... manufacturer) a.Cross bar: round or SQ.twisted b.Top: Plain or serated c.4000 square meter/week Heavy duty welded steel gratingFlooring galvanized ... ,41,60mm. US standard: 1"x3/16", 1 1/4"x3/16", 1 1/2"x3/16", 1"x 1 ... /4", 1 1/4"x 1/4", 1 1/2"x 1/4" etc.3Cross bar pitch38,50,76,100, ... Quality is our Mission 3. High Efficiency is our Goal 4. Pursue Constant Innovation is our Task Steel grating is ...