IDENTIFYING BUILDING PRODUCTS THAT SUPPORT BIM-BASED QUANTITY TAKE-OFF USING THE NIGERIAN BESMM 4
IDENTIFYING BUILDING PRODUCTS THAT SUPPORT BIM-BASED QUANTITY TAKE-OFF USING THE NIGERIAN BESMM 4
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Date
2017
Authors
ABDULLAHI, M. OMBUGADU, T.J. IBRAHIM, Y,M. IBRAHIM, A.D. ABUBAKAR, M. ALI, A.A.
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Abstract
The Industry Foundation Classes (IFC) data schema developed by the BuildingSMART International has been
the major and most widely used solution to interoperability challenges in Architecture Engineering and
Construction (AEC) industry. Despite its wide acceptance by software vendors and the industry in general,
studies have reported the schema to be inadequate as it does not fully cater for local requirements/standards
which vary from one country to the other and, therefore, researchers have developed schema extensions to
capture local requirements of different countries across various domains. In Nigeria, the Building and
Engineering Standard Method of Measurement (BESMM 4) is currently the standard of measurement of
construction works and, to date, an assessment of how well the IFCs data schema supports the measurement of
construction works using the BESMM 4 is not known. Therefore, this paper as part of a study proposing schema
extensions for cash flow management identifies building products that support BlM-bascd quantity take-off with
their corresponding IFC entities, classes and attributes based on the current IFC Data Schema (IFC4 Add 1).
Qualitative research approach based on desktop studies and document analysis was employed in identifying
building products as contained in the BESMM 4, and then the corresponding IFC specifications that describe
these building products were similarly identified in the most recent of IFC Data Schema (IFC4 Add 1). The study
concludes that current BIM platforms and software application cannot adequately support quantity take-off of
building works using BESMM 4.
Description
1. Department of Quantity Surveying, Faculty of Environmental Design, Ahmadu Bello
University, Zaria, Kaduna State, Nigeria.
2 Department of Buillllllding, Faculty of Environmental Design, Ahmadu Bello
University, Zaria, Kaduna State, Nigeria.
E-mail of Corresponding Author: bnabdallah02@gmail,com