FIELD: construction.
SUBSTANCE: frame comprises hingedly connected elements of an arc and frame structure in the form of belts with struts, forming cells of four-link mechanisms, support hinged joints and central hinged joint located above support hinged joints. Cells of four-link mechanisms are formed by elements of belts and ascending struts, besides, adjacent cells are combined into a kinematic chain so that they have common elements in the form of ascending struts, and descending struts are arranged along diagonal lines of four-link cells. The method of frame installation is proposed.
EFFECT: increased reliability.
6 cl, 24 dwg
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