The floors were arranged so that the elevator banks and stairs were on the eastern side of the building, while the offices were concentrated along the western side and on the north and south wings. There were four staircase shafts that extended the height of the building. In addition, 33 elevators were provided in the initial construction, though this number was later expanded to 37. Of the original elevators, 32 were accessible from the lobby. Most of the elevators from the lobby traveled only to the 25th story, where a separate elevator connected the 25th through 37th floors. During the 1934 elevator replacements, eight of the elevator shafts were shortened to make way for office space. Because the basement is mostly taken up by the subway station, the mechanical equipment is located on the fourth floor. The elevators were controlled by a dispatching room on the 26th floor.