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People on construction scaffoldings work in
dynamically changing, often unfavourable climate. Additionally, this
kind of work is performed on low stiffness structures at high altitude,
which increases the risk of accidents. It is therefore desirable to
define the parameters of the work environment that contribute to
increasing the construction worker occupational safety level. The aim
of this article is to present how changes in microclimate parameters
on scaffolding can impact the development of dangerous situations
and accidents. For this purpose, indicators based on the human
thermal balance were used. However, use of this model under
construction conditions is often burdened by significant errors or
even impossible to implement due to the lack of precise data. Thus, in
the target model, the modified parameter was used – apparent
environmental temperature. Apparent temperature in the proposed
Scaffold Use Risk Assessment Model has been a perceived outdoor
temperature, caused by the combined effects of air temperature,
radiative temperature, relative humidity and wind speed (wind chill
index, heat index). In the paper, correlations between component
factors and apparent temperature for facade scaffolding with a width
of 24.5 m and a height of 42.3 m, located at south-west side of
building are presented. The distribution of factors on the scaffolding
has been used to evaluate fitting of the microclimate model. The
results of the studies indicate that observed ranges of apparent
temperature on the scaffolds frequently results in a worker’s inability
to adapt. This leads to reduced concentration and increased fatigue,
adversely affects health, and consequently increases the risk of
dangerous situations and accidental injuries.
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