Duke Eye Center
Duke Eye Center – Duke University Medical Center
Durham, North Carolina
Off Site Construction – Penthouse Replacement
EAS was contracted to provide design assistance, off-site construction, shut down planning and installation for a new penthouse to replace two existing penthouses.
EAS was responsible for complete demolition of an existing penthouse and the “gutting” of another penthouse. Total shutdown was for a period of five (5) days over two weekends. The speed of this project could only have been achieved through an EAS Off Site Construction (OSC) approach. A traditional design-bid-construct contract method would have added substantial project cost and trade coordination issues.
Duke’s original plan was for 60 to 90 days of construction — EAS reduced that timeframe to two weekend shut downs.
This is one example of many projects EAS has completed for Duke over the years.
1. 80,000 CFM System measuring approximately 66’ x 38’ x 12’ high
2. EAS had the task of removing one penthouse, with AHUs that were installed in 1974 before installation of the new EAS penthouse could start
3. First shutdown commenced about 6:00 PM on a Friday afternoon
4. System start up took place about 6:00 PM on the following Sunday afternoon
5. During the first weekend shutdown, ductwork from the new EAS penthouse ran to the existing penthouse, keeping it operational
6. Second weekend shutdown was for 2 days to demolish the AHUs in the second penthouse that EAS took out of service
7. The job required two (2) 12-hour shifts per day, comprised of 32 men per shift
8. The existing penthouse which had the mechanical equipment removed, was given a new exterior to the match the new penthouse, leaving Duke with a 50’ x 30’ storage building for filters, etc.
9. EAS worked in a design/assist role with IES Engineers, the Consulting Engineer, and RND Architects, the Architectural Consultant
10. EAS provided phasing coordination, feasibility studies and budget development
11. Down time was limited due to good planning, coordination and communication
Hot Deck / Cold Deck Design to match existing HVAC Scheme
80,000 CFM Cold Deck Supply, using two (2) 75 HP Class III Supply Plenum Fans
58,000 CFM Hot Deck using (1) 100 HP Class III Supply Plenum Fans
Two (2) Return / Relief Air Fans at 36,000 CFM each, Plenum Fans
One (1) Vertical Exhaust Fan
Variable Frequency Drives
Cooling and Reheat Coil banks, 304 Stainless Steel
Relief Air, Return, Bypass, Return Air and Outside Air Dampers
Pre, Intermediate and Final Filters Sections
Schedule 40 chilled water and hot water piping systems with valves and accessories. At the shipping splits, there are flanged or grooved connections for the hot water and chilled water piping