The Gucci Flagship Store in Manhattan.

Gucci Flagship Store



The Gucci building at the corner of 5th Avenue and 54th Street consists of a new concrete-framed structure attached to an existing steel-framed structure to create a single mixed-use building of 22 stories and 100,000 square feet. The project included a complete interior gut renovation and exterior façade rehabilitation of the existing structure including seismic retrofit of the existing façade elements.

The lower retail floors of the combined building serve as the home of the Gucci New York flagship store while the upper floors have Class A office space used by both Gucci and outside tenants. The new portion of the structure, which includes both moment frames and shear walls, was designed to resist all wind and seismic loadings for the entire building. Concrete flat-slab construction was chosen for the new structure to maximize ceiling heights.

A major challenge in combining a new building with an old structure is the existing field conditions. Constructed in the 1920s, there was limited documentation available for this structure, which required the engineers to conduct test probes in order to recreate the construction of this existing structure. The use of cast-in-place concrete gave the designer greater flexibility when dealing with the unknown conditions of the original structure, thus creating a unique “marriage” by uniting the new concrete frame to the existing steel beams and columns.

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