We employed a Glaserian grounded theory approach to explore the gap between behavioural safety and its unsatisfactory outcomes. Data were collected through ethnographic studies on the practice of managing heat stress on thirty-six construction sites in Hong Kong and Chonqing in mainland China. Two core concepts, institutions and institutional logics, are generated and defined to explain why safety rules do not necessarily produce safety behaviours. At society level, we explicated two pairs of institutional logics: the religion logics (Confucianism vs. pragmatism) and the market logics (rational market vs. individualism). At project organisational level, two logics of processing safety in production are explicated: a protection logic in the Chongqing context and a production logic in the Hong Kong context. The concepts and sub-concepts are compared to existing business literature for clarification of scopes. Empirical findings of the study suggest safety intervention needs to redirect its focus from promoting safety alone to addressing the institutional logics of the entire organisation and its societal context practised by multiple levels of actors. We conclude that safety research would benefit from redirecting its focus of analysis from discourses, interviews or surveys to authenticated cases reconstructed through triangulation of actors' discourses at multiple levels of an organisation, third-party observation, physiological data and objective measurement of the work environment. Methodologically, this paper provides a detailed guidance for conducting grounded theory research with a focus of conceptualisation.
Existing heat stress risk management guidelines recommended by international standards are not practical for the construction industry which needs site supervision staff to make instant managerial decisions to mitigate heat risks. The ability of the predicted heat strain (PHS) model [ISO 7933 (2004). Ergonomics of the thermal environment analytical determination and interpretation of heat stress using calculation of the predicted heat strain. Geneva: International Standard Organisation] to predict maximum allowable exposure time (D lim) has now enabled development of localized, action-triggering and threshold-based guidelines for implementation by lay frontline staff on construction sites. This article presents a protocol for development of two heat stress management tools by applying the PHS model to its full potential. One of the tools is developed to facilitate managerial decisions on an optimized work-rest regimen for paced work. The other tool is developed to enable workers' self-regulation during self-paced work.
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