COMPOSITE-MONOLITHIC LADDER AND METHOD OF ITS MANUFACTURING Russian patent published in 2020 - IPC E04F11/22 

FIELD: construction.

SUBSTANCE: invention relates to methods of erection of stair flights. Technical result is achieved by the fact that the prefabric monolithic ladder includes a mold for casting concrete mixture, assembled with the help of a formwork, located and fixed on support surfaces of slabs, comprising reinforcing rods or reinforcing mesh arranged along said mold, wherein formwork for forming ladder march is made of transverse elements having L-shaped section, forming a cavity capacity of the formwork and protruding as elements of fixed formwork, forming the front and rear surfaces of the formed ladder march, note here that lateral ends are closed by end elements performing simultaneously functions of bearing and guiding casing, and technical result is achieved by method of making such stairs.

EFFECT: technical result consists in reduction of cross-section and own weight of ladder flight, exclusion of materials on lining of rear and front surface of stairs, reduction of labor costs due to absence of additional operations on facing and reduction of work time.

12 cl, 3 dwg