Concrete Alliance - Virtual Tour

125 W55 Street
New York, New York

Architect: Edward Larrabee Barnes/John M.Y. Lee, P.C.
Owner: Harry Macklowe Real Estate Company, Inc.
Recipient of the Concrete Industry Board's Award of Merit

Featuring 44-ft. spans, the concrete structure has a column free interior. The structural design extended the use of the flat plate forming process, a method accomplished by utilizing light weight fiberglass forms for one-way joist construction (30 inches wide, 20 inches deep, with a 4 1/2 inch topping). Keeping all beams to the same depth of 24 1/2 inches, clear spans of up to 44 feet were able to be obtained. The 4 1/2 inch topping allowed electrical and mechanical access. Additional ribs, capable of transferring loads from interrupted joists, were also provided so that tenants could add future stairways. 125 West 55th Street is a New York City concrete commercial structure with the longest clear spans designed using conventional (not post tensioned) construction.

Photo Courtesy of Rosenwasser/Grossman Consulting Engineers, P.C.

The Concrete Alliance originated from the idea that the public will have a voice in demanding reinforced cast-in-place concrete as the material of a safer choice.

The goal of the Concrete Alliance is to educate politicians, developers, architects, engineers, insurers, and the general public about the safety benefits that a cast-in-place reinforced concrete building offers.

keywords:
safety reinforced cast-in-place concrete skyscrapers reinforced cast-in-place concrete core terrorism blast and fire resistance strength construction structure New York