ADJUSTABLE FLOOR, SET OF MEMBERS AND SUPPORT RACK FOR ADJUSTABLE FLOOR Russian patent published in 2009 - IPC E04F15/24 

FIELD: construction industry.

SUBSTANCE: invention refers to construction industry and namely to adjustable floors. Adjustable floor includes boarding joists with through threaded holes in which hollow support racks with external thread are screwed. Each rack consists of a vertical part and a bottom part with central hole for passing the fastening element and having flat external surface and internal cone-shaped surface converging in direction of the central hole. Joists are made in the form of bars from whole timber with pre-drilled threaded holes after timber has been dried up to humidity of not more than 12%. The rack is made from thermoplastic material of the group containing polystyrene, and ratio of minimum thickness of the wall of vertical rack part not considering the height of turns of thread in the area of its being attached to internal surface of the bottom part to minimum distance from internal surface of the bottom part to its flat external surface is 1:(2-6).

EFFECT: improving the floor operating reliability.

6 cl, 4 dwg