Research Article

System Hazard Analysis of Tower Crane in Different Phases on Construction Site

Table 5

Unsafe control action behaviors in the installation phase (STPA).

InteractionsAction required but not providedUnsafe action providedIncorrect timing/orderTerminated too soon/applied too long

C1. Archives managementHIP14 scheme has not been inspectedHIP15 wrong scheme has been providedHIP16 scheme inspection has not been conducted before installation

C2. Operational commandHIP17 manager has not provided operational commandHIP18 manager command errorHIP19 operational command delayHIP20 command behavior last too long

C3. Technical disclosureHIP21 worker has not participated in the technical disclosureHIP22 incorrect technical disclosureHIP23 technical disclosure has not been conducted before installation

C4. OperatingHIP24 necessary operations have not been conductedHIP25 missing operationHIP26 sequence of operations errorHIP27 operations last too long

C5. SuperviseHIP28 supervisors have not observed the behavior of the workersHIP29 supervisor has not stopped the unsafe behavior of the workersHIP30 cessation of the unsafe behavior was too lateHIP31 supervisor has not supervised the whole process

F1. Provide schemeHIP32 manager has not participated in the technical disclosureHIP22 incorrect technical disclosureHIP23 technical disclosure has not been conducted before installation

F2. FeedbackHIP33 workers have not reported to the managerHIP34 workers have misreportedHIP35 workers have reported too late

F3. Status and process informationHIP36 workers have not observed the status of the tower craneHIP37 workers have misjudged the status of the tower crane

F4. Provide schemeHIP38 supervisor has not participated in the technical disclosureHIP22 incorrect technical disclosureHIP23 technical disclosure has not been conducted before installation

F5. ObservationHIP39 supervisor has not observed the status of the tower craneHIP40 supervisor has misjudged the status of the tower craneHIP31 supervisor has not supervised the whole process

F6. ObservationHIP41 manager has not observed the status of tower craneHIP42 manager has misjudged the status of tower crane

F7. Feedback informationHIP43 supervisor has not reported information to the managerHIP44 supervisor provided wrong information to managerHIP45 supervisor provided feedback too late