Description of Manufacturing

The grating with inserted and fixed vertically by twin flat bar is made of CNS2473 steel. Welding slag will be removed to make grating clean and smooth. After the steel grating is formed, the hot dip galvanization is applied as surface treatment process. The thickness of the galvanization is equal to or greater than 610g/m². The fixed latch bolts and seal plates are used for anti-theft purpose. Certificate of Manufacturing and Certificate of Guarantee should to be submitted by subcontractor before starting construction.