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TECHNOLOGY & METHODS
The expansion consisted of a nine-story patient-care tower joined to the existing hospital with several sky bridges.
scheduling and 5-D cost. For example, 3-D models were
commitment was made in the process to use BIM for the design, engineering and construction of this project. The team used software from Autodesk, including Revit Architecture, Revit Structure, Revit MEP, AutoCAD Civil 3-D, and Autodesk NavisWorks. The team shared a common fi le transfer protocol site for fi le sharing. The project team's collaboration
in the use of BIM was effective in overcoming the challenges associated with every stage of the project from design through construction — for 3-D visualization, detailing and coordination, 4-D
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utilized for MEP coordination to identify confl icts among the trades and the structural model. Detailed 3-D models also proved valuable for construction detailing and layout for self-performed work. The models showed detailed connections, gusset plates and accurate sizes for beams and columns, which enabled
extensive prefabrication of the structural steel system. The model was tied to project
planning software to allow simulations of the built environment, adding a fourth dimension to the use of BIM. Finally, 5-D models were developed to determine accurate quantities of materials and schedule pre-ordering of long-lead items.
PERFORMING CLASH DETECTION IS JUST THE BEGINNING
Detailed 3-D models also proved valuable for construction detailing and layout for self- performed work.
BIM was particularly useful in enabling the IPD team to perform clash detection among large, complex systems with a positive impact on design, budget and schedule. For example, the team used 3-D modeling early in the design process to visualize how mechanical and electrical systems would fi t within the new central utility plant. The mechanical subcontractor used the 3-D models to begin early
March/April 2012 | Medical Construction & Design 39
