A revolving door typically consists of three or four doors that hang on a central shaft and rotate around a vertical axis within a cylindrical enclosure. Revolving doors are energy efficient as they prevent drafts, thus preventing increases in the heating or cooling required for the building. At the same time, revolving doors allow large numbers of people to pass in and out.
Read more about Revolving Door: Construction, Security, As A Fire Exit, History, Research
Famous quotes related to revolving door:
“The word ‘revolution’ itself has become not only a dead relic of Leftism, but a key to the deadendedness of male politics: the ‘revolution’ of a wheel which returns in the end to the same place; the ‘revolving door’ of a politics which has ‘liberated’ women only to use them, and only within the limits of male tolerance.”
—Adrienne Rich (b. 1929)