AT&T Michigan Headquarters
| AT&T Michigan Headquarters | |
|---|---|
 |
|
| General information | |
| Status | Complete |
| Type | Office |
| Location | Detroit, Michigan |
| Coordinates | 42°19′57″N 83°03′13″W / 42.3325°N 83.0536°WCoordinates: 42°19′57″N 83°03′13″W / 42.3325°N 83.0536°W |
| Construction started | 1917 |
| Completed | 1919, 1928, 1973 |
| Height | |
| Roof | 97 m (318 ft) |
| Technical details | |
| Floor count | 17, 19 |
| Design and construction | |
| Architect | Smith, Hinchman & Grylls; H. G. Christman-Burke Company |
The AT&T Michigan Headquarters is a complex of skyscrapers and buildings located at 1st Street, Cass Avenue, State Street, and Michigan Avenue in Downtown Detroit, Michigan. It contains the AT&T Building, the AT&T Building addition, the Maintenance Shop and is owned by communications giant AT&T.
The AT&T Building (formerly known as the SBC Building, the Ameritech Building and the Michigan Bell Building) was completed for the Michigan Bell Telephone Company in 1919 and expanded in 1928. It is located at 1365 Cass Avenue, and occupies the block bordered by First Street, Cass Avenue, State Street, and Michigan Avenue. The AT&T Building stands 19 stories tall. The original 7-story structure completed in 1919 was designed to accommodate additional floors as needed. Construction of the 12-story addition began in June 1927 and completed September 1928. Several horizontal bands of limestone mark the top of the original structure.
The high-rise building is used as the Michigan headquarters for communications giant AT&T. It is designed in the Art Deco and Art moderne architectural styles, using tan brick and limestone for the façade. Windows are grouped in twos divided by brick piers and have bronze spandrel panels below depicting lightning bolts, bells and other symbols related to communication. Windows on floors 17 through 19 are recessed and framed by large arches. The facade is finished by limestone balustrade and copper mansard roof.
The architectural firm of Smith Hinchman & Grylls designed both the original 7-story building, with work done by Pontiac Construction, and the 12-story addition, with construction by the H. G. Christman-Burke Company, now The Christman Company of Lansing, Michigan. The design for the 1919 building included the future addition of 12 floors. However, when Michigan Bell made the decision to construct the additional floors, the design had become outdated. Wirt C. Rowland, Chief Designer for Smith, Hinchman & Grylls, devised a new plan which resulted in a more modern look without requiring significant alterations of the original building.
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