For the 3D model inputs, three different models have been created
to represent simple, moderate, and complex BIMs. In this
research, the authors are only focusing on structural models and
architectural elements, as well as piping, equipment, and HVAC,
are not included in these models. The level of complexity of the
models is detected based on number of the structural elements,
size of the model, and connection types between structural elements.
The screen shots from three different BIM inputs to the
method are shown in Fig. 11.