Productivity Analysis of Construction Formwork in Residential Buildings
Date Issued
2007
Date
2007
Author(s)
Chang,, Hung-Chan
DOI
zh-TW
Abstract
Abstract
The construction industry in Taiwan always use the indirect employment pattern to hire the construction technicians, instead out sourcing operation has been used for framework engineering work, through the competition of several professional subcontractors regarding to cost, quality and efficiency, the winning subcontractor is decided. During recent years, due to the aging and reduction in the number of labors in framework engineering, and the reduction in the number of new labors; the price of framework engineering is completely controlled by such factors as progress requirement, quality and supply and demand of the market by the sub- contractor; therefore. The productivity analysis can not precisely reflect the cost, and the construction professionals can not control the price of framework engineering. According to the investigation of this study, taking the unit price of framework engineering as an example, 3 years ago, the average price was NT＄265/m2, but today, it is more than NT＄450/m2.
This study conducted on site investigations of 6 construction cases as Silver River Front, the New World, University Plaza, The Forbidden City, and the Future City A and B in the greater Taipei area, the total flooring areas of the abovementioned 6 construction cases are 500,000m2 which represented the typical congregate housing construction. The study on productivity according to the traditional framework engineering was also included. Under the prerequisite of progress requirement, 8 factors such as the sets of framework used, the number of labors, the composition of framework material, the statistics of the metal hardware consumption, the processing of wastes, the loss and wearing of equipments, the transportation and removal of residual materials, storage and maintenance were used as the basis for productivity analyses in order to fully understand the content and implementation of the study. Interviews were also conducted to the managers and technicians.
According to the analysis of preliminary results, it indicated that the systematic order of the framework materials and the applications of metal screw components, the reinforcement and lightweight of the steel-back supporting materials, the electro-equipment and weight-lifting equipment would help to upgrade the productivity. The analysis of this study showed that 5-years ago, and the productivity was 15 m2/man-day, but the figure reduced to 12 m2/man.day at present. Through interviews, we know that the average age of labor is 50 years old today, and labors more than 45 years old account for about 50% of the total labor force; without the participation of young men in framework engineering, coupled with the aging of the present labor force, which would influence the productivity in framework engineering greatly. The result of this study would make the professionals look at the problems of aging and shortage of labor seriously, and would be helpful to the management strategy in the future, cost control and overall construction management.
Subjects
集合住宅
模板工程
生產力
Residential Buildings
Construction Formwork
Productivity
SDGs
Type
thesis
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