Building Statistics

General Building Data

Building Name: One Christina Crescent
Building Location: 125 S. West Street, Wilmington, Delaware
Building Occupant: Barclays Bank Delaware
Occupancy Type: Corporate Offices/Retail
Size: 279,376 SF
Height: 6 stories, 88'-0" above grade
Dates of Construction: Winter 2006 to Summer 2007
Cost: $40 million
Project Delivery Method: Design-Build

Project Team

Owner: Christina Crescent, LCC
General Contractor: Pettinaro Construction Co., Inc.
CM: Pettinaro Construction Co., Inc.
Architect of Record: Mark G. Hitchcock, AIA
Design Architect: Paul Guggenberger, AIA, Moeckel Carbonell Associates, Inc.
Interior Design: Mitchell Associates
Structural Engineer: O'Donnell Naccarato Macintosh
Civil Engineer: Rummel, Klepper, Kahl LLP
Environmental Engineer: Brightfields Inc.
Geotechnical Engineer: Duffields Associates, Inc.

Architecture

One Christina Crescent is a modern office building with its curving sleek lines and aluminum/glass curtain walls, yet has elements that blend seamlessly with the surrounding historic industrial architecture. The front facade is the perfect mix of arctic blue glass and red brick veneer that makes it appear as if a modern building has been built into the remains of an industrial warehouse. The rear of the building is a full wall of glass from one end to the other, providing occupants with a spectactular view of the park plaza below. The highlight of the building is the unique steel tripod which supports one end of the building. This end comes to an acute angle of glass, providing more than 180 degrees of view from within.

The components of the building include a structural steel frame with concrete and metal deck floors. The shell of the building is comprised of a glass/aluminum curtain wall system and red brick veneer. The building features a green roof, which was retained in design even when aspirations of LEED certification faded away.

Applicable Codes

BOCA 1996

Zoning

Business (B), Mercantile (M)

Historical

One Christina Crescent is located on a redeveloped brown field site which was multi-parcel industrial wasteland. The site is part of a larger area known as 'Riverfront Wilmington' which has been revitalized by the Riverfront Development Corporation of Delaware (RDC) sind the mid 1990s. Decades ago, the area was once a thriving industrial center, but was left abandoned for many years.

Building Envelope

Foundation: Reinforced concrete grade beams and floor slab on steel/concrete filled piles
Exterior Walls: Non-load bearing metal studs with brick veneer and aluminum curtain wall system
Roof: Soil medium over polyisocyanurate insulation and TPO roofing system

Building Systems

CONTSRUCTION

The construction delivery method for One Christina Crescent was Design-Build. The owner is Boulevard Park Enterprises L.P. Pettinaro Construction Company, Inc. was the Construction Manager acting as the Constructor and had a contract with Boulevard Park Enterprises L.P. Architecture Plus, P.A., which is now the Architecture Department within Pettinaro Construction Company, Inc., prepared the architectural plans. Both Pettinaro Construction Company, Inc. and Architecture Plus, P.A. were employed by the owner in-house at 234 N. James Street, Newport, DE. The work of construction was bid out to subcontractors and prime contractors who had a contract with Construction Manager, Pettinaro Construction Company, Inc. Construction of the building was completed in the summer of 2007 with Barclays Bank Delaware currently occupying most of their rented space on floors two through six. The first floor retail space is currently being rented and stores fitted-out.

ELECTRICAL

The power company supplies power to the building at 12KV which is brought into the building from the power company's switchgear by the 3-1/c 500 KCMIL primary service feeder in 4" C with a #300 KCMIL ground. The feeder passes through a 600A/3P 12KV switch and 600A fuses before entering a 3750 KVA 3 PH. class 7420 power-dry transformer with a 12KV 3 PH. primary and 480/277V, 3 PH., 4W secondary. The main panelboard is a Square D type QED-2 metal enclosed switchgear and secondary unit substation with a 5000 amp plated copper main bus, 65,000 AIC. Sym. Power is fed through 3000A, 600V Square D "Power Zone" copper busway system to a 480/277V, 3 PH., 4W 65,000 AIC Square D 1-Line type QED-2 sub-distribution panel with a 3200A bolted copper bus. This panel feeds two other sub-distribution panels which are connected to local panels, including those for the computer room A/C units. From the 3750 KVA transformer power also passes through a 400A/3P circuit breaker on its way to a jockey pump controller and combination fire pump controller and automatic transfer switch. Power continues on to a 1000A MLO 480/277V 3PH, 4W 65,000 AIC sub-distribution panel connected to a 500KW/625KVA 277/480V, 3PH, 4W natural gas emergency generator. The feeder passes through an 800 amp automatic 4 pole transfer switch before being fed into an 800A MLO, 480/277V, 3PH, 4W 65,000 AIC sub-distribution panel. Power is then distributed to panels for elevator equipment, fans, and stepped down to 208Y/120V for local panels. In addition, power travels from the 3750 KVA transformer to a 600A MLO, 480/277V, 3PH, 4W 65,000 AIC sub-distribution panel. From there power goes to 480V primary, 208Y/120V 3PH 4W secondary transformers and local panels, HVAC equipment, a 400A MLO 480/277V 3PH 4W 65,000 AIC sub-distribution panel serving HVAC equipment and a sub-distribution panel serving the air handlers.

LIGHTING

2X4 and 2X2 recessed fluorescent indirect fixtures with low gloss matte white finish and perforated side baskets are typical for ambient lighting in the open office areas. The 2X4 fixtures have (2) 32 watt T-8 lamps and the 2X2 fixtures have (2) 40 watt biax lamps. 9" diameter recessed flourescent downlights with  (1) 26 watt quad tube, clear disc, decorative trim, and a 277V Lutron Hi-Lume dimming ballast are also typical in the open office areas. These fixtures are mostly found around the core where the soffit is lower and in second floor corridors. Recessed fluorescent downlights with (2) 13 watt and (2) 26 watt compact lamps can be found in areas throughout the core of the building on all floors. Pendant mounted fluorescent direct fixtures with a 54 watt T-5 HO lamp provide ambient light in the conference rooms. White encapsulated LED lamps provide a decorative touch to the ceiling soffits in the lobby and second floor auditorium. 6" diameter metal halide fixtures with 50 watt lamps provide ambient light in the first floor lobby and pendant mounted fixtures with a 25 watt compact fluorescent lamp illuminate the elevator lobby. The highlight of the building with respect to lighting is the spectacular fixture that is created from 9 individual fluorescent pendants with (2) 54 watt T-5  lamps each hung together from the two story lobby ceiling.

MECHANICAL

Two heat recovery units in penthouse that are both Innovent model RHXC-1D/SP-25000-CW/HW 25,000 CFM max. There are two 425 Ton, 0.605 KW/Ton Trane CVHE-425 water chillers with Wye-Delta starter marine type evaporator and condensor water boxes, ICS controller and HCFC 123 refrigerant charge. In addition, there is one 55 ton, 1.2 KW/Ton Trane CDAFC6 water chiller with an air cooled condensor, neoprene isolators, unit controller and a communications interface module. There are two Bryan RV300-W natural gas fueled heating/hot water boilers with 30 PSI water pressure drop. The boilers are Bryan forced draft flexible tube boilers, ASME maximum W.P. = 160 PSI. Two 850 ton induced draft cross flow cooiling towers. Baltimore air coil two-cell, model 3379A-2 with control panel. Alfa Laval plate heat exchanger model #M15M-FG 4053 KBTU/Hr. There are ten Trane M-series air handlers, sizes 57,80,and 66, on floors two through six feeding variable volume boxes with heating coils and parallel fan powered boxes. The air handlers have ratings ranging from 22,750 to 41,000 CFM max.

STRUCTURAL

The foundation consists of 8" normal weight concrete slab on gade w/ #8 @ 12" o/c E.W. top and #7 @ 12" o/c E.W. bottom. Grade beams are reinforced concrete ranging in size from 12"X24" to 36"X36".  2 1/2" lightweight concrete on 3" 18 GA. LOK-Floor composite deck with 6X6 - W1.4X1.4 WWF is typical floor construction on floors 2-6. Roof consists of 3" 20 GA. Wide rib galvanized metal roof deck on wide flange steel beams.

FIRE PROTECTION

A complete automatic wet-type sprinkler system is installed for the heated portion of the building in accordance with NFPA 13, BOCA and local fire codes. A class 1 standpipe system consisting of a minimum of 4" diameter standpipe is provided in each of stairs #1,#2, and #3 in accordance with the requirements of NFPA 14. A fire-pump/jockey pump system is installed in accordance with NFPA 20. Stairs, elevator hoist ways, and exit corridors all have a 2 hour fire resistance rating. Shafts, the fire command center, tenant separation walls, structural members, and floor and roof construction all have a fire resistance rating of 1 hour. A fire alarm system with voice evacuation is installed in accordance with NFPA 101, Chapter 30, the Delaware State Fire Prevention Regulations and NFPA 12.

TRANSPORTATION

There are six Otis Gen 2-4000H, overhead machine room traction passenger elevators serving floors one through six. These elevators are rated for 4000 pound capacity and travel at a rate of 350 ft/min. The operation system is an Otis Elevator Company Gearless Permanent-Magnet Machine with Elevonic control system. In addition, there is one Otis Gen 2-5000H , overhead machine room traction freight elevator serving floors one through six. This elevator is rated for a 5000 pound capacity and travels at a rate of 350 ft/min.  The operation system is an Otis Elevator Company Gearless Permanent-Magnet Machine with Elevonic control system. All elevators operate on 208 volts, 3 phase, 60 Hz power.

TELECOMMUNICATIONS

A system of conduits, terminal boxes, outlet boxes, junction boxes and other necessary accessories for telephone outlets as indicated on the drawings, or as required by Barclays was constructed with the building and left complete and ready for Barclays, who installed their own wire and epuipment.