Structural elements and assemblies for construction material packaging

A plasterboard stack support assembly comprising at least one elongated and partially hollow support leg composed of a shaped polymer, wherein said support leg includes:

• external walls comprising two opposing side walls extending vertically from a base surface, and two edge walls having a sloped part extending from the base surface to a vertical part extending to a top surface of the support, the support being opened at the top;
• said two side walls having a vertical height defined by a distance between the base surface and the top surface along a vertical direction perpendicular to the base surface and top surface;
• said base surface and said top surface having a horizontal width defined by a distance between outer sides of the side walls along a horizontal direction perpendicular to the side walls;
• wherein said two side walls are connected to one another with intersecting interior walls defining a plurality of intersecting x-shaped vertical structures arranged along a longitudinal direction extending between the end walls;
• wherein said vertical height is greater than said horizontal width;
• and
• wherein surfaces of the intersecting interior walls are oriented along the vertical direction and also oriented diagonally relative to the side walls to form hollowed channels extending along the vertical direction and within said support leg, and the intersecting interior walls are sized, positioned and oriented so that the external walls and the intersecting interior walls of the x-shaped vertical structures both perform compressive load bearing when supporting a plasterboard stack.