FIELD: construction.
SUBSTANCE: invention relates to modular staircases and can be used for interfloor connection inside premises. Technical result is achieved by the fact that the ladder module includes front and rear vertical plates, each of which is equipped with lugs for movable connection with another module in vertical plane, and connected to each other by means of permanent connection by means of structure from rolled metal sheets.
EFFECT: increased rigidity of the structure.
3 cl, 10 dwg
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