escalier tournant

OBS: Dans la partie tournante de l'escalier, les marches peuvent être plus ou moins étroites. Les marches rayonnantes sont plutôt étroites, tandis que les marches balancées s'élargissent dans la partie tournante.

CONT: A winding staircase is characterised by the opening in the center of the staircase. Therefore, a winding staircase is not supported by a centrally located column, but instead by an inner beam.
OBS: The curving of a staircase is a European technique that consists of dividing the steps in such a way as to provide a progressive and balanced turn that makes for a comfortable pace. When a stairway has both a straight part and a rotating part, it is typical to curve the steps, that is, to make several of the straight steps progressively oblique.