Element for use in making a reinforced concrete structure with cavities, filler body for making such an element, and method of making a reinforced concrete structure with cavities

A method of making a reinforced concrete structure comprising the steps of:

• forming a reinforcing element,
• said reinforcing element having (a) a lower reinforcing mesh including mutually crossing reinforcing rods rigidly secure to each other, (b) an upper reinforcing mesh including mutually crossing reinforcing rods rigidly secured to each other, and (c) a plurality of discrete spaced filler bodies of substantially identical shape and size, each said filler body having (i) a major face facing in a same direction as a lower side of the concrete structure, (ii) edges around said major face, and (iii) a flange extending outwardly from each said edge,
• said forming step including the steps of (a) cooperating said filler bodies with said upper and lower meshes so as to locate said filler bodies in a regular pattern corresponding to a pattern of said upper and lower meshes and so as to cooperate each flange with an adjacent said flange of an adjacent said filler body such that a lower shuttering is formed by adjacent said flanges, and (b) interengaging said filler bodies with said upper and lower meshes so as to form a rigid body;
• placing at least one reinforcing element in a casting space;
• casting a fluid concrete in said space and allowing said fluid concrete to set.