FIELD: construction.
SUBSTANCE: device to form a staircase comprises multiple extended tread rise formwork holders arranged one above another, besides, the holders are made as capable of longitudinal displacement relative to each other, a fixing unit for fixation of at least the lowest holder of tread rise formwork in the position, relative to the base, and a positioning aggregate, attached to at least one of the tread rise formwork holders and interacting with other tread rise formwork holders for simultaneous displacement of holders relative to each other, to produce a stepped working configuration that approximates the angle of the produced staircase. Also the method of staircase formation is described.
EFFECT: reduced cost and simplified assembly of the device.
18 cl, 5 dwg
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