... it has a high load, the structure of light, easy lifting; shape beautiful, durable, hot-dip zinc surface treatment so that ... cleaning, easy to maintain3.Usage of steel bar grating: widely used in petroleum chemical industry, power plants, water plants, sewage ... 30/100, 40/50, 60/100 and allGrating Application:steel platform, flooring and walkway, trench cover, stair tread contact personMichelle Gao ...