19W2 Steel Grating Specifications (US & China Standard)
19W2 steel grating is a welded bar grating specification commonly used in industrial flooring and platform systems. It provides balanced load strength with closer cross bar spacing for improved lateral rigidity.
As a professional Steel Grating manufacturer, we manufacture 19W2 steel grating according to ASTM standards and equivalent Chinese GB/YB specifications for international engineering projects.
1. What Does 19W2 Mean? (ASTM Standard Explanation)
Under North American grating designation format:
- 19 = 19/16 inch bearing bar spacing (≈ 30.16 mm center-to-center)
- W = Welded construction type
- 2 = 2 inch cross bar spacing (≈ 50.8 mm)
Compared with 19W4, the 19W2 specification features tighter cross bar spacing, increasing panel stiffness and reducing deflection under load.
2. China Standard Equivalent (中国标准对应规格)
According to Chinese standard YB/T 4001.1, 19W2 typically corresponds to:
- Bearing bar spacing: 30 mm
- Cross bar spacing: 50 mm
- Common model reference: G303/30/50
- Material grade: Q235 carbon steel
- Galvanizing standard: GB/T 13912
Although ASTM uses inch-based spacing and Chinese standards use metric dimensions, structural performance remains functionally equivalent for engineering use.
3. Technical Specifications
- Common bearing bar heights: 25 mm, 30 mm, 32 mm, 40 mm
- Common thickness: 3 mm, 5 mm
- High rigidity due to reduced cross bar spacing
- Optional serrated surface for anti-slip safety
For higher load requirements, Heavy Duty Steel Grating can be configured with increased bearing bar thickness.
4. Surface Treatment Options
Hot-dip Galvanized Steel Grating is the most common finish for corrosion resistance in outdoor or industrial environments.
Painted or stainless steel options are also available for specific chemical or marine exposure conditions.
5. Typical Applications
- Industrial platforms
- Trench and drainage covers
- Factory walkways
- Equipment access flooring
- Wastewater treatment facilities
Conclusion
19W2 steel grating offers an optimized balance between load capacity and lateral stability. Providing both ASTM and Chinese standard equivalents ensures accurate specification for global projects.
Contact us for detailed load tables, weight calculations, and custom fabrication services.
