gym dividers acoustical rating automatic walls gym dividers The gym dividers are opened and closed using a spring return, 3 position key switch. Turning the key from the “off” position will cause the wall to move in the designated direction “up” or “down”. When hand pressure is removed, the wall immediately stops. The operable wall stops in a quick and positive fashion without coasting. As a normal part of the operation, it is possible to partially open (or close) the wall, stop it and then reverse the operation. There are 2 key switches per operable wall, on either side of the axis of the wall.