crane installations working for authorities (see Table 3). The aim of
the FGIs was to review and interpret accident analysis and to elaborate
upon and discuss factors that affect the safety of tower crane
installation/dismantling. The FGIs were based on the results
obtained from the questionnaire.
The accident cases related to the installation/dismantling of
tower cranes were shown to the participants, followed by discussion
of what went wrong and why. The participants were asked
to write down factors that had contributed to the accidents and
were then asked to identify factors affecting the safety of tower
crane installation/dismantling. Semi-structured questions were
used for exploring these factors (Appendix). The contributing factors
indicated by the responses of the participants were reviewed
and arranged. Finally, all the participants discussed the influencing
factors and the ways to improve the safety of tower crane operation.
The factors were grouped based on the FGIs. Fig. 2 shows
the complete process and methodologies adopted to conduct this
research.