Battery mold for the production of a ground beam, one-off production of 10 pieces, max. dimension product length 6 m, product height 1 meter, thickness 125 mm and 145 mm. The mold is made of a welded and polished steel structure. Walls made of 6 mm sheet metal, reinforced with a rectangular profile, wall pressure with Betomax 20 screws, bottom guides with holes, possibility of making lower and shorter elements. Additional equipment - form adapted to heating with steam. Form for setting and fixing to the floor.