American Radiator Building

A typical floor plan of stories twelve through fifteen. There are many windows on all four sides of the skyscraper. Th floor space is mostly open, with just two small columns in the center. Tucked against the left wall are the service areas such as the elevator shafts, staircases, and restrooms.

Floor plans of the penthouse and the roof levels. The plan of the penthouse in the lower half shows areas for stairs, a corridor, and a fan room. The plan is roughly square, with small rounded bays at each corner. The plan of the roof shows a central water tank and a spiral staircase. The plan is roughly square, with small round turrets at each corner.

From Architectural Record, May 1924

The building was not only popular with the general public, but also among architects. Though some took issue with the unusual use of black brick, many recognized the logic and ingenuity of the interior layout.

Rather than placing them at the center, Hood concentrated the elevators, stairs, and service areas off to one edge, leaving the bulk of each floor open to a flexible arrangement and suffused with much-desired natural light and ventilation.