Case Study: During the construction of Wilmer-Hutchins Elementary School in Dallas, Texas, the contractor had concerns about ceiling clearance for lighting, heat pumps, ductwork, and plumbing. They requested that the ceiling be lowered 12" (from 10' to 9') to accommodate these items.

The web site for the U.S. General Services Administration (GSA) includes an interesting and informative 12-minute video highlighting the group's national 3D-4D BIM program. The video includes comments from a variety of experts and shows multi-dimensional BIM drawing examples. The video also contains valuable insight into the future of BIM; including a prediction that two dimensional drawings will be absolete within the next 10 years. Worth checking out.