FIELD: construction.
SUBSTANCE: invention is related to the field of construction, in particular to floor boards of plank materials with mechanical connecting systems. Floor boards are described, which are equipped with mechanical connecting system comprising flexible rabbet in slot providing for displacement, which is displaced in process of motion in case of vertical folding. Besides rabbet making is described, as well as manufacturing and installation methods.
EFFECT: improved accuracy of floor boards installation and operational reliability of floor.
38 cl, 24 dwg
