2 Sarah Brown is project manager on a construction project involving the construction of a major hospital sited in a congested metropolitan area. To facilitate collaboration on the project, a BIM model has been developed showing both the underground foundation and parking garage as well as the above ground structure. The curtain wall subcontractor has requested access to the model including the ability to modify some structural elements to facilitate the installation of the curtain wall elements.

• Should Sarah allow the curtainwall subcontractor to modify BIM model structural elements?

• What action should Sarah take? Why did you make this recommendation?