| 摘要 |
A portable bleacher construction includes a wheeled framework for supporting a plurality of bleacher seats thereon in a mobile travel condition and a stationary seating condition. At least one pair of leveling jacks is located on opposite sides of the framework for stabilizing and leveling the framework upon a ground surface when the portable bleacher construction is in the stationary seating condition. The jacks are arranged to provide a four-point stance for the framework, and have a high sway load capacity to provide lateral stability. A control arrangement is associated with one of the jacks in each pair for separately controlling the leveling of both of the jacks. The control arrangement is located on one side of the bleacher construction, and enables operation of leveling jacks on both sides. The control arrangement includes a pair of transfer rods and a separate operating handle interconnected with each transfer rod. One of the transfer rods provides an input to the jack with which the control arrangement is associated, and the other transfer rod extends across the bleacher construction and provides an input to the opposite jack.
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