & China Standard)

30W2 steel grating is a narrow cross bar spacing welded grating specification commonly used for applications requiring tighter cross bar distribution and enhanced surface stability. It is widely applied in industrial platforms, trench covers, and equipment flooring systems.

As an experienced Steel Grating manufacturer, we produce 30W2 grating according to ASTM standards and corresponding Chinese GB/YB specifications to support global engineering projects.

1. What Does 30W2 Mean? (ASTM Explanation)

Steel Bar Grating with the 30W2 designation follows the North American standard format:

• 30 = 30/16 inch bearing bar spacing (≈ 47.6 mm center-to-center)
• W = Welded construction type
• 2 = 2 inch cross bar spacing (≈ 50 mm)

Compared to 19W4 or 15W4, 30W2 provides wider bearing bar spacing but significantly tighter cross bar spacing, increasing lateral stability and panel rigidity.

2. China Standard Equivalent (中国标准对应规格)

Under Chinese standards such as YB/T 4001.1, 30W2 typically corresponds to:

• Bearing bar spacing: 50 mm
• Cross bar spacing: 50 mm
• Common model reference: G305/50/50 or similar
• Material grade: Q235 carbon steel
• Galvanizing standard: GB/T 13912

Although slight dimensional differences may exist between ASTM and Chinese systems, the structural performance and load behavior remain functionally equivalent.

3. Technical Characteristics

• Common bearing bar heights: 30 mm, 32 mm, 40 mm
• Common thickness: 3 mm, 5 mm
• Improved cross bar density for enhanced panel rigidity
• Optional serrated surface for anti-slip performance

For higher load applications, Heavy Duty Steel Grating configurations are available with thicker bearing bars.

4. Surface Treatment Options

For outdoor and industrial exposure, Galvanized Steel Grating is most commonly specified. Hot-dip galvanizing enhances corrosion resistance and extends service life.

Stainless steel versions are also available for chemical plants, marine environments, and wastewater treatment facilities.

5. Typical Applications

• Industrial platforms
• Drainage trench covers
• Equipment access flooring
• Processing plants
• Infrastructure projects

Conclusion

30W2 steel grating provides balanced load distribution and improved cross bar rigidity. Understanding both ASTM and Chinese standard equivalents ensures accurate specification for international projects.

Contact our engineering team for detailed load tables, weight calculations, and customized fabrication support.