The zoning envelope
New York’s 1916 zoning resolution: a street wall limited to a multiple of the street width, planes sloping back from the street centre, and a tower of any height on a quarter of the lot.
The rules it illustrates
Setbacks behind a sloping plane. At the street line a building may rise to a multiple of the street’s width; above that it must stay behind a plane drawn from the centre of the street, stepping back as it rises.
A tower on a quarter of the lot. Over one quarter of the lot area, a tower may rise to any height, free of the setback planes.
Where it appears in the book
In the styles Art Deco.
In the chapters The Modern Movement.