Frank Duffy, cofounder of British design firm DEGW (Brand notes "He's the 'D'"):
"Our basic argument is that there isn't such a thing as a building. A building properly conceived is several layers of longevity of built components"
his Shell, Services, Scenery and Set is modified by Brand into Site, Structure, Skin, Services, Space Plan, and Stuff
Brand's "Structure" gently steps away from Duffy's "no such thing as a building": ("The foundation and load-bearing elements [...] are the building")