| United Steelworkers Building | |
|---|---|
 The building in 2019 | |
 | |
| Former names | IBM Building |
| Alternative names | I.W. Abel Building, Five Gateway Center |
| General information | |
| Type | Office |
| Location | 60 Boulevard of the Allies |
| Town or city | Pittsburgh, Pennsylvania |
| Country | United States of America |
| Coordinates | 40°26′22″N 80°00′20″W / 40.4394°N 80.0055°W |
| Groundbreaking | December 5, 1961[1] |
| Topped-out | November 8, 1962[2] |
| Opening | March 19, 1964[3] |
| Cost | $5 million[5] |
| Owner | United Steelworkers |
| Height | 172 feet (52 m) (estimated)[4] |
| Technical details | |
| Floor count | 13 |
| Design and construction | |
| Architect(s) | Curtis and Davis |
| Developer | Equitable Life Assurance Society |
| Structural engineer | Worthington, Skilling, Helle & Jackson |
| Main contractor | George A. Fuller Co. |
IBM Building | |
| Part of | Pittsburgh Renaissance Historic District[6] (ID13000252) |
| Significant dates | |
| Added to NRHP | May 2, 2013 |
| Designated PHLF | 2014[7] |
The United Steelworkers Building, originally named the IBM Building and also known as the I.W. Abel Building or Five Gateway Center,[8] is a highrise office building in Downtown Pittsburgh, Pennsylvania. It was built by the Equitable Life Assurance Society in 1961–64 as part of the Gateway Center project which redeveloped a large portion of the area known as the Point. The building is listed on the National Register of Historic Places as a contributing property in the Pittsburgh Renaissance Historic District[6] and has been designated as a Pittsburgh landmark by the Pittsburgh History and Landmarks Foundation.[7]
The building was designed by Curtis and Davis, a New Orleans-based architecture firm, with structural engineers Worthington, Skilling, Helle & Jackson. The design of the building, featuring a load-bearing steel diagrid exoskeleton, was highly unusual at the time and helped pioneer the use of diagrids and framed tube construction.
- ^ "IBM Breaks Ground For Gateway Office". Pittsburgh Press. December 5, 1961. Retrieved April 22, 2021 – via Newspapers.com.
- ^ Thomas, George (November 9, 1962). "Ceremony 'Tops' IBM Building". Pittsburgh Press. Retrieved April 22, 2021 – via Newspapers.com.
- ^ "IBM Building Dedication Set". Pittsburgh Press. March 17, 1964. Retrieved April 22, 2021 – via Newspapers.com.
- ^ "United Steelworkers Building". Emporis. Archived from the original on December 8, 2015. Retrieved April 22, 2021.
- ^ "New IBM Building Unusual Inside, Too". Pittsburgh Post-Gazette. January 11, 1964. Retrieved April 22, 2021 – via Newspapers.com.
- ^ a b "National Register of Historic Places Registration Form: Pittsburgh Renaissance Historic District" (PDF). National Park Service. May 2, 2013. Retrieved April 22, 2021.
- ^ a b Historic Landmark Plaques 1968–2014 (PDF). Pittsburgh: Pittsburgh History & Landmarks Foundation. 2014. p. 19. Retrieved April 20, 2021.
- ^ Jensen, Edward (February 19, 1964). "U.S. Steel Balks Over Name". Pittsburgh Post-Gazette. Retrieved April 26, 2021 – via Newspapers.com.
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