BUILDING STATS
General Building Data
Building name The Health Centre
Location Southeastern US
Occupancy Hospital
Size 448,000 SF of program space
Stories above Grade 9 + mechanical penthouse
Total Levels 14
Construction Dates January 2012 – 2016 (projected)
Cost $168-203 million
Project Delivery CM At-Risk
Project Team
Architecture SmithGroupJJR
Structural Walter P. Moore
Lighting/Mechanical ccrd
Construction McCarthy Building Construction
Civil/Site Kimley-Horn and Associates, Inc
Wind Consultant RWDI Consulting Engineers
Architecture
The Health Centre is a new “core-and-shell” university hospital expansion project that features a nine-story hospital bed tower and state-of-the-art technical facilities. Inspired by the concept of lifelines, the building is connected to a four-story underground parking garage and bridges leading other buildings onthe hospital campus. As a nod to the heritage and character of the surrounding university campus, TheHealth Centre takes its architectural cues from classical Italian and contemporary sources. Materialsand style match the adjacent existing hospital building. The primary objective of the space is to createan inviting and healing environment for the patients using familiar and natural materials.
A variety of health facilities are offered in the building, including operating rooms, an intensive care unit,emergency department, clinical facilities, and med-surg patient rooms. All services and facilities aredivided into an integrated community-of-care for optimum interior circulation. Spaces are designed tobe flexible for future growth and technological advances, while maximizing program efficiency. Set-backs have been utilized to scale the Health Centre to the size of the surrounding buildings and providea sustainable green roof.
Building Enclosure
Metal Panel Wall System
A prominent enclosure feature of The Health Centre is an aluminum and zinc composite metal wall panel assembly. Behind the 12” long panels is PVC membrane, 4” of rigid insulation, sealant and backer, and vapor retarder. Through-wall flashing in the assembly contributes to moisture control. Panels are attached to 8” exterior non-load bearing steel studs connected to 4” continuous light gauge angles spaced at 16” OC.
Stucco Wall System
The exterior cement stucco plaster system is a part of the building’s Italianate architectural inspiration. 7/8” of stucco attaches to light gauge steel zee with an 1 ¼” air gap followed by rigid insulation and pvc waterproofing.
Roofing
Both metal and concrete deck roof assemblies are typical for The Health Centre. The typical concrete roof assembly consists of a PVC roof membrane, cover board, roof insulation, vapor retarder, concrete slab. For metal deck, the assembly consists of a PVC roof membrane, cover board, roof insulation per specifications, vapor retarder, substrate board, and spray fire-proofed metal deck.
Green roof areas utilize 12”x24” hybrid tray modules from Live Roof that vary in depth from 4” to 6”. Vegetation rests atop approximately 5” of geotextiles, zinc-faced composite metal panel, and PVC sheet waterproofing. A uniform graduation of 1” to 2” deep landscaping stones are scattered throughout the green roof region. Underneath the green roof assembly is a concrete slab.
Curtain Wall
Curtain wall enclosures for the building are typical conventional aluminum curtain walls. Glass is coated with two-sided structural sealant and designed for a framing member deflection of the clear span divided by 175. Stringent adherence to both wind and seismic loading requirements per code was observed during design. On the interior side of the spandrel glass insulation is a 22GA minimum galvanized steel backpan. All curtain wall assemblies are fabricated in the factory, assembled in the field, and tested both before and after assembly.
Sustainability Features
The Health Centre aims to become a LEED silver building based on USGBC’s (United States Green Building Council) requirements for Health Care facilities. In addition to the USGBC requirements, the building will adhere to specific sustainable requirements set by the university. Visually articulating these sustainable initiatives is a featured green roof on the building’s lower roof level. Recycled and local materials will be used whenever possible for interior and exterior finishes. VOC content for sealants, adhesives, paint, and other materials will be documented throughout the construction process by the contractor.
The implementation of sustainability initiatives began with construction in 2012 – dirt and filling material from the site was used to build a new soccer field elsewhere in the local community. As construction nears completion, the site will continue to play an important role in The Health Centre’s sustainability initiatives. Bioswales will be implement on site to drain runoff water, and all trees removed for construction are scheduled to be replanted.
Structural Systems
Bed Tower
The superstructure above grade consists of cast-in-place intermediate concrete moment frames and a one-way concrete slab. Typical bays are 30 ft by 30 ft wide with 36”x25”girders and 9”x25” beams spaced at a 8’-6” clear span. The typical slab depth is 5” and 7” with regularly spaced 2” floor depressions on floors 5-9. Columns from ground to level 4 are 28”x32”, and 24”x24” squares from level 4 to the mechanical penthouse. Concrete strength of all above grade superstructure is 5000 psi.
Parking Garage
Parking garage floor slabs are 8” two-way post-tensioned concrete with 30 ft by 30 ft bays continuing down from the bed tower. Columns are 28”x28” in the lower parking garage levels and are cast from 7000 psi strength concrete. Foundations are mainly drilled piers with a maximum depth of spread footings located near the existing “Clinic B.”
Mechanical Systems
Most mechanical equipment is located in the Central Energy Plant on level 2 of the parking garage to ensure slab-on-grade installation of vibration sensitive equipment. Some air handling units are located on the 10th floor penthouse. The Central Energy Plant supports a chilled water cooling system and high pressure steam heating system. All existing HVAC services to the Health Centre will be combined with existing ‘Clinic B’ facilities
Cooling systems use chilled water provided from three 1250 ton centrifugal chillers, two 1250 ton cooling tower cells, and a 400 ton heat pump chiller. An additional 1250 ton chiller and cooling tower cell were added for possible hospital expansion. The chilled water distribution system is a constant flow primary loop with a variable flow secondary loop. All operating and surgical rooms are served from dedicated air handling units.
The campus steam distribution system is utilized for heating purposes in the Health Centre. A two-stage pressure reducing station is located in the Central Energy Plant. Steam at 30 PSIG pressure provides hot water through two shell and tube heat exchangers and three pumps to heat the building. Steam and condensate return piping systems distribute steam to the air handling units, water heaters, and heat exchangers, and then return condensate to the campus steam condensate return system.
Electrical Systems
The electrical distribution systems and emergency generators are located in the Central Energy Plant and are designed for an expected load of 750 KVA. Power for the building is supplied from a power vault located adjacent to the building’s Central Energy Plant. The electrical vault contains the incoming medium voltage electrical switchgear, transformers, and the network equipment. The incoming services switchgear distributes power to the distribution switchboards and panelboards, which in turn distribute power to the branch equipment.
The essential power system utilizes three 1500kW, 480/277V volt diesel engine-driven emergency generators. These generators are also located in the Central Energy Plant. The Energy Plant will also contain a space for another generator should the hospital expand again in the future. A total of 13 transfer switches are used in the Health Centre. All transfer switches are 4-pole, bypass isolation and function to report status and start signals to the paralleling gear using individual start signal cables.
Electrical rooms are located on each level of the Health Centre and are stacked to utilize vertical feeder risers. Feeder risers are routed from the main 480/277V switchgear vertically throughout the building. Operating rooms contain two isolated branch panels.
Lighting
LED and fluorescent lighting is incorporated throughout the building. The typical light fixture in public, patient, and administrative areas is a two-lamp, 2’x4’, direct/indirect basket-type LED troffer. Typical corridor lighting is indirect and often utilizes wall sconces. In general, typical down lighting in the Health Centre is LED.
Patient rooms have specific lighting settings and controls located at the room entrance. Controls are set for both general and night lighting conditions utilizing 2’x4’ multi-function exam lights and 2’x2’ direct/indirect ambient troffers. All fixtures in the patient rooms are connected to the distributed relay lighting control system and are dimmed during off-peak hours or switched off in unoccupied rooms. Operating rooms use a 6-lamp, 2’x4’ lensed troffer specifically approved for an OR environment. These troffers require uninterrupted power.
The below-grade parking garage lighting uses rows of LED fixtures. Additional fixtures are provided at the entrances and exits to maintain approximately 50 footcandles. All exits from both the building and parking garage have life-safety lighting.
Construction
Construction on the Health Center began in 2012. The building will be finished in 2016 and open to the public in 2017. During construction, improvements were made to emergency and valet parking in the existing ‘Clinic B’ to maintain full accessibility to its facilities. Temporary pedestrian walkways were also installed for this purpose. Full mock-ups were constructed of patient rooms to generate feedback from patients, family members, and hospital staff. Overall, work is scheduled to be completed in three phases and coordinates the movement of some facilities in ‘Clinic B’ to the Health Centre. The project delivery method is CM-at risk.
Engineering Support Systems
Fire Protection
Floor assemblies and secondary structural members require a two hour fire rating, while bearing walls and similar assemblies require a three hour fire rating. The typical fire suppression system is a combination of sprinklers and standpipes. The main sprinkler system uses automatic sprinklers with wet type, quick response sprinkler heads and are installed throughout the building. Some areas of the building will also have a pre-action, double interlock, hydraulically designed, sprinklers controlled by an electronic release signal.
Transportation
A main elevator core of 6 elevators is located in the north end of the building and extends from the basement to the ninth story. 6 smaller elevators are scattered throughout the building to support building circulation. The circulation core of the building is the long rectangle of the bed tower that extends to the mechanical penthouse level.
Telecommunications
Telecom service to the building begins at street utilities and ends next to the Central Utility Plant. 3-4” conduits are used to distribute telecommunications services, with IT/Comm closests located on each floor of the building.