Abstract
The labor cost has a high proportion of the total cost of engineering and construction projects. Hence, labor productivity has to effect on the success of any engineering and construction projects. Installation of steel reinforcement bar, among others, is the most critical task. It is often adversely affected by the outdoor environment and other factors. This paper presents the measurement of labor productivity by work sampling method for floor and beams steel reinforcement bar of high-rise buildings in Ho Chi Minh City, Vietnam. The research identifies the proportion of time consumption for effective tasks, supportive tasks, and ineffective tasks of steel reinforcement bar as follows: 31%, 34%, and 35% respectively. In other words, its labor productivity variability is shown by the change in effective work over periods. It is low at the beginning and the end and is highest at the mid-shift working session.
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