Building Statistics

• Building Name: Roosevelt Island Southtown Building No. 5
  
  
• Location and Site: 415 Main St., Roosevelt Island, New York, NY
  
  The project site is located in the center of Roosevelt Island. An island located off of Manhattan’s East coast in the East River. The building is located just north of the Queensboro Bridge between Southtown Building No. 4 and Southtown Building No. 6.
  
  
  
  
  
• Building Occupant Name:  The building is jointly owned by the Hudson Companies and the Related Companies.
  
  Roosevelt Island Southtown Building No. 5 is the 5th building in a large scale new development. The building will have a 123 luxury apartments consisting of 1,2 and 3 bedrooms. It will also house a full service health club, a children’s day care center and additional occupant storage.
  
  
• Size:  The overall building is estimated to be a total of 130,000 sq. ft.
  
  
• Number of stories above grade/ total levels:  The building is 16 stories above ground with a one story cellar below grade. The building is a total of 17 stories with an elevated Mechanical, Electrical, and Plumbing room as well as an elevated Elevator Mechanical Room.
  
  PRIMARY PROJECT TEAM:
  
  
• Building Owner: The Hudson Companies, The Related Companies
  
  
• Architect: Costas Kondylis and Partners LLP
  
  
• Structural Engineer: DeSimone Consulting Engineers, PLLC
  
  
• Mechanical, Electrical, Plumbing: T/S Associates Mechanical Consultants
  
  
• Interior Designer: Kondylis Design
  
  
• General Contractor/CM: Monadnock Construction, Inc.
  
  
• Dates of Construction:  Start - June 2007 ; Completion - October 2008
  
  
• Cost Information: Approxinately $52,000,000
  
  
• Project Delivery Method: Guaranteed Maximum Price
  
  ARCHITECTURE:
  
  
• Design and Functional Components:
  
  Southtown Building No. 5 is a luxury apartment building located on the center of a long narrow island. It offers a variety of apartment layouts and bedroom sizes ranging from studio to 3 bedroom apartments.
  
  On the first floor, the building has a full service lobby with concierge service and mail room, a health club, multi-purpose room, children’s play area, building storage, and three 2-bedroom apartments. The building has 120 additional luxury apartments in the 15 floors above on all 4 sides of the building to maximize the views and sights of Manhattan’s skyline.
  
  On the Main Roof, the building offers an enclosed Party room to host gatherings and social events. Additionally, private terraces surround the exterior of the main roof. Above the main roof is the bulkhead mechanical room followed by the elevator machine room to top off the building.
  
  
• Major National Model Codes:
  2003 International Building Code
  Building Code of the City of New York
  The New York City Seismic Code
  ASHRAE
  
  
• Zoning: The building is located on Roosevelt Island and follows the zoning restrictions and requirements of the Master Plan of the New York State Urban Development Corporation.
  
  
• Historical Requirements of Building:
  
  According to the General Development Plan, Roosevelt Island was designed (1969) for 5000 housing units and 20,000 residents. Commercial and community services would be fully integrated into the Island, as well as parks, open space, and historical structures.
  
  The Southtown project would see the creation of 2000 new apartments, with 400 units constructed in each phase. Building No. 5 is the 5th out of nine apartment buildings that will be constructed in this development plan.
  
  
• Building Envelope:
  
  Facade: The building envelope of Southtown Building No. 5 primarily consists of window walls. A section of wall through a pier consists of 5/8” Gypsum Board finish, 1-5/8” Metal Studs backed by 3-1/2” foil-faced mineral wool blanket insulation and 6” C.M.U. The façade of the building consists mainly of a brick cavity wall. However, the base of the building has 4’ of granite clad precast panels, followed by a two stories of a composite stone cavity wall. The windows in the façade are aluminum casement windows with 1” vision glass.
  
  Roof: The roof of the building is enclosed by a poured in place concrete parapet wall with an exposed surface that is treated with a cementitious water repellant coating. At the top of the parapet is a prefabricated aluminum coping with a painted finish set with anchor cleats and splice plates. The main roof consists of precast concrete pavers on 3-1/2” thick rigid insulation over a waterproofing membrane all atop a 2” concrete topping.  The roof above the Elevator Maintenance Room is a 2” thick crushed gravel ballast on 3-1/2” rigid insulation over a waterproofing membrane.
  
  Structural: The foundation of the structure is composed of a 12" reinforced concrete foundation wall around the perimeter, varying size spread footings under each column, and a 42" thick mat foundation under the lateral force resisting shear walls. The superstructure of the building is typically an 8" reinforced concrete flat plate floor slab supported by interior and perimeter reinforced concrete columns and shear walls. Reinforced concrete shear walls make up the lateral force resisting system of the building. The elevator and stairwell core in the center of the building have been assigned as the location of these shear walls.
  
  Electrical/Lighting: Power for this building is supplied via a 208/120V, three phase, four wire feeder to a 4000 amp main electrical switchboard. All apartments have 125 amp, 208 volt, and single-phase panels. A combination of down lights will provide lighting to the apartment units while wall scones and fluorescent fixtures service the public areas of the building.
  
  Mechanical: The heat source for the building's residential units consists of two (2) 250-hp natural gas fired steam boilers with instantaneous domestic hot water coils rated at 10,461 MBTU. A 12- ½ ton capacity gas fired package heating and cooling rooftop HVAC unit services the corridors. Two (2) ceiling mounted package AC system with hot water duct steam and reheat coils service the lobby. Each residential room (living room and bedrooms) have an incremental unit (P-TAC unit) – ranging from 12,100 – 16,030 BTUH cooling capacity and 26,300 BTUH heating capacity.
  
  Plumbing: A new 4" domestic water service will be provided from the existing 4" stub and a new 6" wet tap for the fire pump. The water supply pressure will be boosted with a 100 gpm constant pressure Triplex house pump, with a remote 158 gallon tank. The hot water supply lines will be recirculating and the low hot water zone will be HWAT electric heat trace as required.
  
  Fire Protection: The entire building is sprinklered for fire suppression. The fire line shall feed a 500 gpm automatic fire pump via a 6" backflow preventer and galvanized steel piping.
  
  Telecommunications: Each individual unit is equipped with an intercom system which works along with the condo unit phone system to deliver intercom and door opening capabilities. Additionally, each unit will be pre-wired for telephones, cable, and high speed internet.
  
  Vertical Transportation: There is one passenger elevator and one passenger/service elevator that service all floors. Additionally, there is two sets of concrete stairs located within the building that will also serve the cellar floor to the roof.