Building Statistics
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Building Name – St. Louis Children’s Hospital Expansion
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Location – St. Louis, MO
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Building Occupant Name – St. Louis Children’s Hospital
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Occupancy Type – Hospital
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Size – 224,000 gsf + 23,500 gsf below grade garage
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Floors – 12 above grade; 1 below grade garage; two-levels of penthouse (roof and helipad levels)
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Primary Project Team
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Owner – St. Louis Children’s Hospital
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General Contractor – Jacobs
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CM – ACW Alliance
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Architect – HOK
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Chief Engineer – BR+A
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Dates of Construction – November 2014 - June 2017
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Building Cost - $127 Million construction
General Building Data
During the design phase, user groups (employees, clinicians, leadership) helped designers to understand how the service works so that the expansion design could be as functional as possible. The clear design focus is functionality and they plan to add private patient rooms, improve parking, and incorporate more green space on the site. The parking garage will be below grade and then the patient floors will make up the majority of the high-rise.
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Major National Codes
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2009 International Building Code
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2009 International Existing Building Code
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2009 International Energy Conservation Code
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2009 International Property Maintenance Code
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2009 International Fire Code
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2009 Uniform Plumbing Code
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2009 International Mechanical Code
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2009 International Fuel Gas Code
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2009 National Electrical Code
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City of St. Louis Zoning Ordinance
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During the design phase, user groups (employees, clinicians, leadership) helped designers to understand how the service works so that the expansion design could be as functional as possible. The clear design focus is functionality and they plan to add private patient rooms, improve parking, and incorporate more green space on the site. The parking garage will be below grade and then the patient floors will make up the majority of the high-rise.
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Major National Codes
-
2009 International Building Code
-
2009 International Existing Building Code
-
2009 International Energy Conservation Code
-
2009 International Property Maintenance Code
-
2009 International Fire Code
-
2009 Uniform Plumbing Code
-
2009 International Mechanical Code
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2009 International Fuel Gas Code
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2009 National Electrical Code
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City of St. Louis Zoning Ordinance
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Architecture
Above is a close up view of the project site in relation to the city of St. Louis.
Meeting the code minimum on insulation actually results in what would be considered a high performance envelope. This includes providing continuous insulation that is not penetrated by any cladding-support structure. Optimized glazing selections were made based on space type and orientation to provide load reductions and reduce cooling capacity. Both the floor and the roof were chosen to meet the minimum value of insulation required by the code.
Building Enclosure
Above is a Zoning map of the city of St. Louis. For more information about zoning in St. Louis click on the picture above!
The building does not necessarily have a stand out sustainable feature; however, substantial energy savings are achieved in space heating. This is through the use of the condensing boilers, heat recovery chillers, and improved envelop design.
Energy savings are also achieved in the interior lighting design. It includes automatic lighting controls which are above the code. Other energy and cost saving strategies include variable speed drives on two of the chillers, triple glazing and low static pressure design.
Sustainability Features
The St. Louis Children’s Hospital broke ground in November of 2014 and will be completed in June of 2017. The project consists of 224,000 gross square feet above grade with an additional 23,500 gross square feet of below grade garage space. In addition, the project will cost an estimated $127 million dollars to construct.
There are also several challenges that the construction team is facing due to the location of the job. The project is on the University of Washington at St. Louis’ campus and is an addition onto an existing hospital. This means that they have to work around both student and employees on campus and in the existing hospital.
PRIMARY ENGINEERING SYSTEMS
Construction
The several story below grade parking garages ties into the foundation of the tower. The structure is made up of a steel framing systems with concrete spread footings and large mat slab. The steel framing includes W16x40 beams and W27x129 girders. The frame holds up metal decking and cast in place concrete slabs on each floor.
Structural
Much of the building contains functional LED lighting fixtures. There is a big focus on energy efficiency and because of this they have reduced the lighting power density by 30% under code compliance, added dimming controls, and reduced the overall plug loads with efficient appliances. In addition, the building receives its electricity from the utility and the building utilization voltage is 277/480V
Lighting/Electrical
The primary mechanical system is a variable air volume system with reheat. In addition the plans do call for some constant air volume diffusers where necessary. To handle the cooling and heating needs of the buildings four Chillers, four cooling towers and 2 dual-fan natural gas condensing boilers will be installed in the building. The total proposed cooling capacity is 4,880 tons and the total heating capacity is 32,400 MBU. The service hot water will be taken care of by steam fired water heaters that can heat to a temperature of 140 degrees.
Mechanical
ADDITIONAL ENGINEERING SYSTEMS
Per code requirements, the St. Louis Children’s Hospital is equipped with smoke detectors, an alarm system, and smoke dampers. There is a typical high rise building stair pressurization and fire alarm control equipment which provides a 2 hour fire rating. Since the building is mostly made up of patient rooms, there is also an emergency communication in place to allow patients in the hospital to communicate with staff if they cannot leave the building on their own.
Fire Protection
Guests will most likely arrive through the main entrance and enter the lobby of the hospital. Several elevators will be easily accessible for people to use off of the main lobby. There will also be a connection between this building and the Barnes-Jewish Medical Center. These buildings are both currently being built and will add to the existing Washington University of St. Louis Medical Center. Since these buildings are on a college campus, they will be easily accessible by foot to a large number of students and local community members.
Transportation
Since the building is going to be future patient rooms, an effective communication system throughout the hospital is critical. Patients will be able to communicate with the staff on duty when necessary and an emergency system is in place to ensure the patients are in the safest environment possible. Telephone/data/television services will be available in all rooms to provide comfortable and functional occupancies.