ABSTRACT
Constructability has emerged as an important tool for improving construction performance, productivity and quality. Recently, it has been suggested that constructability can be promoted through the use of Building Information Modeling (BIM). This research focused on BIM based methods used on the building site in order to improve constructability at the construction stage. An empirical study was carried out by using three different research methods; interviews, action and literature research. The research group helped personnel in charge of construction works solving daily issues and to search optimum solutions for constructability with BIM-based methods. Solutions were tested with the personnel. Constructability development was winded around 4D schedule including visualization, 3D site layout and modeling of temporary support and structures. With BIM-based 4D schedule the constructability of structures could be analyzed, and it was easier to control and instruct workers, plan tasks beforehand, make procurements and plan an assembly sequence than using conventional construction planning methods.
