FIXED FORMWORK FOR MAKING STAIRS Russian patent published in 2024 - IPC E04G13/06 

FIELD: construction.

SUBSTANCE: invention relates to formworks for making staircases. Fixed formwork for making stairs forms a body, the base of which is shaped support beams, in the lower part of which there is a lower riser, above which intermediate risers are installed. Lower and intermediate risers are made in the form of rectangular plates, the upper face of which has a stiffening rib, the opposite side faces are equipped with mounting ribs, and lower part is made with platform, which is attached to profiled support beams. On two opposite sides mounting ribs of risers are attached to right and left thin-walled strings, which in turn along their lower faces are equipped with platforms and in upper part have mounting rib. In the middle part each of the risers is fixed to at least one profiled support beam by a bunch. From the back side of the body to the shaped support beams, platforms of risers and platforms of the stringers the bottom of the flight of stairs is attached.

EFFECT: increased rigidity of the structure.

1 cl, 6 dwg