An Analysis of Relationship between Working Height and Productivity of Masonry Workers on Site.

Abstract

Analysed the relationship between working height and productivity of masonry workers on construction sites by investigating two project sites. Data were also gathered by observing work activity on site. Time study form was designed to record the various elements of the task performed and the time taken to complete each element over a period of observation at both floor levels for a period of six working days. A total of thirty structured questionnaires were administered on the factors affecting workers' productivity on the construction sites. T-test was used to determine the difference between productivity at different levels. The research concluded that the factors affecting\workers productivity are: Availability of materials, Weather, Gang size, Enabling environment, Height of work have a strongly significant effect on the productivity of workers output on construction sites. A none statistically significant difference existed between the output of block laying at both floor levels but a statistically significant difference existed between the output of concrete work at first suspended floor slab and second suspended floor slab. It was also concluded that the output determined for Block laying was 12m2/day, Concrete work 19m3 /day and16m3 /day at 1st suspended and 2nd suspended floors respectively. It was recommended that the result of this research should be used to provide information upon which planning, scheduling and cost control of block laying, plastering and concrete works can be carried out.