360 Madison Avenue, completed at a cost of $65 million, was unusual because it combined a renovated old building with a completely new one. The old building was located on the same Madison Avenue lot as the current structure. It was a 120,000-sq.-ft. steel structure originally built in 1910 as a stone-clad Abercrombie & Fitch department store. In the 1970s it was relaunched with a reflective glass curtain wall and turned into an office building.

For the current projet, the old building was stripped to its steel frame and the original 17-floor frame extended to 23 stories. The adjacent building was demolished and replaced with a new 26-story tower with a concrete superstructure.

Richard Cook & Associates, Architects - working closely with structural engineer Jacob Grossman, a principal with Rosenwasser/ Grossman Consulting Engineers PC of New York City, combined the two into a new 355,000-sq.-ft. office building with a distinctive white painted aluminum and glass façade.

The steel and concrete superstructures were constructed a foot apart and the floors of the concrete building were built about a tenth of an inch higher than the steel floors, to allow for shrinkage of the concrete and to provide a level floor space between the two joined structures so as the new building settles, it will remain as level as possible. The 1-ft. separation between the buildings will allow for an additional leveling of floors.The two buildings are intertwined because the developer wanted a large footprint for the office space.

Another issue is the seismic code requirement for New York City. Normally, this requirement would affect the new building only. But by enlarging the footprint and joining the two structures, additional seismic forces were created requiring the potential need for a seismic isolation joint to separate the two structures. However, the developer did not want a seismic joint between the two buildings because it would have created, in effect, two separate buildings. The solution provided by Rosenwasser/Grossman was to build the new building using concrete to support additional forces which the existing building could not sustain on its own.

Case Studies:

Cultural Buildings
Educational Institutions
Green Buildings
Healthcare
Hospitality
ICF Buildings
Luxury Residential
Mixed Use
Office Buildings
Religious Structures
Tilt-Up Buildings

Owner/Developer: Madison 45 Co., NYC Architect: Richard Cook & Associates, NYC Structural Engineer: Rosenwasser/Grossman Consulting Engineers, NYC MEP Engineer: Jaros, Baum & Bolles, NYC Curtainwall Contractor: Permasteelisa Cladding Technologies, Windsor, Conn. Structural Steel Fabricator & Erector: ADF Steel Corp., Montreal, Canada Concrete Contractor: Carlton Concrete Corp., Floral Park, N.Y. Excavation & Foundation Contractor: Civetta Cousins JV, Bronx, NY General Contractor: Pavarini McGovern Construction Co., NYC

 
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