| Summary: | 碩士 === 國立交通大學 === 工學院工程技術與管理學程 === 104 === Estimating construction costs is related to the unit cost and quantity for each cost item. That is, accurately conducting quantity takeoffs (QTO) is crucial to generate acceptable cost estimates. Current practice pays much attention to the QTO of Civil/Structure/ architectural (CSA) construction part of a construction project. However, the Mechanical/Electrical/Plumbing (MEP) part could be approximately 15% to 30% of the total costs for of a construction project. To improve better understanding of the quantity takeoffs method for MEP construction, the study investigates three aspects, including the classification methods of MEP, the MEP takeoffs process and principles, and case study.
Regarding the classification methods of MEP, three conclusions are derived. First, based on system characteristics, the MEP can be classified as mechanical systems and electrical systems. And they can be further sub-categorized according to system functions. Second, base on piping line transmission substance, the MEP can be divided into electrical energy systems, liquid systems, and composite systems. Again, they can be further sub-categorized according to system functions. Third, “units” are “ratios” are the two methods to conduct QTO.
Regarding the MEP takeoffs process and principles, this study analyzes transmission substance categories and discusses the component of equipment and pipeline. This work integrates practical experience to discuss every category takeoffs method. Additionally, the cost items that can be categorized for QTO for MEP are equipment, piping line and duct. The quantity takeoffs units are identified to be point, length, and area.
Regarding the case study, this study applies the MEP takeoffs process and principles to a case project. The results show that the proposed process and principles are feasible. Finally, the factors affecting QTO that are identified in this study should help inexperienced engineers to understand the takeoffs for MEP projects.
|
|---|
