Two sides of gratings are welded on with H*6 mm flat steel.
Welding slag is required to be cleaned.
Features:
Attractive appearance: Simple lines, silver surface and modern conception.
Optimized Draining Design: Water draining area amounts up to 83.3%, which is equal to twice of the cast iron product.
Hot-dip Galvanization for Trench Steel Grates: Strongly rust-proof, need no maintenance and replacement within 30 years.
Anti-theft Design: The draining cover and the fram are connected with chain