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Holy Cross Hospital – North Addition

This final report discusses the lighting and electrical design of the Holy Cross Hospital's North Addition in Silver Spring, MD. The report covers topics such as lighting design for registration space and main lobby, electrical depth, and final conclusions. The project was completed in July 2005 with a total cost of $21.9 million.

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Holy Cross Hospital – North Addition

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  1. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Holy Cross Hospital – North Addition Philip Mackey The Pennsylvania State University Architectural Engineering L/E Option

  2. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Project Background Location: Silver Spring, MD Owner: Holy Cross Hospital Architect: SmithGroup Engineers: Leach Wallace Assoc. (MEP) CM/GC: Bovis Lend Lease Size: 124,000 s.f. Completion Date: July 2005 Final Cost: $21.9 million $7.8 million MEP * North Addition part of a global renovation plan for the facility totaling 260,000 s.f. and costing $69 million.

  3. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Topics of Discussion Lighting of Registration Space Lighting of Main Lobby Electrical Depth Final Conclusions Acknowledgements Covered in Final Report CM Breadth Mechanical Breadth

  4. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Topics of Discussion Lighting of Registration Space Lighting of Main Lobby Electrical Depth Final Conclusions Acknowledgements

  5. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Lighting Depth – Registration Space Architectural Features: Curved wooden south façade Frosted glass north façade Open to concourse/lobby on east and west walls Metal partitions separate each workstation Design Goals: Accent architectural features Limit spill light into admin. Offices Provide ample task illuminance 30 fc horizontal (reading) 10 fc horizontal (corridor)

  6. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Lighting Depth – Registration Space 4” Open Downlights (18TRT) 4” Open Downlights (13Q) 2x2 Direct/Indirect Recessed Basket

  7. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Lighting Depth – Registration Space Computer Analysis Results: (AGI32) Allowable Power Density: 1.3 W/ft2

  8. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Lighting Depth – Registration Space Final Solution:

  9. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Topics of Discussion Building Background Lighting of Registration Space Lighting of Main Lobby Electrical Depth Final Conclusions Acknowledgements

  10. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Lighting Depth – Main Lobby Architectural Features: Information Kiosk central to space Reading area in SW corner Art wall adjacent to entrance Wood-paneled north facade Design Goals: Bring attention to info kiosk Accent architectural features Provide ample task illuminance at kiosk and reading space Accent back wall to limit depth of space 10 fc horizontal, 3 fc vertical (corridor) 50 fc horizontal (info kiosk) 30 fc horizontal (reading space)

  11. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Lighting Depth – Main Lobby 6” LED Cove Fixture 6” LED Cove Fixture In Column

  12. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Lighting Depth – Main Lobby 6” Recessed Downlights (42TRT) Ceiling Mounted Photosensor Dimmed 6” Recessed Downlights (42TRT)

  13. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Lighting Depth – Main Lobby Daylight Study Results:

  14. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Lighting Depth – Main Lobby Computer Analysis Results: (AGI32) Allowable Power Density: 1.3 W/ft2 (lobby) 1.2 W/ft2 (reading)

  15. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Lighting Depth – Main Lobby Final Solution:

  16. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Electrical Depth – Alternate 1 - denotes 480Y/277V panel Proposed Normal Power Distribution Existing Normal Power Distribution - denotes 208Y/120V panel Panel MDP-N Panel MDP-N XFMR T-L Schematic: Panel LP-1N Panel LP-2N Panel LP-3N Panel LP-4N Panel MDP-L XFMR T-1 XFMR T-9 XFMR T-11 XFMR T-2 XFMR T-3 XFMR T-4 Panel PP-2N Panel PP-2N Panel PP-2N Panel PP-2N Panel PP-1N Panel PP-1N1 Panel HCK Panel PP-2N Panel PP-3N Panel PP-4N

  17. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Electrical Depth – Alternate 1 - Feeder upsized due to voltage drop Summary:

  18. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Electrical Depth – Alternate 2 Proposed Standby Power Distribution Existing Standby Power Distribution - denotes 480Y/277V panel EX. EMERGENCY GENERATOR SETS SUBSTATION D ISOLATED EMERGENCY GENERATOR SUBSTATION D - denotes automatic transfer switch - denotes switchgear with secondary voltage 480Y/277V Schematic: ATS-1 ATS-1 ATS-3 ATS-3 ATS-4 ATS-2 ATS-2 NORMAL BRANCH NORMAL BRANCH EQUIPMENT BRANCH EQUIPMENT BRANCH LIFE SAFETY BRANCH LIFE SAFETY BRANCH CRITICAL BRANCH CRITICAL BRANCH EMERGENCY BRANCHES EMERGENCY BRANCHES

  19. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Electrical Depth – Alternate 2 - Feeder upsized due to voltage drop Summary:

  20. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Topics of Discussion Building Background Lighting of Registration Space Lighting of Main Lobby Electrical Depth Final Conclusions Acknowledgements

  21. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Final Conclusions Lighting Depth – Registration Space – complimented architectural elements while keeping fixtures minimally obtrusive to the space, provided sufficient illuminance levels under ASHRAE 90.1 Power Density recommendations Main Lobby – utilized light as a means to call attention to particular functions and artistic features within the space, created a more inviting space by washing the back wall, provided sufficient illuminance levels for various tasks under ASHRAE 90.1 Power Density recommendations Electrical Depth – investigated cost impact of centralizing normal branch step-down transformers, provided alternative emergency back-up power generation system and assessed the feasibility of proposed implementation

  22. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Acknowledgements Professional Leach Wallace and Associates, Inc. Reese Engineering, Inc. Faculty Dr. Richard Mistrick Dr. Martin Moeck Prof. M. Kevin Parfitt Personal Family Friends/ Roommates Fellow AE Students

  23. HC FINAL REPORT Phil Mackey HOLY CROSS HOSPITAL – NORTH ADDITION Questions? Comments

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