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The heat stress of workers at construction sites in Chongqing, China, was studied in this paper. The investigation included measurement of environmental parameters, measurement of physiological parameters, questionnaire survey and tracking record of their self-regulation of the behaviour. Scaffolder, carpenter, porter, plasterer and handymen were taken as the main research subjects. Five subjects were selected daily to conduct a questionnaire survey and to measure their physiological parameters, 60 construction workers were investigated. The results show that in sizzling summer, the average effective Wet Bulb Globe Temperature (WBGTeff) is 35.8 ° C. Under these circumstances, workers are in a poor working environment based on some Chinese and international standards. During the experiment, the researchers recorded the work behaviour and self-regulation of workers. It is found that the average heart rate of workers with different job is significantly different, and the average metabolic rate of handymen is significantly lower than that of piling rig workers. Different type of workers should be protected by different protection rules to avoid suffering heat injury.

Investigation on heat stress of construction workers in summer in Chongqing, China