| Title |
Simplifying Quantity Takeoff of Beam Rebar Using BIM Properties in the Detailed Design Phase |
| Authors |
이하늘(Lee, Ha-Neul) ; 김유경(Kim, You-Kyung) ; 이유신(Lee, Yu-Sin) ; 윤석헌(Yun, Seok-Heon) |
| DOI |
https://doi.org/10.5659/JAIK.2024.40.10.277 |
| Keywords |
Rebar; BIM; Quantity Estimation |
| Abstract |
This study simplifies the rebar quantity calculation process during the detailed design stage using a LOD200-level model. The process
leverages BIM structural elements and rebar arrangement tables to estimate rebar quantities. It was applied to a case model to assess
accuracy and applicability. The restructured estimation formulas, based on existing formulas and BIM element analysis, were implemented in
the process. In the case model, the average error rates were 2.54% for the main rebar and 17.88% for stirrups compared to baseline
quantities. The main rebar quantities fell within an acceptable range, while stirrups showed a significant deviation. The error in main rebar
quantities is due to not accounting for splicing lengths and locations, while the high error rate in stirrups is linked to discrepancies between
the estimation formulas and shop drawings. Future research should focus on incorporating vector values and positions to improve continuity
determination and expanding automatic rebar quantity calculations to cover various beam types beyond general large and small beams. |