Importance

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Abstract

To improve sound damping in prefabricated building elements having two parallel welded wire mesh mats 1, 2, interconnected by web wires 7, 7' enclose, therebetween, an insulating body (8) for example of foam plastic. Concrete is then sprayed on both sides over the mesh wires to form inner and outer shells. These concrete shells are interconnected by forming the insulating body with through-holes, which, upon concrete spraying, will form concrete webs or plugs (14, 14') interconnecting the two shells, thus preventing resonant sound vibrations of the concrete shells. The through-holes (10, 11, 11') can be molded during manufacture of the insulating body (8) or drilled or stamped therethrough, and may extend at right angles through the major extent of the foam body or obliquely, preferably downwardly and distributed randomly.

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First Claim