Patent ID: 8590230

Claim:
A concrete slab element, comprising: at least one hollow element region comprising hollow elements disposed therein; at least two lattice systems retaining the hollow elements in the at least one hollow element region, wherein the at least two lattice systems comprise at least a first size lattice system configured to retain a first size of the hollow elements and a second size lattice system configured to retain a second size of the hollow elements, wherein the first size lattice system is higher than the second size lattice system, and wherein the first size hollow elements are higher than the second size hollow elements; and first stressing elements installed through the concrete slab element, supported across the lattice systems and hollow elements, wherein the respective varying heights of the first size lattice system with first size hollow elements and the second size lattice system with second size hollow elements are configured to support the first stressing elements in a wave-like shape in a lateral view of the concrete slab element.