Design-build delivery played an instrumental role in realizing the project’s ambitious goals. As a part of this approach, the design team fully integrated with the construction personnel, including key subcontractors. From early design phases through project completion, they collaborated on each design submittal and package to ensure constructability, expedite work and control quality and costs.
To further accelerate construction, an innovative phased design approach was developed by the project team. Construction and design staff worked alongside NAVFAC to identify critical path activities available for early starts. This approach shaved two weeks from the schedule. For instance, by sequencing the structural package as one of the first to be reviewed and approved, the hospital’s foundation work began two weeks early. A portion of the civil design was also moved into an early package, facilitating the relocation of two high-voltage transmission lines clearing the way for an early start of mass grading.
Virtual design and construction technology was implemented at the project's inception to design and coordinate construction for all aspects of the hospital. Three dimensional models aided in budgeting, improved work flow, resolved field conflicts and allowed for quality control through all phases of the project. Taking Building Information Modeling (BIM) technology one step further, the model was linked to the project’s cost-loaded CPM schedule to produce a 5D tool (3D geometry, time, cost) that automatically adjusted when changes were made. The model was also used to prefabricate a variety of materials and components thus ensuring quality and expediting installation of various components of the building, including window and exterior framing assemblies, ductwork, piping, casework, a pneumatic tube system, mechanical systems and electrical distribution systems.
In collaboration with NAVFAC and Navy Medicine, a medical equipment package was developed utilizing the Basis-of-Design specifications and the experience of Navy Medicine user groups to select more than 20,000 pieces of equipment and coordinate the building infrastructure to accommodate it. Best Value Determination was used for every item, allowing the Navy an opportunity to compare models, options, maintenance contracts and lifecycle costs. This turnkey delivery method, which is usually performed by multiple subcontractors, successfully maximized quality, minimized added costs and expedited the construction schedule.
To achieve LEED Gold Certification, the hospital's design incorporates a variety of sustainable features, including green roofs, healing gardens, an open-air atrium, solar cells, horizontal and vertical sun screens, maximized use of recycled materials and low-flow plumbing fixtures. Resulting from these eco-friendly features, the building’s energy performance is 30% better than baseline standards set by the American Society of Heating, Refrigerating and Air-Conditioning Engineers. The team went above and beyond efforts needed to achieve all five Innovation in Design credits by using more than 20% recycled content, reducing water usage by more than 50%, restoring vegetative open space that is more than twice the footprint of the building and implementing a campus-wide education program that highlights the hospital’s sustainability.
Key Lean practices, and a positive safety culture further contributed to the project’s success.