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Evaluating the impacts of high-temperature outdoor working environments on construction labor productivity in China: A case study of rebar workers

机译：评估高温户外工作环境对中国建筑工人生产率的影响：以钢筋工人为例

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The purpose of this study is to provide industry practitioners with a better understanding of the impacts of high-temperature conditions on construction labor productivity. Such information could assist in the establishment of plans to prevent heat-stress injuries and help improve the safety and comfort of construction labor working environments. On-site WBGT (Wet Bulb Globe Temperature) data and labor productivity data related to direct work time, indirect work time and idle time were measured for two construction projects involving 16 rebar workers in the summer of 2014 in Beijing, China. The period from 14:00 to 15:00 was identified as the most hazardous for workers throughout the day, and the period from 07:00 to 09:00 was identified as the least hazardous time. Productivity models were further used to analyze the collected data. The model results demonstrated that high-temperature environments decrease labor productivity, with the percentage of direct work time decreasing by 0.57% and the percentage of idle time increasing by 0.74% when the WBGT increased by 1 degrees C. Moreover, the percentage of direct work time increased by 0.33% when the workers' experience increased by 1 year and decreased by 0.72% when the workers' age increased by 1 year. Overall, the results demonstrated that high-temperature environments impose heat stress on the human body and decreases labor productivity in the construction industry. (C) 2015 Elsevier Ltd. All rights reserved.
机译：这项研究的目的是为行业从业者更好地理解高温条件对建筑工人生产率的影响。这些信息可以帮助制定预防热应力伤害的计划，并有助于改善建筑工人工作环境的安全性和舒适性。 2014年夏天，在中国北京，对涉及16名钢筋工人的两个建设项目，测量了与直接工作时间，间接工作时间和闲置时间相关的现场WBGT（湿球温度）数据和劳动生产率数据。从14:00到15:00被确定为全天对工人危害最大的时期，从07:00到09:00的期间被确定为危害最小的时期。生产力模型进一步用于分析收集的数据。模型结果表明，当WBGT升高1摄氏度时，高温环境降低了劳动生产率，直接工作时间所占的百分比降低了0.57％，空闲时间所占的百分比提高了0.74％。工人的工龄增加1年，工时增加0.33％；工人的工龄增加1年，工时减少0.72％。总体而言，结果表明，高温环境对人体产生热应力，并降低了建筑行业的劳动生产率。 （C）2015 Elsevier Ltd.保留所有权利。

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