Acknowledgement
The author would like to thank Tony Hsu, President of ArcArtConstruction and Huan-Chang Tseng, senior engineer with ArcArtConstruction. Without their valuable contributions, this research would not have been possible.
The focus of this study is on the accuracy in quantity estimates made by BIM for materials needed during construction. BIM-Revit Architecture 2014 is utilized to establish the information for an actual case to conduct estimates for the amount of reinforced concrete and formwork needed. The actual case is with a total construction area of 5,438 square meters and a total floor area of 31,623 square meters. The building commenced in December 2012 and the major structure has been completed in 2014. It is a RC structure with 4 stories underground, 12 stories above and 3 roof floors. The result shows that both of the quantity estimates of reinforced concrete and formwork are higher than that of actual use in the case. The estimate of reinforced concrete is higher than that of actual use by 2.18%, while the estimate of formwork is higher than that of the actual use by 13.04%. The results indicate that the estimate of reinforced concrete made by BIM has high accuracy, but the accuracy of the formwork estimate still needs improvement.
The author would like to thank Tony Hsu, President of ArcArtConstruction and Huan-Chang Tseng, senior engineer with ArcArtConstruction. Without their valuable contributions, this research would not have been possible.