Louver Grating

Louver grating is a metal grating system designed with angled louver bars fixed between vertical bearing bars by pressing or welding. The inclined bar arrangement helps block direct sightlines from selected viewing angles while still allowing air, light and heat to pass through the panel.

Compared with standard bar grating, where cross bars are usually arranged at right angles to the bearing bars, louver grating uses an angled structure to provide better visual screening and design flexibility. The louver angle can generally be customized from 10° to 50° in 5° increments, with common options such as 30° and 45°. This makes it suitable for projects that require privacy protection, ventilation performance and a clean architectural appearance.

Specifications

• Material: Low-carbon steel Q235, stainless steel 304 / 316 / 316L, aluminum
• Surface Treatment
  • Hot-dip galvanized: To BS EN ISO 1461, for carbon steel corrosion protection
  • Polyester powder coated: To BS EN 13438:2005, for architectural colorfinishes
  • Electro-plated zinc: To BS EN 2081:2008
  • Anodized: To BS EN 7599:2010, for aluminum only
  • Electro-polished: To BS EN 15730:2000, for stainless steel only
• Press-Locked Louver Grating Parameters
  • Bearing bar height: 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm
  • Bearing bar thickness: 2 mm, 3 mm
• Louvre Angle Range
  • Standard angles: 30° or 45°
  • Custom range: 10°–50° in 5° increments
  • Angle note: The effective louver angle depends on the relationship between bearing bar height and cross bar spacing. Taller bearing bars with closer cross bar spacing create steeper angles.

  Table 1: Standard Mesh Size

  Bearing Bar Spacing (mm)	Cross Bar Spacing (mm)
  33	33, 66, 99
  66	33, 66
  99	33

• Packaging: Cartons or simple wrapping paper

Different types

General louver grating

Integrally-molded louver grating

Standards

• CN: YB/T 4001
• UK: BS 4592
• US: ANSI/NAAMM (MBG 531-88)
• Australia: AS 1657

Features

• High strength, wear resistance.
• Sunshade, ventilation, anti-dust, anti-slip, anti-theft, anti-corrosion, anti-oxidation.
• Not easy to fade in the sun.
• Modern style, beautiful and generous.
• Easy to clean and maintain.
• Long lifespan.

Applications

• Sun visor.
• Building facade.
• Control the lighting inside the house from outside.
• Walkaway.
• Protect the air conditioning.
• Fence.

• Partition.
• The railing of stairs and steps.
• The transition between stairs or floors.
• Ventilation.

Louver grating building facade

Louver grating blocks sunlight

Louver grating fence