Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/75922
Title: Effects of heat stress on construction labor productivity in Hong Kong : a case study of rebar workers
Authors: Yi, W
Chan, APC 
Keywords: Heat stress
Construction labor productivity
Steel bar fixing
Issue Date: 2017
Publisher: Molecular Diversity Preservation International (MDPI)
Source: International journal of environmental research and public health, 2017, v. 14, no. 9, 1055 How to cite?
Journal: International journal of environmental research and public health 
Abstract: Global warming is bringing more frequent and severe heat waves, and the result will be serious for vulnerable populations such as construction workers. Excessive heat stress has profound effects on physiological responses, which cause occupational injuries, fatalities and low productivity. Construction workers are particularly affected by heat stress, because of the body heat production caused by physically demanding tasks, and hot and humid working conditions. Field studies were conducted between August and September 2016 at two construction training grounds in Hong Kong. Onsite wet-bulb globe temperature (WBGT), workers' heart rate (HR), and labor productivity were measured and monitored. Based on the 378 data sets of synchronized environmental, physiological, construction labor productivity (CLP), and personal variables, a CLP-heat stress model was established. It was found that WBGT, percentage of maximum HR, age, work duration, and alcohol drinking habits were determining factors for predicting the CLP (adjusted R-2 = 0.68, p < 0.05). The model revealed that heat stress reduces CLP, with the percentage of direct work time decreasing by 0.33% when the WBGT increased by 1 degrees C. The findings in this study extend the existing practice notes by providing scientific data that may be of benefit to the industry in producing solid guidelines for working in hot weather.
URI: http://hdl.handle.net/10397/75922
ISSN: 1660-4601
EISSN: 1660-4601
DOI: 10.3390/ijerph14091055
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