... of 50,000tons. Jiulong grating has exported to more than 30 countries. Choose Jiulong grating is your right decision! Standard descriptions ... ,.....75x10mm2Bear bar pitch12.5, 15, 20, 23.85, 25, 30, 30.16, 30.3, 34.3, 35, 40,41,60mm. US standard: 1"x3 ...