Abstract: Variable floor height tiered stands installed in a gymnasium, auditorium, indoor or outdoor athletic field or the like, including tiered floor members of which displacement in the fore-and-after direction and variation in depth are minimized when their inclination is changed, thereby to maintain constant the planar projected space of the stands in the architectural plan and to eliminate the risk of interference between the stands and any stationary structure in changing the inclination.

Abstract: A chair-raising and folding construction is simple in construction and reduced in weight, and is also capable of, when using a moving stand with lower stages of decks protracted, effectively preventing spectators, etc. from entering into non-used decks protracted. The moving stand telescopically accommodates and protracts a plurality stages of decks (1,2). Each of the decks (1,2) has a plurality of raisable and foldable chairs (3). A leg portion (5) of the chair (3) is hinge-connected to a base frame (4) disposed on the deck (1). A crank member (10), comprising a swing arm (12) protruding upward from the base frame (4), and a hook (13) protruding forward from a lower end portion of the swing arm (12), is rotatably supported at a corner portion thereof. The swing arm 12 has such a protruding length such that a distal end portion thereof abuts against a front end surface (2a) of the upper stage-side deck (2).