UNIVERSAL SUPPORT MODULE FOR STAIR STEPS AND FRAME Russian patent published in 2016 - IPC E04F11/35 

FIELD: construction.

SUBSTANCE: invention relates to structures of quick-mount prefabricated stairs. Universal support module for stair steps and frame comprises parallel vertical walls, changing on one side into a cylindrical surface with a horizontal slot in lower part, and limited on other side by a fastening element with a vertical slot. Parallel vertical walls, changing into cylindrical surface and restricted by fastening element, are made in form of a solid bent sheet of rolled stock. Top edges of parallel walls, having holes for attachment of stairs are bent outward at an angle of 90°. Fastening element is formed by, bent inside module, vertical extreme sections of parallel walls at an angle of 30° to 60° and bent outward rigidly connected edges of said sections, making up a flat platform.

EFFECT: reduced labour intensiveness of manufacturing and assembly, higher rigidity of connecting bearing modules and manufacturability.

1 cl, 1 dwg