Furthermore, it can be difficult to edit a model in the future if its design is not finalized. Nevertheless, this is a time-consuming and error-prone solution. In order to obtain accurate quantity takeoffs of these layers, each compound element layer that is composed of a core layer and other layers must be created according to the actual construction. Compound elements, such as walls and floors, always face this issue because they contain multiple material layers, which can have different sizes. Incomplete details and inappropriate modeling methods cause deviations in extracted quantities. However, the quality of BIM models affects the accuracy of the extracted quantities. A R T I C L E I N F O Keywords: Building information modeling Quantity takeoff BIM-based quantity takeoff Quantification Compound element A B S T R A C T Quantity takeoff based on Building Information Modeling (BIM) is a faster and more reliable method than the traditional 2D-based quantity takeoff approach.
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