SUSQUEHANNA CENTER RENOVATIONS & EXPANSION
BEL AIR, MD
ELECTRICAL/ LIGHTING OPTION
ARCHITECTURAL ENGINEERING SENIOR THESIS PORTOFLIO
This page was last updated on 4/26/2011, by BRAD GAUGH and is hosted by the AE Department © 2010
Construction on the Susquehanna Center has not yet begun, but the predicted construction periods are from April 2011 till August 2012. As of now the building is in the bidding phase and the general contractor has not been selected. However, Turner Construction has been hired by the owner to act as a construction manager on the project. The building method chosen for this building is design-bid-build, and the initial budget is approximated at $28 million. The building is a renovation and expansion to the existing basketball facility that is already located on Harford Community College’s campus, in which it’s front façade faces Thomas Run Road of Bel Air, MD
The power distribution system for this building is a simple radial system, with the service entrance point on the North West portion of the building on the main level. The building is fed by a 2000kVA pad mounted transformer supplied by Baltimore Gas and Electric (BGE). The secondary side of the transfer is listed at 480Y/277V, 3PH, 4W. The main switchgear is rated at 3200A and 42000AIC. This switchboard then feeds distribution panels located throughout the corners of the building, which in turn feeds lighting and receptacle panels. These panels and loads are listed at 480Y/277V, 3PH, 4W and 208Y/120V, 3PH, 4W respectively. There are additional transformers used to step loads down to the 208Y/120V voltage system.
As the building is designed to meet USGBC’s standards for LEED accreditation, the lighting is designed to use energy conscious fluorescent and metal halide pulse start fixtures. This allows the design to use minimum energy consumption and meet ASHRAE 90.1 standards on lighting power density. The lobby, bathrooms, classrooms, and other spaces use linear fluorescent and compact fluorescent down lights with electronic ballasts to limit power factor and light loss. The low bay metal halide fixtures in the auxiliary gymnasium and main arena use restrike technology on certain fixtures to allow for instant switching.
The mechanical system for this building utilizes variable air volume air handling units (AHU), which all have total energy recovery wheels that greatly reduce the cooling and heating demand for the units. The cooling is generated by an air cooled high efficiency chiller and the pool uses a solar heating system as the primary source of heating. The AHU for the pool has a DX refrigeration system that uses hot refrigerant gas to reheat the air, so that it can be properly de-humidified. Lastly there is a rain water harvest system, which takes water from the Arena roof and stores a 10,000 gallon underground storage tank. This water is then filtered and pumped to be used in toilets and urinals throughout the arena.
The foundation of the building is comprised of concrete column footers ranging in size from 5’x7’x1’-7” to 11’x11’x2’. The main floor is a two way slab, in which the slab’s thickness is 3-1/2” and the grade beams with a thickness of 10”. The superstructure of the building is composed of both concrete and steel beams. The concrete beams are 16”x16” and 18”x38”, while the steel beams are primarily W10x33 and HSS 6x6x1/2. The main arena utilizes 60” deep 96SLHSP trusses to span 157’ laterally.
The fire alarm control panel is located at the main level of the lobby. There are numerous signal and detection devices throughout the building. There are horn strobes located throughout the corridors and large public spaces. Smoke detectors, manual pull stations and signaling devices are also located per standard NFPA 72 requirements.
There are voice/ data outlets located in offices and classrooms to allow for telephone and internet connections. There is also an intercom system that serves the main arena of the gym to allow for commentary during games.