This latest type of modern administration building "for either public or private affairs" has its source in the first sketches for " L' Esprit Nouveau" in 1919. Until 1930 proposal for skyscraper was cruciform-radiating light and stability.
The occasion being furnished to push the study further, it was seen that with this form symmetrical about two axes, the cruciform skyscraper does not receive sunlight on its north facades. In principle the essence of the cruciform plan (with two axes) does not adopt itself to the essence of the path of the sun, which has only one axis.
As a result, a new form was introduced: the "chicken-claw" form. With this everything became more alive, more true, more harmonious, more supple, more diverse, more architectural.
Cases for its application were found in the plans for Anvers-Rive-Gauche, Barcelona, Buenas Aires, Manhattan, etc.
Such a form and its dimensions become a true urbanistic work, the fruit of modern techniques. The innovation right from the start was to oppose the purely formaland romantic conceptions of American skyscrapers (with their pyramidal forms and needle-like terminations).
