Abstract: A step for modular staircases, preferably produced by molding using a thermoplastic technopolymer, comprises at least a main body (11) and a spacer (12). The main body (11) comprises at least a tread surface (Ha) and a hollow portion (lib) extending vertically with an internal thread (111), while the spacer (12) has an external thread (121) matching that of the hollow portion (lib) of the main body (11), allowing the spacer (12) and the hollow portion (lib) to be screwed together. The hollow portion (lib) and the spacer (12) also have ends (112,122) which do not interact, shaped to match one another, to allow vertical stacking of two or more steps (10), thus obtaining a modular staircase (1), complete with a landing (20) produced in a similar way to the step (10).

Abstract: A step for modular staircases, preferably produced by moulding using a thermoplastic technopolymer, comprises at least a main body (11) and a spacer (12). The main body (11) comprises at least a tread surface (Ha) and a hollow portion (lib) extending vertically with an internal thread (111), whilst the spacer (12) has an external thread (121) matching that of the hollow portion (lib) of the main body (11), allowing the spacer (12) and the hollow portion (lib) to be screwed together The hollow portion (lib) and the spacer (12) also have ends (112,122) which do not interact, shaped to match one another, to allow vertical stacking of two or more steps (10), thus obtaining a modular staircase (1), complete with a landing (20) produced in a similar way to the step (10).

Abstract: The support comprises a horizontal resting deck for a respective step. A first wall including a vertical cylindrical portion is made rigid, on the convex side thereof, with said resting deck and extends above the latter. An additional wall including a vertical cylindrical portion extends fixedly below the resting deck with its concave side facing the convex side of the first wall. Said additional wall has an outer surface matching the outer surface of the first wall.