Abstract: To provide practical corrugated cardboard pallets that cope with rain, humidity or the like and water-resistant corrugated cardboard for use as the material thereof. Water-resistant paper is used for base paper for corrugated paperboard and base paper for flat paperboard, and cornstarch glue containing 7 to 10 percent by weight modified ketone resin is used as an additive for water-resistance, all of which are used to manufacture the corrugated cardboard. Such corrugated cardboard is used at least in the beam portion to produce a pallet.

Abstract: A connectable case and method of forming the connectable case from a synthetic resin plate. The case includes a bottom panel, four side-wall panels each extending from a respective side of the bottom panel and a flap panel extending from the side of at least one side-wall panel, the flap panel extending downwardly adjacent to its respective side-wall panel, such that the space between the downwardly extending flap panel and its respective side-wall panel is approximately equal to the thickness of a side-wall panel. One side-wall panel has at leat one hole formed therein, and one of the flap panel and its associated side-wall panel has at least one protrusion formed therein extend into the space.