Abstract: The collapsible shipping container (10) may comprise a base (12), a roof (14), a pair of side walls (16), a pair of end walls (18), four telescoping corner columns (20), and means such as air jacks (21) and or scissors devices (52) for elevating and lowering the roof, side walls and corner columns. Each of the end walls (18) may be movable between up and down positions, each of the side walls (16) may be formed with a plurality of longitudinally extending, overlapping panels, and the means for elevating and lowering the roof, side walls and corner columns may be operative with the end walls (18) in their down positions.

Abstract: The collapsible shipping container (10) may comprise a base (12), a roof (14), a pair of side walls (16), a pair of end walls (18), four telescoping corner columns (20), and means such as air jacks (21) and or scissors devices (52) for elevating and lowering the roof, side walls and corner columns. Each of the end walls (18) may be movable between up and down positions, each of the side walls (16) may be formed with a plurality of longitudinally extending, overlapping panels, and the means for elevating and lowering the roof, side walls and corner columns may be operative with the end walls (18) in their down positions.

Abstract: A precast concrete bridge system containing one or more sections wherein each section includes a horizontally disposed, load-bearing span that is integrally cast with a pair of vertical side walls. Each wall contains lightweight cores encapsulated in the concrete to create a series of longitudinally extended beams in each wall so that the beams in one wall are coaxially aligned with the beams in an adjacent wall. The cores constitute between 16-35 % of the total section volume.