3.2.1. Damage comparison across three stages
Three damage value indicators of construction stages are summarized
in Table 11. Note that workers engaged in the superstructure
construction stage experience the greatest harm from the
perspective of all three indicators. The total health damage due to
superstructure construction activities represents the largest proportion
(94%), with a value of 314,000 USD, far beyond that of
earthwork (1320 USD) and ventilation and air condition engineering
(19300 USD). The same situation is found for per capita health
damage (72%). This is because the long construction period characteristic
of the superstructure construction stage results in health
damage accumulating day by day into a serious issue. From the
perspective of TDV, the health damage suffered by workers during
the earthwork stage can be ignored. Focusing on PCDDV, a worker
at this construction stage suffers a damage value of 4.8 USD every
day, more than 3.24 USD every day in the ventilation and air condition
engineering stage and accounting for 32% of the total damage
value.