Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Fabric or lattice; e.g. – indeterminate grating
Patent
1983-08-08
1985-12-24
Lusignan, Michael R.
Static structures (e.g., buildings)
Openwork; e.g., truss, trellis, grille, screen, frame, or...
Fabric or lattice; e.g., indeterminate grating
523097, 52612, E04C 242, E04C 504, E04C 100, E04B 504
Patent
active
045597529
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a panel, and more specifically to the internal metallic reinforcement which it comprises, intended for building construction. These panels form the framework and the facing of the structure and can then be used to produce the internal and external walls, floors, ceilings and roofs.
The metallic reinforcement of the known panels generally consists of two mutually parallel metallic lattices maintained at constant interval by distinct metallic elements serving for spacing and for attachment by welding, clamping, hooking, trying et cetera; the lattices in question consist of sufficiently large metallic wires welded together in the form of meshes, or else by wire-based metallic netting.
A cheap and relatively light filler material can be enclosed between the two lattices, leaving the lattices superficially free so that covering material can be attached to said lattices by engagement and penetration between the meshes, these materials possibly consisting of mortar, concrete, plaster . . . and being introduced. by pouring, foaming, et cetera. The metallic spacing elements are also welded to the lattices.
The disadvantage of the reinforcement of these known panels lies in the fact that it is practically impossible to produce an automatic machine which can perform the attachment, preferably by welding, of the metallic lattices to the spacing elements. This practical impossibility results from the fact that it is necessary to operate on round metallic wires and to make a very large number of welds in all directions of a three-dimensional space.
The invention seeks to obviate this major disadvantage, which prevents any economical application of said panels.
In order to achieve this aim, and according to the invention, the reinforcement of the panel is exclusively a framework of "expanded metal" in a three-dimensional structure exhibiting mutually parallel ribs at the surface and inclined cross-struts, joining these ribs, inside. Thus the production of the reinforcement involves only the cutting and expansion of a metallic sheet; it is therefore free from the operations of positioning and welding of the components which hitherto made the application of such panels insufficiently profitable to occupy the desired position in economic construction.
More specifically, and by way of illustration without implying a limitation, the invention consists:
in that the ribs of the framework before "expansion" are mutually parallel and mutually spaced, these ribs being intended to form the surface bars of the reinforcement located on one side when they are of even rank and on the other side when they are of odd rank,
in that the cross-struts joining the ribs extend between them and are separated from the latter by interrupted cutting lines defining the edges of said ribs, whereas the two ends of each cross-strut remain fixed, the one to a rib of even rank and the other to a rib of odd rank, forming joint nodes,
and in that the distribution of the joint nodes when the metal is plane and unexpanded is different from the distribution of these nodes in projection onto this plane when the metal is expanded into a three-dimensional structure, inasmuch as during the expansion, the ribs of even rank must be moved parallel to themselves in an oblique direction so as not only to move the ribs of odd rank away from the plane defined by the ribs of even rank, but likewise to incline the cross-struts concomitantly.
According to a particularly advantageous embodiment, each node of a rib of even rank connects the adjacent ends of two cross-struts, respectively extending on the two sides of the relevant rib and in the same direction, the direction being reversed for the cross-struts of the two consecutive ribs of even rank; each node of a rib of odd rank connects the adjacent ends of two cross-struts and extending respectively on the two sides of the relevant rib and in opposite directions, the directions being reversed for the homologous cross-struts of two consecutive ribs of odd rank.
According to a preferred em
REFERENCES:
patent: 3111204 (1963-11-01), Phere
patent: 3825465 (1974-07-01), Stock
patent: 4125981 (1978-11-01), MacLead et al.
patent: 4283896 (1981-08-01), Fricter et al.
patent: 4336676 (1982-06-01), Artzer
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