Abstract: An unsupported span device for portable structures and portable signage is provided comprising a plurality of vertical members that provide vertical load-bearing capability to the unsupported span; a plurality of horizontal members for providing a bearing surface for a load applied to the unsupported span; means for fixing the location of the plurality of horizontal members with respect to the plurality of vertical members; a tensioning member for inducing tension between the plurality of vertical members; means for fixing the location of the tensioning member with respect to plurality of vertical members; a plurality of tethers for laterally stabilizing the unsupported span; and a plurality of anchors for providing fixed points of attachment for the plurality of tethers. A method of forming an unsupported span is also provided.

Abstract: A tension strap device for holding a load in place on a vehicle using nylon straps and winches with chain-based hold-down structures, as found, for example, inside semi-trailers such as flatbed trailers with sides. The device includes a tension winch, a tension strap, an end hook attachment, and a strap-to-chain adapter. A load is held in place on a hauling vehicle using the tension strap device. Existing load chains mounted on the bed of a vehicle for tying down loads, are connectable to the strap-to-chain adapter, which is connectable to the end hook attachment.