Steel Bar Grating, also known as Welded Steel Bar Grate is extremely strong and durable for all  load bearing applications and is primarily used for pedestrian and light vehicle traffic. Steel bar  grating is available in a variety of bearing bar spacing and thicknesses depending on applications  and load requirements. Available in either smooth top or serrated for slip resistance.  1. What is the application of steel grating? The main usage can be divided to 4 kinds: platform, flooring, stair treads and drainage cover. See the pics for reference. 2. what is the quantity of galvanization? And how long will it last? We do our galvanization as American standard, for over 5mm thick steel grating, it is no less than 610g/M2, for less than 5 mm thick steel grating, it is no less than 460g/M2, usually it is 60-80μ/M2. And it can last at least 50 years.