| Title |
An Effect Analysis of Subtracting Rebar Volumes in Reinforced Concrete Members on Quantity Take-off |
| Authors |
Kang, Jong-Min ; Kim, Seong-Ah ; Chin, Sang-Yoon |
| DOI |
http://dx.doi.org/10.6106/KJCEM.2012.13.6.024 |
| Keywords |
Concrete ; Quantity take-off ; BIM |
| Abstract |
Reinforced Concrete is the most dominant structure type for buildings in South Korea. Reinforced Concrete is one of materials having the most cost and quantity at construction projects. It is important to manage concrete quantity so that the total project cost is not affected due to underestimate or overestimate of its quantity. Generally the concrete quantity is taken-off based on the volume of the space inside forms without subtracting volumes of rebar embedded, which cannot be considered to make quite accurate results. Resource waste and extra cost due to over or under estimate of quantity occur since they cannot estimate accurate quantity at practices. Therefore, the objective of this paper is to analyze the effect of the volume for rebars embedded in reinforced concrete members. By comparing the quantity based on the existing method with the one from BIM data, it was found that about 1~2% of quantity discrepancy was observed while the typical concrete waste rate is 1 % at the current practice. |