Before the demolition, should be divided work area, located around the wire for fences or warning signs erected, the ground should direct the designated persons, prohibit non-operating personnel.
Before demolition, the operating area shall be divided, the surrounding rope tied fence or the erection of warning signs, the ground should be set up under special command, non-operational personnel are prohibited from entering.
Before demolition, the operation area shall be divided, and ropes and fences shall be set around or warning signs shall be erected. The ground shall be commanded by specially assigned personnel, and non operating personnel are prohibited to enter.