A casted corner and bottom for a multi-purpose carrier having top, bottom, and vertical rails includes (a) a casted corner with a top face and at least three hollow faces with openings for mounting with the top and vertical rails from three directions; (b) a padeye arranged diagonally on the top face, the padeye provided with an aperture allowing the multi-purpose carrier to be craned or lifted; and (c) a casted bottom with at least three openings for mounting with the bottom and vertical rails or a transport case. The bottom face of the casted bottom is hollow with a diagonally arranged slot. The casted corner and casted bottom are mounted respectively onto the top and bottom corners of the multi-purpose carrier and/or transport case, which are securely liftable and stackable with the padeye of the casted corner inserted into the slot of the casted bottom.