Geisinger Gray's Woods Ambulatory Care Campus Phase I

Patton Township, Centre County, Pennsylvania

Outpatient services, OB/GYN practice, Pediatrics, Family Medicine, Urology, Cardiology, Ophthalmology

64,350 SF

Two [above-grade]

Alexander Building Construction, LLC [www.alexanderbuilding.com]

gfSweetland Engineering and Associates, Inc. [www.sweetland-eng.com]

sdsghjvvApril 23rd, 2007 through June 6th, 2008 [substantial completion]

$17 Million [building]

Construction Management

cre2003 IBC, 2003 ICC, 2003 IMC, 2003 IFGC, 2003 IPC, 2003 IFC, 2003 IECC, 2003 IPMC, 2003 IPSDC, 1998 American National Standard for Accessible and Usable Buildings and Facilities, 2000 Life Safety Code

With Alexander Building Construction, LLC as Geisinger’s Construction Manager, all subcontracts (excluding the elevator contractor) through the CM.  By utilizing a Cost Plus contract with the CM, all savings will revert back to the owner although the owner is responsible for any costs over the budgeted amount.  No bondage is being used on this project and the CM and subcontractors must all carry the standard insurance policies – workman’s comp., general liability, automobile, etc. Building construction began on April 23rd, 2007 with the substantial completion date set for June 6th, 2008.  The main components (foundation, steel, interiors) of the project will be completed in three phases.  The building is broken into three divisions from East to West. Prefabricated steel foundation formwork was provided by the concrete subcontractor.  A 150 ton Crawler Crane was used for steel erection on site.  Additional steel supports were required for the curtainwall system during construction.  With an exterior facade of EIFS and masonry, scaffolding will be necessary for installation.

A 1000A, 480/277V underground service in a concrete reinforced ductbank through Allegheny Power will be provided for Geisinger Gray’s Woods to a 1000A, 480/277V Service Switchboard to serve all Main Building loads as well as space and spares for future 3rd floor loads.  Electrical rooms are provided on each floor to house electrical distribution equipment.  A 208/120V distribution will be used for appliance loads while a 480-208/120V transformer will be provided on each floor to serve the appliance panels. The 250 kW emergency generator will be outdoor packaged.  This generator will serve a 400A, 480/277V Emergency Main Switchboard located in the Main Emergency Electrical Room. The main emergency electrical room on the first floor will also house a 150kVA modular UPS Emergency Power and equipment. Electrical distribution will use copper conductors, wiring devices will be hospital grade and receptacles will be tamper-proof.  Additionally, transformers will be type TP-1 energy saving while emergency wiring will be installed in metallic conduit.

The lighting system consists or T8 lamps, compact fluorescents, electronic ballasts and occupancy sensors.  Daylight harvesting in perimeter glazed building spaces was also considered in the design.  The atrium area will use long life lighting sources (induction fluorescent and metal halide).  Site lighting will be metal halides.  Design also strived to avoid night sky pollution through the use of full cutoff luminaries. In offices and conference rooms, dual technology occupancy sensors will be used as well as in bathrooms to reduce energy consumption.  However, in common spaces, a relay based lighting control system with local override control will be installed

On the North-West corner of the building, a boiler/chiller building will house a boiler, chiller, pumps, and space for future equipment.  The design of the boiler/chiller building is to support the first 3 phases of the project.  Additionally, there are 3 rooftop units that include an economizer cycle.  Distribution for the VAV (variable air volume) system is through ductwork that includes single duct VAV boxes and hydronic reheat coils.  Return air is through the plenum ceiling.  For LEED certification, the system is designed for demand control ventilation and heavily commissioned.  LEED credits for “Optimize Energy Performance” and “Carbon Dioxide Monitoring” have been included.  The system also incorporates a stand alone DDC control system with a workstation in the boiler/chiller building.

A shallow foundation system of pier footers, grade beams and a slab-on-grade was designed to support the 2-story, 64,350 SF Geisinger Gray’s Woods building.    Pier footings are spaced on an approximately 30’ by 30’ grid.  The footers range from 6’ by 6’ to 17’ by 17’ in size and the deepest footing is 3’ thick.  All of these elements are to be cast-in-place concrete and require a minimum design strength of 3,000 psi (slabs) to 4,000 psi (foundation).  Grade 50 ASTM A992 structural steel creates the skeletal system for the building.  Column sizes range from W10x39 to W10x77 while the typical steel beam size is W16x26.  Bracing along four grid lines, running East-West and North-South, occurs both on the exterior of the building and through interior column lines.  HSS steel tubing provides inverted ‘V’ bracing with gusset plate welded connections to beams and columns. Exterior facades are supported by 6” structural metal studs.  The second floor is comprised of a 3 ¼” lightweight cast-in-place concrete slab on 2” composite metal decking and is reinforced with welded wire fabric.  Similarly, the majority of the roof is comprised of a 3 ¼” lightweight cast-in-place concrete slab on 2” composite metal decking and is reinforced with welded wire fabric.  The rest of the roof consists of a metal roofing system and skylights supported by structural steel W8x18 and 6” metal studs.

The lighting system consists or T8 lamps, compact fluorescents, electronic ballasts and occupancy sensors.  Daylight harvesting in perimeter glazed building spaces was also considered in the design.  The atrium area will use long life lighting sources (induction fluorescent and metal halide).  Site lighting will be metal halides.  Design also strived to avoid night sky pollution through the use of full cutoff luminaries. In offices and conference rooms, dual technology occupancy sensors will be used as well as in bathrooms to reduce energy consumption.  However, in common spaces, a relay based lighting control system with local override control will be installed