... -class Italian ORSOGRIL equipment .which can arrange the bearing bar and cross bar in longitude and latitude order to certain distance ... strength.2. Classification: Raised (Standard, Regular) and Flattened3. Pitch of Bearing bar: 30mm, 40mm, 60mmCross bar pitch: 50mm or 100mmSteel ... *5,6*6,8*8mm4. Bar grating is widely used in the platform, corridor, bridge, well covers, stairs.5. Ventilation, light ...