US2926518A - Reinforcement and form sheets for concrete - Google Patents

Description

March 1950 s. P. FINLEY EIAL REINFORCEMENT AND FORM SHEETS FOR CONCRETE Filed April 28. 1955 IN VEN TORS. 5909054, B FINLEYd? 2.4 YMO/VD .4. JOHNSOM BYZ a hair 6 ,T TORI/5 Y.

United States Patent REENFORCEMENT AND FORM SHEETS FOR CDNCRETE Application April 28, 1955, Serial No. 504,411 1 Claim. (Cl. 72-116) Our invention relates to floor and roof structures of reinforced concrete or other plastic-like material, and more particularly to reinforcement mesh and form sheets therefor.

One object of our invention is to provide a corrugated form sheet and a corrugated reinforcement mesh unitarily arranged in such relation and of such strength as to give adequate support to workmen during the installation thereof, on joists or other structural members, and to support the soft concrete while it is hardenmg. I

Another object of our invention is to provide an improved means for the spacing'or furring of a reinforcement sheet relative to a form sheet.

Some of the forms which our invention may take are shown in the accompanying drawing, wherein Figure l is a fragmentary plan view of the reinforcement mesh and its backing sheet;

Fig; 2 is an end view thereof;

Fig. 3 isa fragmentary longitudinal edge view thereof;

Fig. 4 is a view showing a modification of the structure of Fig. 2, and

Fig. 5 shows still another modification thereof.

Referring first to Figs. 1 to 3, a backing or form sheet 7 preferably of metal that can' suitably be of 28 gauge high tensile steel so as to provide adequate strength for workmen and for the concrete tobe poured thereon. This sheet has corrugations formed therein, to give it greater stiffness, and it can assist in holding concrete against sliding on the form when used on inclined surfaces. 1 v

The reinforcement mesh comprises longitudinally-extending wires or rods 8, and stay wires 9, being suitably of gauge'basic steel. The gauge and spacing of the wires 8 and 9 will, of course, be accordingto the service required. For example, the mesh openings may suitably be 2 /2" 1: 6". The wires 9 are bent to give a corrugated shape to the mesh, so that the wires 8 will stand out from the form sheet 7 for embedment in concrete 10 which is shown in Fig. 2 as a portion of a floor or roof slab.

The corrugations in the mesh are of, greater depth and pitch than those in the form sheet 7, so that the mesh will extend a greater distance into the concrete than if the corrugations of the mesh were shallower. Certain of the mesh corrugations nest within corrugations in the sheet 7 and, at those points, the sheets are connected together by clips or staples 11 or by welding. By connecting the rearwardly-convex sides of the mesh corrugations in the valleys of the corrugations of the sheet 7, there is greater stability and less danger of the mesh 8-9 shifting upon the sheet 7 during shipment and handling.

2,926,518 Patented Mar. 1, 1960.

ICC

When the wire mesh and the metal form sheet are of approximately the gauges above mentioned, and the bends in the mesh sheet are nested in some of the bends of the backing sheet, with the fastenings at various spaced points, the structure will be of suiiicient strength to permit workmen to walk thereon and move wheel barrows thereover, when distributing the concrete, without permanent deformation of the form. The placing of the clips or other fastening devices at some distances apart as shown in Figs. 1 to 3 gives some flexibility to the structure that will yieldably absorb pressures and will spring back into place when deflected slightly.

The form sheet 7 is. extended beyond the mesh, as shown at 12 and 13, at one end and one longitudinal edge of the assembly and the mesh is correspondingly extended beyond the sheet 7 at the other edge and the other end, as shown at 14, to provide for lap joints where two sheets meet, as shown at the left-hand end of Fig. 3.

Another form which our invention may take is shown in Fig. 4 wherein wires 15 correspond to the stay wires 9 and the wires 16 correspond to the longitudinal wires 8, except that the wires 16 are welded to the outer faces of the wires 15. Another distinction over the structure of Figs. 1 and 3 is that certain of the rearwardlyconvex surfaces of the mesh 15-16 are welded at 17 to some outwardly-convex surfaces of the sheet 7. While this structure does not initially have as great strength as the structure of Fig. 2, wherein the corrugations of the two sheets nest somewhat, it enables the mesh to be more deeply embedded in the concrete.

Referring now to Fig. 5, we show an arrangement wherein the corrugations in the mesh that is formed by the stay wires 18 and the longitudinal wires 19 are of approximately the same depth and pitch as the corrugations in the form sheet 7. While this arrangement does not-give so deep embedment of the mesh in the concrete, it will sometimes be adequate for thin slabs. The mesh sheet and the form sheet will suitably be connected at intervals by welding or riveting as indicated at' 20.

We claim as our invention:

A combined form sheet and reinforcement mesh, that comprises a corrugated metallic form sheet, a mesh of resiliently flexible longitudinal wires and stay wires welded crosswise thereof, the mesh being corrugated by bends in the stay wires between the longitudinal wires and nesting in certain of form sheet corrugations, and means firmly connecting certain of the said nested bends to the form sheet, there being a plurality of nested bends between each two adjacent connecting means, whereby the mesh sheet can have some flexibility of movement on the form sheet, at areas between the connecting means, the corrugations in the form sheet being greater in number and shallower than those in the mesh sheet.

References Cited in thefile of this patent UNITED STATES PATENTS 782,810 Murphy et a1. Feb. 14, 1905 1,872,984 Land Aug. 23, 1932 1,943,260 Kahn et al. Jan. 9, 1934 1,967,905 Roos July 24, 1934 2,484,695 Dickey et al. Oct. 11, 1949 FOREIGN PATENTS 850,628 France Sept. 18, 1939 1,045,020 France June 24, 1953

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