To convince you of the value of hunting down this resource, let us summarize the "Floor" chapter. Koolhaas argues that the floor is the most abused element of architecture. We walk on it, yet we ignore it. The PDF traces the floor from the cocciopesto (Roman crushed tile) to the 1980s office carpet tile (a "disaster of beige"). He points out that the invention of raised access flooring (the hollow floor for cables) destroyed the psychological permanence of the ground. Suddenly, the floor became a plug-in device.
Rather than focusing on famous architects or grand movements, Koolhaas and his research studio, OMA/AMO , dissect the "fundamentals" of construction. The project explores the global history, technological evolution, and political influence of 15 essential elements: : Stairs, escalators, and elevators. The Envelope : Façades, windows, balconies, and roofs. rem koolhaas elements of architecture pdf
If you are looking for specific info from the text, let me know: To convince you of the value of hunting