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

Table 7

Component failure of usage phase.

Component	Unsafe state
Lifting system	HUP1 defective foundation of tower crane
	HUP2 unstable integral structure of tower crane
	HUP3 nonconforming member of tower crane
	HUP4 deletion of tower crane member
	HUP5 unstable fastenings
	HUP6 tower crane over the service life
	HUP7 tower crane operating system malfunction
	HUP8 materials too large or too heavy
Monitoring system of tower crane	HUP9 lack of monitoring system
	HUP10 sensors failure
Security system of tower crane	HUP11 lack of security system
	HUP12 security device failure
Signalman/operator/rigger	HUP13 lack of staff
	HUP14 without ability or qualification
	HUP15 mental and physical distress
	HUP16 weak safety concept
	HUP17 failure to wear protective equipment as required