... 30, 40, 60mm are recommended, America standard is available.3) Cross Bar Pitch (center to center):38, 50, 76, 100, 101.6mm ... , and non-slip * Easy to install and demolitionApplication:Bearing bar spacing: 30mm with best impact resistance, it find most widely use as ... , sewage works, chemical plant, high way, and airport The ones with serrated surface is an ideal product in wet and greasy ...