Risk Assessment and Improvement of Working Conditions in the Water Tower Construction Process in Nakhon Ratchasima Province

Abstract

The purposes of this Quasi-experimental research were: 1) to identify hazard 2) to do risk assessment 3) to improve in the water tower construction process and; 4) to assess satisfaction before and after to improve of in the water tower construction process. Job Safety Analysis form (JSA), Checklist form and assessment of satisfaction before and after to improvement form were used as a fundamental tool.  This research covers five processes included: 1) steel plate cutting, 2) steel sheet coil 3), manhole Drilling, 4) assembly of water tower parts and, and 5) painting the water tower. The risk levels were analyzed using the criteria from the Department of Industrial Works (Thailand). Results showed that the hazard within the level 3 of risk was referred to the high risk (87.5%) while the hazard within the level 4 of risk was the unacceptable risk (12.5%) that must be reduced and improve conditions. When working conditions were improved, the risk is reduced to the level 2 (100%) giving an acceptable risk. Assessment of worker’s satisfaction before and after the improvement of in the water tower construction process provided the excellent results—levels of worker’ satisfaction was increased in all aspects. It can be concluded that the improvement of working conditions in the water tower construction process can reduce risk, therefore more safety in the workplace.