US2215975A - Slab and floor - Google Patents

Description

Sept. 24, 1940. Q RACKLE l 2,215,975

SLAB AND FLOOR Filed June 13, 1959 2 Sheets-Sheet 2.

INVENTOR George L. Raak'le 4 v ATTORNEYS Patented Sept. 24, 1940 SLAB AND FLOOR George L. Rackle, Cleveland, Ohio,v assigner to The Geo. Rackle & Sons Go., Cleveland', Ohio,

a corporation of Ohio Application June 13, 1939, Serial No. 278,877

3 Claims.

This invention relates to an improved building slab and floor structure, an object of the invention being to provide an improved structure which will present a strong formation when built into a oor.

Another object of the invention is to provide a iloor slab which is of a size to be lreadi-ly handled and which is so formed that when placed in the licor it is readily interlocked with adjacent slabs to form a complete oor.

A further object of the invention is to provide an improved slab and floor structure wherein the slabs are reinforced individually and grouting as l well as reinforcing materials are arranged between the respective slabs to provide a proper connection between the slabs.

In the accompanying drawings- Fig. 1 is a sectional view through part of a floor disclosing certain features of the invention;

Fig. 2 is a perspective view of part of one of the slabs shown in Fig. 1, certain parts being broken away for illustrating the reinforcement;

Fig. 3 is a top plan view of part of the structure shown in Fig. 1, certain parts being broken away for illustrating certain vbonding and anchoring members; and

Fig. 4 is a sectional view through Fig. 3 approximately on the line 4 4.

Referring to the accompanying drawings by numerals, I indicates the flooring as a whole and 2 a slab. The slab- 2 may be of any desired length and also of any desired width. However, it has been found that a desired width for the slab is twenty-four inches while the depth is approximately six inches at the sides and approximately two inches at the center. A desired length for most uses is sixteen f eet. A slab of this size presents a unit designed to carry light house loads. While the dimensions given have proved satisfactory for many uses, it will be understood that the slab may be larger or smallerv without departing from the spirit of the invention.

As illustrated particularly in Figs. 1 and 2, the slab 2 is provided with a center 3 which is flat and straight when properly cured and set. The upper surface is hard trowelled to provide a desired appearance and surface. The center part 3 is preferably of the same thickness throughout and merges into depending edge members 4 and 5 which are identical in construction. kA metalreinforcement 6 is provided for the slab,

said reinforcement including a loose Woven metal framework 'I and a pair of comparatively large strong bars 8 and 9 extending through the re` spective edge members 4 and 5. It will be understood,v of course, that the reinforcement 6 is placed in a suitable mold and concrete is cast around the same.k l 5 In forming the slab 2 `each longitudinal edge is provided with an voffset IO whereby laterally contacting longitudinal beads or extensions Il will. be presented. Also there is 'provided a groove I 2' in each of the offsets-I0. By this construction lfd when two or more of the slabs are in use, as shown in. Fig. 1, the beads or extensions II come together but preferably 'a small layer of 4cement is arranged therebetween. ,v

When the: parts are arranged as shown in Fig.

1, grooves are presented in which suitable grouting material is placed that acts to provide 'a suitable joint between the side edges of the respective slabs. If desired, a pipe I5 may be embedded in the grouting I4 for the reception of telephone 2O Wires or other articles as desired.r Where the ends of two slabs 2 are supported by abeam I6, as shown in Fig. 4, a continuity rod or bar I1 ris positioned preferably centrally of the grouting I 4, though if desired it could be arranged in one of the semi-circulargrooves I2. Byreason of the semi-circular grooves I2, the grouting presents a strong key for locking the parts together. Also, if desired, end anchoring membersy I8 could be provided. After the grouting I4 has been placed in position it is trowelled down smoothly and evenly with the adjacent slabs so that arcontnuous even flat floor will be provided.

As the slabs 2 are preferably comparatively narrow and comparatively short they may be readily handled by workmen and as they are preformed a few workmen may quickly lay or build a floor that will be strong and will present a neat appearance. Inview of these facts it will readily be seen that the ease of handling and the simplicity of the structure results in a low cost of production and at the same time presents a floor structure in which continuity bars may be placed as desired. Also by reason of the fact that the slabs may be grouted together along longitudinal lines, strains will `be readily conveyed to vadjoining units which result in presenting a strong oor with a minimum amount of material.r The respective slabs 2 are perfectly'straight and l true and the upper surface of each slab is hard trowelled and the joining is rst grouted and then pointed with any colored mortar and struck smooth as in case of Spanish floor tile. The re- 4 spective slabs will be slightly cambered or crowned when cast from one end to the center to compensate for the shrinking of the grouting when it is thoroughly cured. When the respective units or slabs are cured they Will be straight and the oor will be straight and fiat.

By reason of the construction presented if light-weight aggregate in the grouting is used, the Weight is maintained at a minimum for a given strength of floor. Also by reason of the provision of the grouting not only may the separate units be almost integrally connected but means are provided for running wires through the center of the ceiling or across the oor Without injuring the slabs.

I claim:

1. A concrete iioor slab, including a metallic reinforcement having a. foraminous at metal body and depending foraminous side Walls for the full length of the body and a stiffening bar independent of and spaced from said foraminous body arranged adjacent the lower edge of each of said side walls for the full length of the side Walls and a body of concrete embedding said reinforcement, said concrete body having a substantially straight iiat central portion and a pair of depending side members, the bars of the reinforcement being arranged in the lower part of s'aid depending side members, each of said depending side members being formed with a rectangular longitudinally extending projection at Vits lower edge and a longitudinally extending groove between the projection and the surface of the slab in each depending side member.

2. A floor of the character described, including a plurality of slabs arranged side by side, each of said slabs being formed with notches which form grout-receiving grooves when the slabs are arranged side by side, a supply of grouting material arranged in each of said grooves and continuity bars arranged in said grooves and embedded in said grouting material, said continuity bars functioning to lock slabs together end to end While said grouting material functions to lock the respective slabs together edge to edge.

3. A reinforced concrete floor slab including a concrete body and a metal reinforcement extending throughout said concrete body, said having one of said bars embedded therein nearA its lower edge, each of said depending portions having a longitudinally extending offset, a longitudinally extending groove intermediate the height of the offset, and a rectangular bead extending laterally from the longitudinal edge whereby when two slabs are placed in contact side by side said beads will engage and the offsets of the respective slabs will form a groutreceiving recess.

GEORGE L. RACKLE.

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