... flooring grating 1. ISO 2. Type: Plain,Serrated,I-BAR 3. Surface:HDGalvanizing,blac walkway gratinggalvanized walkway gratingMain Market85% of steel ... plant and so on.Grating Description:1) Bearing bar specification: 20 x 3 to 100 x 62).Bearing bar pitches maybe12.5 ... ,50,60,80mm,of which 30 and 40mm are recommended.3).Corss bar pitch maybe 38-200mm,of which 50 and ...