TELEPHONE SYSTEM OF THE UNITED STATES 



29 



some of the recent combined equipment and office buildings for large 

 cities. 



The objective in connection with buildings of all types, including 

 equipment and office buildings, garages and warehouses, is to provide 



Fig. 23 — Combined equipment and office building at Detroit, Michigan containing 

 headquarters of the Michigan Bell Telephone Company. 19 stories, 28,000 square 

 meters of floor space. 13 floors arranged for equipment including toll board and dial 

 equipment to serve 60,000 telephones. 6 floors are arranged for offices. 



