Nicholas J. Hagan
Dr. Donghyun Rim
Building Statistical Data
General Building Information
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Building name – Bedford Medical Office Building (MOB)
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Location – 52 Leavy Drive, Bedford, NH
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Owner – Elliot Health System
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Occupancy/function – Medical Outpatient Building
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Size – 57,000 sf
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Height – site is sloped, 3 total floors (3 on the south and 2 on the north)
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Architect for Shell/Core – Lavallee Brensinger
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Architect for fit-out – Environments for Health
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Structural – Foley Buhl Roberts & Associates
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Civil – TFMoran, Inc
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MEP – BR+A
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General Contractor – AW Rose Construction
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Dates of construction (start – finish) –November 2016 to December 2017 (fit out of 2nd floor is ongoing)
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Construction Cost – $11 million all in (shell and core, plus fit-out)…roughly $200/sf
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Project delivery method – design build
Architecture
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The Architectural design resembles that of the many colonial homes located throughout New England. The exterior design uses a typical 6” vinyl siding with asphalt shingles. Though the shell looks like an exterior of a residential home, the building functions as medical outpatient building.
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Including but not limited to a CTE scanner, blood labs, mammography, X-rays, etc.
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Major national model code/s – Refer to G-001: IBC 2009, NFPA 101-2003, NEC 2008
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Historical requirements – Not Applicable
Building Enclosure
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Historical requirements – Not Applicable
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6" Vinyl siding
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Major national model code/s – Refer to G-001: IBC 2009, NFPA 101-2003, NEC 2008
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Typical wall types shown below
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Window legend and Elevation shown below
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Roof plan and legend shown below
Roof Materials
Window Samples
Exterior Wall Types
Mechanical System
Bedford Medical Outpatient Building utilizes 6 rooftop air handling units to supply min 33% OA to 6 zones, 2 zones per floor. Supply air is returned to the respective AHU to recover heat before it is exhausted. Each AHU is equipped with a 0-100% Economizer with Demand Control Ventilation (DCV), and a Traq flow sensor to monitor the OA and RA to create the most economical way of conditioning the air while utilizing the heat recovered from the RA. The ground floor area is half that of the first and second floor. The required tons of cooling is also half that of the above two floors. The RTU are sized accordingly with the 4 AHU’s serving the first and second level sized at 50 tons, and the 2 AHU’s serving the ground level are sized at 40 tons. The additional load on the ground level is a direct result of the cooling load from the mechanical and electrical equipment. A gas fired boiler is located in the mechanical room and supplies the heating coils of the roof, along with perimeter heating (radiant panels). Refrigerant R410A is used to distribute heat from the boiler with a plate and framed heat exchanger in the basement to transfer heat from the water system in the boiler to the refrigerant system.
Structural System
The main super structure of the building consists of structural steel columns, beams, and flanges with wooden trusses used for joists and wall framing. Floors are composed of wooden floor sheathing on Wooden trusses supported by wide flange beams. Typical office floor girders are a W 14x22, while the typical girders are 24” deep trusses spaced at 24” o.c. Column sizes range from W14x61s to W14x605’s. The foundation system of Bedford MOB consists of drilled concrete piers ranging from 18”x18” to 24”x24” drilled into bedrock. Concrete piers are spaced on an approx. 20’ x 25’ grid. The lateral force resisting system of Bedford MOB is a combination of shear walls and braced framing with moment resisting connections.
Electrical/Lighting
All lighting fixtures in Bedford Medical Outpatient Building are LED, which is the most energy efficient lighting available today. The utility voltage is dropped by an external transformer to 277/480V. Should the power go out, a 300KW emergency generator supplies 277/480V to the main electric panel to continue normal building operations.
Construction Management
This project was split up into two separate packages using two different architects. The first package contained the core and shell of the building. This included the structural system, open floorplans, and the building enclosure. The second packaged contained the floor plans, mechanical system, electrical, fire protection, plumbing, transportation, telecommunications, and so on. The project was also split into two phases, the ground and first levels were completed first with a occupancy date of December 2017, and the second floor fit-out was completely while the first and ground floors were in use by the occupant, and set to be completed by January 2019. The entire project was a design bid build owned by Elliot Health System.
Fire Protection
The active fire protection system uses a wet pipe sprinkler system fed by the ETR fire pump located on the ground floor in the central stairwell. The electrically powered fire pump is supplied water from the water room (0024) and distributes water to the branch sprinkler heads. Based on the hazard level a required GPM/sf is supplied to each sprinkler head. Light hazard areas (offices, exam rooms, hallways, and lobby) require 0.10 GPM/sf and ordinary hazard group 2 (soiled janitor closets, and storage rooms) require 0.20 GPM/sf. In areas with ceilings a quick response recessed pendant is installed. In areas without ceilings a quick response upright sprinkler is installed. Passive systems include fire rated piping and duct work when penetrating walls. Code requires a 2-hour fire rating for wall penetrations.
Transportation
2 Passenger Elevators are located side by side at the center of the building.
Elevator 1 and 2 include self-contained emergency battery power supply for elevator lowering and car lighting. Upon transfer to battery power, elevator is moved to the Main Floor landing, the car is stopped, doors are opened, all operating circuits are disabled, and the elevator car is held in standby condition.
Telecommunications
Not Available