Abstract: An arbor trap apparatus for use with a counterweight rigging system having at least one counterweight arbor. The apparatus may include a trap housing for attachment to a support structure, and at least one catch blade for attachment to the counterweight arbor. The catch blade may enter the trap housing as the counterweight arbor moves generally towards the trap housing, and the trap housing may engage the catch blade to prevent the counterweight arbor from moving generally away from the trap housing. The trap housing may transfer load from the counterweight arbor to the support structure and prevent a runaway.

Abstract: An arbor apparatus for use in a counterweight rigging system includes a support structure for supporting counterweight bricks in stacked arrangement. The arbor apparatus can be front-loading with left side, back and right side supports. The arbor apparatus can include a plurality of shelf members spaced apart in a longitudinal direction between the top and bottom ends. The arbor apparatus can also include a gate mechanism. The arbor apparatus can be implemented as a retrofit to existing manual counterweight rigging systems.