Prefabrication system for building walls

DETAILED DESCRIPTION In the prefabrication system for building walls, according to the invention, provision is made for pairs of shell-shaped or panel-shaped symmetrical elements, having stiffening ribs and lightening depressions or recesses on one face.
The pairs of panel elements are made of cement or equivalent material and are preferably of the same shape.
In a prefabrication, these elements are arranged facing each other with the ribbed surfaces facing one another.
The space between the panel elements is filled with locally expanded synthetic material which steadily connects the two shell-shaped elements to form a wall element, and within which passages, such as conduits, are defined, for various services and uses.
The ribbed surfaces or rib portions of a pair of opposed panels may contact each other or can be spaced from each other with a corresponding thickness of locally expanded synthetic material therebetween.
Spacing members may be provided between the two panel elements.
A plurality of pairs of opposed panels can be assembled with mechanical connections therebetween and by a continuous mass of locally expanded synthetic material.
Each panel can be subdivided, in particular, by being sawed, to obtain wall structures of modular sizes.
The shell-shaped or panel elements are each provided with recessed flat steps on their outside surfaces.
The recessed steps extend along at least one of two edges which, in a building installation, are horizontal, and, in particular, along both edges.
The recessed steps are designed to receive conduits and the like, such as lines, and electrical conductors.
Provisions are made for transverse covering elements, such as skirting-boards, and frame-like elements to be placed on the panel elements at the building site to cover these lines and electrical conductors, as well as to cover connection means between the walls thus formed and horizontal floor structures or the like.
The reinforcement ribs extend in two orthogonal positions and include recesses to receive conduits or lines and the like formed within the mass of expanded resin