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General Description:
The Capstone Project Electronic Portfolio (CPEP) is a web‐based project and information center. It contains material produced for a year‐long Senior Thesis class. Its purpose, in addition to providing central storage of individual assignments, is to foster communication and collaboration between student, faculty consultant, course instructors, and industry consultants. This website is dedicated to the research and analysis conducted via guidelines provided by the Department of Architectural Engineering. For an explanation of this capstone design course and its requirements click here. |
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User Note:
While great efforts have been taken to provide accurate and complete information on the pages of CPEP, please be aware that the information contained herewith is considered a work‐in‐progress for this thesis project. Modifications and changes related to the original building designs and construction methodologies for this senior thesis project are solely the interpretation of Rachel Gingerich. Changes and discrepancies in no way imply that the original design contained errors or was flawed. Differing assumptions, code references, requirements, and methodologies have been incorporated into this thesis project; therefore, investigation results may vary from the original design. |
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Building Statistics |
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Part I |
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General Building Data |
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Name:
Location:
Site: |
The Duncan Center
500 W. Loockerman Street, Dover, Kent County, DE 19904
Intersection of Loockerman Street and Slaughter Street |
Occupants:
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Bill Roth Social Security Center
Gary Linarducci Law Office
Doroshow, Pasquale, Krawitz & Bhaya Law Offices
State of Delaware Statewide Benefits Office
Coldwell Banker Commercial
Amato Associates
Ameriquest Mortgage Company
The Outlook Center
Duncan Petroleum
Super Soda Center |
Occupancy Class:
Size:
Height:
Stories: |
Business B
76,577 SF
93’-0”
6 |
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Primary Project Team: |
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Owner and General Contractor:
Construction Manager and Mechanical Subcontractor:
Architect:
Structural Engineer:
MEP Engineer:
Fire Protection Engineer:
Civil Engineer:
Geotechnical Engineer:
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Robert M. Duncan
http://www.theduncancenter.com/
Sunnyfield Contractors
No website available
Jackson Architects
http://www.jacksonarchitects.com/
Baker, Ingram & Associates
http://www.bakeringram.com/
Furlow Associates, Inc.
http://www.furlowassociates.com/
Radius
http://www.radiusservices.com/
Braun Engineering (Gerald A. Donovan Associates, Inc.)
http://www.braunengineering.net/
John D. Hynes & Associates, Inc.
http://johndhynesandassociatesinc.com/ |
Construction Start Date:
Construction End Date:
Overall Project Cost:
Additional Tenant Cost:
Project Delivery Method: |
June 2003
June 2004
$10.4 million
$46,000
Design-Build |
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Architecture |
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Architectural Description: |
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The Duncan Center is a six-story building with the first four stories of identical floorplan, for open flex office space, and a fifth floor of a smaller footprint to allow a wrap around balcony for The Outlook Center, the signature reception hall on that floor. The sixth floor penthouse holds offices for management and mechanical space. |
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The building is fitted out with some luxury items that make the building premium office space, such as an elegant entry canopy, a trickling granite fountain, lush ferns sitting on custom quarry floor tiles next to dark wood furniture, and large clear span windows allowing one to connect with the outdoors. There is also a small park in a cove of the building which has artistic iron park benches and a gravel path which courses through the flowers and greenery. |
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Model Code:
Zoning:
Historical Requirements:
| BOCA 1999
The City of Dover Office Zone Institutional and Office IO/Commercial Zone Service C3
The Duncan Center is located just outside of the Dover historic district, thus no additional building criterion was necessary. |
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Building Envelope Description: |
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The majority of the first five floors of the building have a red running bond brick façade with cold formed steel stud back-up and Le Corbusierian free band green-tinted glass windows continuously running around the perimeter of the building. The central portion of the building and the sixth floor, extending up from the ground floor lobby, has a cream colored stucco façade to stand out against the red brick, which also has cold formed steel stud back-up, and mullioned punched windows with arches on the front and back side of the building with diagonally cut windows on the other sides of the sixth floor. The roof system is a flat metal deck roof supported by cold formed steel trusses on the fifth floor and arched metal deck and trusses over the sixth floor penthouse roof. |
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Part II |
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Building Systems |
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Structural System |
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The structure of the Duncan Center is predominantly moment framed steel with a 5” thick composite slab including a 2” 20 gage metal deck and reinforced with 6x6 W2.0xW2.0 welded wire fabric that acts in conjunction with ¾” diameter by 4” long shears studs. The composite floor rests on the W16x31 joists spaced at 8’ o.c. along with the moment frame steel. The typical bays of 24’-5” x 27’-8” are formed by double angle moment connected W18x35 beams and W24x55 girders to W12x90 and up to W12x120 columns. |
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The foundation system is comprised of 16” diameter 40’ deep auger-cast piles with pile caps along with a 2’ deep grade beam system reinforced with 4-No. 6 bars on which rests the 4” concrete slab on grade with 6x6 W2.9xW2.9 welded wire fabric and steel columns. The veneer of the building is non-load bearing brick and glass panel, backed with cold-formed steel studs, which is ultimately supported by the steel frame and 12” CMU foundation walls. The roof , which includes the arched penthouse roof, is formed by of 24” o.c. cold formed steel roof trusses with Type B 20 gage galvanized metal deck, supported by W16x26 and W16x 31 perimeter beams. |
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Mechanical System |
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The mechanical system utilizes stair pressurization risers to ventilate the six story office building, which is achieved through two stairwells in the office area and one adjacent to the lobbies. The heating and cooling is controlled by heat pumps, which bring in outside air on each floor and also draw supply air from the basement mechanical room, where the boilers and 51,900 CFM cooling tower enter the system. There are typically three heat pumps, two 1040 CFM located at the exterior edge on the north and south faces of the building and one 800 CFM centrally located heat pump, on each floor. An exception to this is the fifth floor, which has five heat pumps of various sizes from 800-2010 CFM, in order to service the higher occupant loads produced by The Outlook Center reception hall. |
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Electrical System |
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The building receives its power from a 480/277 V, 3 phase, 4 wire transformer. The transformer then redistributes the current to a 1200A main distribution switchboard with breaker type overcurrent protection providing electricity to each floor by 112.5 kVA panels. In the case of a black out or electricity short out, the building is also equipped with an emergency 200kW diesel generator for the function of life safety electrical equipment and other normal building functions. |
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Lighting System |
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As the building is primarily comprised of flex office space on the first four floors, many of the lighting fixtures in these spaces were not specified to allow individual specification by the tenant. Upon observation of leased spaces, the typical lighting fixtures of choice were primarily fluorescent pendants. The lobby spaces have a combination of incandescent wall sconces with fluorescent pendant lighting operating at 277V, whereas the exterior lighting is comprised of 277V metal halide fixtures. |
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Construction Management |
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The construction of the Duncan Center took place in one quick year from summer of 2003 to summer of 2004. The project was delivered under design-build as the Owner performed as his own General Contractor on the job. |
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Transportation |
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The building has three stairwells, one on each of the North and South side of the building servicing the basement through fifth floors and in the center servicing the basement through sixth floors, which is adjacent to the lobby and across from the two elevators that service the basement through fifth floors. |
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Fire Protection |
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The building is automatically sprinkled on all floors with standpipes in the center stairwell with access at each floor, as this is the only stairwell that continues up to the sixth floor penthouse. Also, the structural system has a two hour fire rating for all steel beams, columns, girders by spray-on fireproofing, all concrete slabs, and the exterior masonry bearing walls. The roof, on the other hand, has a one hour fire rating for the cold formed steel roof trusses and metal deck. |
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Telecommunications |
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On the first floor in the entry lobby, there is a fire command center and communications hub from which the Cornell A4208 Master Station intercom system and fire sensors operate, servicing each stairwell. The intercom system also performs as an overhead paging and music sound system, which broadcasts music universally to each of the lobby areas, the elevators and stairwells, The Outlook Center, and the sixth floor penthouse. |
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