What’re the safety facilities operating requirements of overhead crane?
Assembly and maintenance of overhead crane can only be done by trained and authorized personnel, they 
must read and understand the instruction manual and follow the safety rules；
It is prohibited to set any safety switches or alarming devices without prior written approval of ZZHZ；
It is prohibited to modify, move or damage safety device, a regular check shall be done to ensure its performance；
Once there has a danger, stop the equipment through emergency stop button, before re-starting the equipment, please confirm the danger is removed；
It is not allowed to lock parts such as emergency exit or emergency access；
Emergency equipment must be prepared in the worksite；
Entrance guard switch and emergency stop switch are safety devices: they can not be used for normal stop.
