St. Helen's, Office skyscraper in City of London, United Kingdom
St. Helen's is an office skyscraper in the City of London with 28 floors and a distinctive steel frame design. The structure features a central concrete core surrounded by a suspended steel framework that maximizes usable office space.
The building was completed between 1968 and 1969 as part of the City's postwar development. Following damage from the 1992 Baltic Exchange bombing nearby, it underwent extensive restoration and repairs.
The structure incorporates design elements influenced by Ludwig Mies van der Rohe, particularly resembling New York City's Seagram Building with its geometric form.
The main entrance is located on Leadenhall Street at 1 Undershaft. Underground levels contain restaurants and storage facilities serving the office workers in the building.
The building won the Civic Trust Award and the Structural Steel Design Special Award in 1970 for its innovative top-down construction method. This engineering approach allowed the structure to be built with exceptional efficiency.
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