Abstract: A beam trolley has a system that provides for adjustment of the width without removing the side plates. A load bar with right hand threads on one side and left hand threads on the other side is installed in threaded openings in side plates. A load plate with an anti-rotation profile in a midportion supports an underhung hoist. The load plate engages with the load bar such that in a first configuration the load bar is prevented from rotating relative to the load plate and in a second configuration the load bar may rotate freely with respect to the load plate. In another embodiment, a pair of load bars are used in connection with an elongate rod for adjusting the side plates. The pair of load bars provides for increased headroom for the hoist.

Abstract: A vehicle barrier system. The vehicle barrier system includes a base, an arm hingably mechanically coupled to the base, a raising/lowering mechanism in mechanical communication with the arm, and a cable supported by the arm, the cable mechanically coupled to first and second anchors placed on opposite sides of an area through which a vehicle may pass, and the raising/lowering mechanism moves the arm and the cable between a first position and a second position.

Abstract: An enhanced vehicle barrier system. The enhanced vehicle barrier system including bases located on opposite sides of an area through which a vehicle may pass, first and second arms hingably mechanically coupled to a base, first, second and third members, a raising/lowering mechanism, and a cable in mechanical communication with at least one of the first, second, and third members, the cable having connecting points located on opposite sides of the area through which a vehicle may pass, and wherein, in one position, at least portions of the first, second, and third members and the cable may be high enough to encounter a front of a vehicle.

Abstract: An enhanced vehicle barrier system. The enhanced vehicle barrier system including bases located on opposite sides of an area through which a vehicle may pass, first and second arms hingably mechanically coupled to a base, first, second and third members, a raising/lowering mechanism, and a cable in mechanical communication with at least one of the first, second, and third members, the cable having connecting points located on opposite sides of the area through which a vehicle may pass, and wherein, in one position, at least portions of the first, second, and third members and the cable may be high enough to encounter a front of a vehicle.

Abstract: A vehicle barrier system. The vehicle barrier system includes a base, an arm hingably mechanically coupled to the base, a raising/lowering mechanism in mechanical communication with the arm, and a cable supported by the arm, the cable mechanically coupled to first and second anchors placed on opposite sides of an area through which a vehicle may pass, and the raising/lowering mechanism moves the arm and the cable between a first position and a second position.