Abstract: A fumigation tent includes a frame suspended from a structure by support cables, the frame having an underside; a tarp adapted to be mounted to the top side of the frame, the tarp hanging from the frame defining a tent having a top and side curtains having a lower periphery that defines a bottom perimeter; a sealing arrangement for connecting and sealing the top of the tarp to the frame; a first plurality of cables for raising and lowering the side curtains and being connected to the side curtains and to means for raising and lowering the first plurality of cables; a second plurality of cables for raising and lowering the frame and being connected to the frame and to means for raising and lowering the second plurality of cables.

Abstract: The present invention provides a fumigation tent which includes a frame suspended from a structure by support cables, the frame having an underside; a tarp adapted to be mounted to the top side of the frame, the tarp hanging from the frame defining a tent having a top and side curtains having a lower periphery that defines a bottom perimeter; a sealing arrangement for connecting and sealing the top of the tarp to the frame; a first plurality of cables for raising and lowering the side curtains and being connected to the side curtains and to means for raising and lowering the first plurality of cables; a second plurality of cables for raising and lowering the frame and being connected to the frame and to means for raising and lowering the second plurality of cables.

Abstract: A fumigation tent comprises a frame that can be suspended from the roof of a dock building by support cables. The frame has an underside to which a tarp is mounted. The tarp hangs from the frame defining a tent having a top and side curtains having a lower periphery that defines a bottom perimeter. Horizontal pipes are attached to, and arranged along, the side curtains of the tent at spaced intervals between the bottom perimeter of the tent and the top of the tent. Winch cables attached at one end to clew plates draw up the horizontal pipes. The clew plates can accommodate several winch cables and are connected by winch chains to motorized winches which operate together so that the tent remains substantially level when it is raised and lowered. Rings, disposed around the winch cables and attached to the horizontal pipes, gather up and support the tarp as the tent is being raised. The rings cooperate with the horizontal pipes to collect the tarp into a plurality of small bagouts or overhanging portions.

Abstract: A roof assembly exemplarily for use in outdoor theatrical and musical productions comprises a roof trusswork elevated by means of a plurality of telescoping legs. The legs are raised in unison so that the roof trusswork maintains the same orientation throughout a raising or lowering operation. A clamping or locking mechanism is provided for rigidifying the entire structure upon the raising thereof.