Under normal circumstances, as long as safety procedures are followed, no accidents will occur. At present, the design of elevators has complete protection for both users and maintenance personnel. There are specific requirements for dangerous operations. Illegal operations are only individual accidental phenomena. Besides, there are many elevator parts in the pit. Net-mounted high-point elevators It cannot reach the bottom layer and is installed too low to have any protective effect. More importantly, there are moving parts such as compensation chains, so there is no need to install a protective net in the pit.