Abstract: As a new concept and technology, building information modeling (BIM) gradually changes
the work habits of design industry. However, a working pattern of ‘modeling after drafting’ which
means the modeling process lags behind the drafting process is widely applied for the time-being, and
it ultimately fails to improve the work quality and efficiency. This paper conducts a research about
generating 2D drawings based on IFC standard. Through analyzing the technical features of 2D
drawings, this paper summarizes the IFC expressions of 3D models and 2D annotations, suggests an
automated method to generate IFC-based annotations with consideration of practical demands of
drafting, and provides references for the development of localized BIM collaborative design platform.

Key words: building information modeling, IFC standard, construction drawings, automated
generation of annotations