Floatable concrete pallet for lifting and bearing heavy loads

The method of making a floatable pallet for lifting heavy loads, which comprises

• precasting a first plurality of substantially identical elongated grillage prestressed concrete elements, each of said elements having anchors projecting from the ends of one elongate edge thereof, said anchors being bent sideways for attachment to an adjacent surface, and interfacing seats spaced along the other elongate edge thereof,
• aligning said first plurality of said elements so as to be parallel and spaced apart from each other, each of said elements being upright and supported from the elongate edge from which said anchors project,
• pouring a concrete bottom deck slab so as to secure said slab to the anchors of said first plurality of elements, two edges of said slab havng anchors projecting therefrom, said anchors being bent sideways for attachment to an adjacent surface, vertically projecting anchors upwardly extending from near the other opposite ends,
• precasting a second plurality of substantially identical elongated grillage prestressed concrete elements, each of said elements having anchors projecting from the ends thereof, said anchors being bent sideways for attachment to an adjacent surface, and interfacing seats spaced along the elongate edges thereof,
• stacking said second plurality of elements upright on edge at a transverse angle to said first plurality of elements so as to be parallel, said interfacing seats of said first plurality of elements mating with the contiguous interfacing seats of said second plurality of elements,
• precasting a third plurality of substantially identical elongated grillage prestressed concrete elements each of said elements having anchors projecting from the ends and one elongate edge thereof, said anchors being bent sideways for attachment to an adjacent surface, and interfacing seats spaced along the other elongate edge thereof,
• stacking said third plurality of elements upright on edge at a transverse angle to said second plurality of elements so as to be parallel, the contiguous interfacing seats of said second plurality of elements mating with the interfacing seats of said third plurality of elements,
• pouring concrete side bulkheads so as to secure said side bulkheads to the contiguous adjacent anchors projecting from the ends of said first, second and third grillage elements and of said bottom slab, two of said side bulkheads resting on said bottom slab at its vertically projecting anchors, said side bulkheads including anchors projecting from the top edge thereof, said anchors being bent sideways for attachment to an adjacent surface, and
• pouring concrete top deck slab to as to secure said slab to the contiguous anchors of said third plurality of elements and of said side bulkheads.

A floatable concrete pallet for lifting heavy loads, comprising

• a top deck,
• a bottom deck,
• side and end bulkheads of substantially uniform vertical dimensions water-tightly attached to said top and bottom decks so as to evenly space said top deck from said bottom deck, and
• a grillage system between said top deck and said bottom deck including
• a first plurality of elongated parallel and upright elements spaced apart from each other, each of said elements a precast, prestressed concrete element the elongated dimensions thereof being adjacent and secured to said bottom deck, and
• a second plurality of elongated parallel and upright elements spaced apart from each other, each of said second plurality of elements a precast, prestressed concrete element being stacked on and at a transverse angle to said first plurality of elements.