A multilayer steel-reinforced concrete panel assembly comprises a steel-reinforced concrete outer plate, a steel-reinforced concrete inner plate and a layer of insulation sandwiched between these plates. The outer plate and the inner plate are interconnected by flat anchors traversing the intermediate insulation layer and the anchors are distributed along an imaginary circle whose diameter is greater than the length of the small side of the rectangular panels. At least three such flat anchors are provided, two of which are capable of absorbing all of the stresses while all of the flat anchors are disposed symmetrically with respect to the longitudinal plan axis of the panel. The flat anchors take up all of the stresses to which the panel may be subject and thus eliminate the need for an additional anchor at the centroid of the panel, i.e. the center of stress forces and the like.
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