The invention relates to the construction, in particular, to strengthen the structures of reinforced concrete hollow-core slabs, to which access from above is impossible, for example, floor slabs, used mainly in buildings with a combined roof.;The purpose of the utility model is to provide a hollow-core design of the gain, which allows you to boost the plate with low concrete strength class.;Summary of the utility model is that the design is enhancing core slab, comprising an additional valve that is disposed in grooves formed in the extended area of the plate below voids plate, the grooves are connected with said cavities, additional reinforcement being provided with at least two anchors which are located at end portions of the additional valve and installed in the holes formed in placements of said anchor, at the end and central portions of the additional reinforcement in the holes, the recess and a vacuum plate formed tabs, the end and central portions of the additional reinforcement and anchor hardwired data dowels, while between groove and a hole is made trapezoidal slot, which is hardwired additional reinforcement. The side faces trapezoidal slot made at an angle of 15 °≤ φ 75 °to the axis of the groove. The tapered slot and hollow boards are key.
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