The "shaft" of the tower spans the third through 28th floors. The southern facade of the tower contains windows only above the 11th story, and the eastern facade contains windows above the 12th story, because the former east wing was located below these floors. On each floor, the "shaft" contains three sets of three windows per side, except on the 25th through 27th floors, where the building's clocks are located. On these floors, there are two paired windows on the outer edges of the tower. The 29th and 30th floors serve stylistically as "transitional stories", with ten windows per side on each floor; the 29th floor contains a single arrangement of 10 windows, while the 30th-floor windows have been divided into five pairs. This is largely the same arrangement as the original, except that in LeBrun's design, the "shaft" comprised the sixth through 30th floors.