Steel Bar Grating – Specifications, Sizes 20–75 mm, Welded, Press-Locked & Swaged

Steel bar grating is an open-grid flooring and structural support material made by welding or press-locking bearing bars and cross bars at right angles. It provides high load-bearing capacity, durability, and slip resistance, making it suitable for industrial floors, platforms, catwalks, trench covers, stair treads, and drainage grates. Manufactured from carbon steel or stainless steel, it complies with standards like ANSI/NAAMM MBG 531, BS EN ISO, and DIN 24537. Gratings are available in plain or serrated surfaces with black, painted, or hot-dip galvanized coatings for corrosion resistance.

Specifications

• Material: Mild carbon steel, stainless steel (304/316)
• Surface Options: Plain, serrated (anti-slip)
• Finishes: Black (untreated), painted, hot-dip galvanized per ASTM A123
• Load Types: Welded grating, press-locked grating, swaged grating
• Standard Compliance: ANSI/NAAMM, BS, DIN

Dimensions

• Bearing Bar Width: 20–75 mm
• Bearing Bar Thickness: 3–10 mm
• Bearing Bar Spacing (center-to-center): 25, 30, 34, 38, or 40 mm
• Cross Bar Spacing: 50–100 mm
• Panel Width: 0.5–1.5 m
• Panel Length: 1–6 m (custom lengths available)
• Load Capacity: Designed according to span and load requirements

Welded Steel Bar Grating | 20–75 mm Bars, Galvanized or Serrated

Welded steel bar grating is produced by resistance welding bearing bars and cross bars into a durable, one-piece grid. It provides excellent load-bearing performance for industrial floors, trench covers, catwalks, stair treads, and platforms.

• Bearing Bar Width: 20–75 mm
• Bearing Bar Thickness: 3–10 mm
• Bar Spacing: 25–40 mm (center-to-center)
• Panel Length: 1–6 m
• Surface Type: Plain or serrated
• Finishes:Available in black (untreated), painted, or hot-dip galvanized finishes for enhanced durability and corrosion resistance.

Press-Locked Steel Bar Grating | 20–75 mm Architectural Panels

Press-locked bar grating is made by mechanically interlocking bearing bars and cross bars at precise slots. It offers a uniform appearance suitable for architectural projects and public facilities.

• Bearing Bar Width: 20–75 mm
• Bearing Bar Thickness: 3–8 mm
• Bar Spacing: 30–40 mm
• Panel Width: 0.5–1.5 m
• Panel Length: 1–6 m
• Surface Type: Plain or serrated
• Finishes：Available in galvanized or stainless steel for improved corrosion resistance and aesthetic appeal.

Swaged (Aluminum/Steel) Bar Grating

Swaged bar grating is created by locking cross rods into pre-punched bearing bars, providing lightweight, slip-resistant panels used in offshore platforms and marine environments.

• Bearing Bar Width: 25–50 mm
• Bearing Bar Thickness: 3–6 mm
• Bar Spacing: 30–40 mm
• Panel Length: Up to 6 m
• Surface Type: Anti-slip serrated available
• Finishes: Offered in aluminum or steel with anodized or hot-dip galvanized coatings for maximum corrosion protection.