PREFABRICATED REINFORCED CONCRETE STAIRCASE (VERSIONS) Russian patent published in 2017 - IPC E04F11/00 E06C1/00 

FIELD: construction.

SUBSTANCE: reinforced concrete staircase contains L-shaped steps successively installed with the support of the riser of the upper step to the tread of the lower step and connected to each other by means of welding embedded parts. The solution substance lies in the fact that the embedded parts of the steps include plates placed at the butts, each of which is made with the possibility of connecting by its upper face to the lower face of the plate of the upper step and the by its lower face - to the upper face of the plate of the lower step. According to the first versiont, the embedded plates are arranged at both butts of the staircase steps. According to the second version, the embedded plates are arranged at one butt of the steps, while projecting anchor rods designed to be connected to the wall are arranged at their second butt.

EFFECT: after joining the embedded plates of the steps along the side of thestaircase, an all-welded metal skirt rigidly fixed in the concrete bodies of the steps is formed, which provides the required stiffness and reliability of the staircase structure and at the same time allows to make the staircase construction significantly more lightweight, to simplify the installation work, and to exclude the need for lifting equipment.

4 cl, 12 dwg