ANALISIS PERBANDINGAN QUANTITY TAKE OFF MENGGUNAKAN SOFTWARE REVIT DENGAN METODE KONVENSIONAL

(Studi Kasus: Jembatan Tol Probolinggo Banyuwangi Paket 3)

Abstract

Advances in construction technology, particularly Building Information Modeling (BIM), offer solutions to improve the accuracy of quantity and cost estimation. This research aims to calculate and compare the results of Quantity Take Off (QTO), percentage differences in volume, and discrepancies in the Cost Estimate between BIM and conventional methods. The study is driven by the high potential for human error in conventional methods, which rely on manual calculations from 2D drawings, making a comparison with the more integrated BIM method highly relevant. This research applies a quantitative approach, with a case study on the substructure of the Paiton 2 Bridge, using project shop drawings as secondary data. The data analysis compares two methods. The first method utilizes Autodesk Revit software for 3D modeling and automatic quantity extraction. The second is the conventional manual volume calculation using AutoCAD and Microsoft Excel. The theoretical framework is based on QTO concepts and 5D BIM, which integrates cost aspects. The findings show differences in both volume and cost. Calculations using Revit resulted in a 0.62% smaller rebar volume and a 0.27% smaller concrete volume compared to the conventional method. Consequently, the total structural work cost from Revit was 0.44% lower. In conclusion, the BIM method using Revit produces more precise and detailed quantity and cost data, potentially reducing material waste and proving more accurate than the conventional method, which is prone to manual interpretation errors.