US1088956A - Reinforced-concrete floor construction. - Google Patents

Description

R. ANDERSON, DECD. G. M. ANDERSON, ADMINISTRATOR.

REINPORGED CONCRETE FLOOR CONSTRUCTION.

APPLICATION IILDD JAN. 1a, 1911.

1,088,956. Patented Mar. 3 1914.

2 SHEETS-SHEET 1.

COLUMBIA PLANOGRAPH co..w\sHlNa1nN. D. c.

R. NDFRSON,` DEOD.

G. M. ANDERSON, ADMINISTRATOR.

REINFORCED CONCRETE FLOOR CONSTRUCTION.

APPLICATION FILED JAN.18, 1911.

1,088,956, Patented Mar. 3, 1914.

2 SHEETS-SHEET 2.

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CoLUMBxA PLANOQRAPH Co.. WASHINGTON. n. c.

UNITED STATES PATENT OFFICE.

ROBERT ANDERSON, OF CINCINNATI, OHIO; GEORGE. M. ANDERSON, ADMINISTRATOR OF SAID ROBERT ANDERSON, DECEASED.

REINFORCED-CON CRETE FLOOR CONSTRUCTION.

To all whom 'it may concern:

Be it known that I, ROBERT ANDERSON, a citizen of the United States of America, and resident of Cincinnati, county of Hamilton, and State of Ohio, have invented certain new and useful Improvements in Reinforced- Concrete Floor Constructions, of which the following is a specification.

This invention relates to concrete structures and has for an object to produce a new and improved support bracket for columns, which may be employed in supporting the floor panels of concrete structures.

A further object is to produce a shelf or support bracket for concrete floor panels, which may be employed in connection with concrete columns, steel columns, or in connection with built-up steel columns.

A further object is to produce a relativelyg shallow support bracket for floor panels,

which will eliminate the necessity of em-` ploying 'column caps below the floor panels j of the concrete structure, and to which the reinforcing members of the floor panels may be secured.

These and other objects I attain by means of a bracket embodying the features herein described, `and illustrated in the drawings` accompanying this application and forming a part thereof.

In the drawings, Figure l is a sectional view along the line lhl of Fig. 2, and illustrates a bracket embodying my invention, together with reinforcing members of the floor `system and the means employed for securing the reinforcing members to the brackets. Fig. 2 is a fragmental sectional view along the line 2 2 of Fig. 1 and illustrates the construction of the brackets shown in Fig. l, together with a fragmental section of a column and a Hoor panel. Fig. 3 is a view of the column reinforcing members or bands and the V-shaped tension members, with the panel rods removed.

The concrete column illust-rated, is provided with four vertically extending reinforcing members 3, each of which consists "of a pair of angle irons located back to back and secured together in the usual manner. Any suitable steel section may be employed in forming the members 8, that will provide a rigid column frame, and means for supporting brackets 4, for supporting the floor system. Each bracket l is adapted to transmit the support-ing or tensile force, en-

Specication of Letters Patent.

Application filed January 18, 1911.

Patented Mar. 3, 1914. Serial N o. 603,204.

countered by the reinforcing rods or members of the floor panels, to the reinforcing members 3 of the column, and is so arranged that it will engage or support the reinforcing members of the floor system.

The bracket illustrated, consists of tension members 5, which are bent substantially V- shaped and extend around the column reinforcing members 3, and which support rigid plates or strips adapted to be employed in suspending the reinforcing members of the floor system. The bracket 4 is octagonal in shape.

The outer ends of the channels are secured together by means of plates, which are arranged to form a` hollow octagonal polygon and are secured in place by any suitable i means, such, for example, as rivets. In bend mg the channels into the V-shaped members 5, it is first necessary to turn down the flanges of each channel at the point of bending, so that they are in the same plane with the web or back of the channel; the channels can then be bent as illustrated. The flattening out of the flanges of the channels, increasing the bearing, is between the channels and the members 3 and does not reduce the tensile strength of the channels.

In the drawings, I have shown adjacent ends of adjacent channels secured together, by means of narrow plates or strips 6, which are secured near their ends to the upper flanges of the channels by means of rivets or bolts, and which are adapted to engage and ,support the turned-down or hooked ends of the reinforcing members of the floor panels. The ends of the plates 6 project beyond the channels to which the plates are secured, and ran intermediate pla-te 7 is secured to them by means of bolts or rivets. The plates 7, like the plates 6, are adapted to engage the hooked ends of the panel reinforcing members and to support the members. They also form with the plates a hollow octagonal polygon, which connects the ends of the bent channels together.

Under ordinary conditions, the concrete of the column and of the fioor panels located between the adjacent legs of the V-shaped tension members 5, will take up the compression occasioned by the pull of the panel reinforcing members and the resultant deflection of the supporting plates. Under some conditions, however, it is necessary to provide auxiliary means for taking up the compression strains and for in effect reinforcing the plates 6 and 7. I have, therefore, provided a series of compression members or plates 8, which are located between adjacent legs of the V-shaped tension members, and are secured in place at the ends and near the bottoms of the channels comprising the members 5. Alternate plates of the series are turned up at their ends, and are secured to the backs or webs of the channels by means of bolts or rivets, while the intermediate plates are secured to the flanges of the channels in the same manner. These plates S form an octagonal hollow polygon, are located near the bottoms of the finished floor panels, and are not employed in supporting the reinforcing members of the floor panels.

I preferably secure the reinforcing members 3 of the columns together, by circular or octagonal bands 9, which are located above the tension members 5 and are secured to the vertical members 3 by means of rivets or bolts. The band 9 may be employed in securing the ends of the reinforcing members of the floor system in place, as will hereinafter be described. I also provide a hoop or band 10, which is located below the bracket 4 and is employed merely in assembling the members 3, and may be secured to the members by means of rivets, if desired. Spiral hoops 11 extend around the members 3, and are located between the hoop 10 and the channels comprising the members 5. These hoops 11 are designed to increase the comressive strength of the inclosed concrete, so that it will work economically in compression with the reinforcing members 3. 'A ring or octagonal band 19. is located on the tension members 5 and surrounds the members 3, being adapted to support the ends of the tension members.

The bracket so formed is located wholly within the iinished concrete floor slabs and eliminates the necessity of providing column caps, which are ordinarily employed and which are formed below the ceiling in the concrete structure.

In the drawings, I have illustrated a floor panel, which in eHect consistsof a floor slab provided with horizontally extending reinforcing members, which are inclined upwardly at the edges of the slab and which are supported on the bracket. In Fig. 2, I have diagrammatically illustrated the arrangement of the reinforcing members, for convenience of illustration. The horizontal portions of the members in the finished structure will be located near the bottom of the iioor slab 13. The reinforcing members of the floor panels are divided into different groups, the members of which are secured to different points on the bracket 1. In Fig. 2, I have diagrammatically illustrated a reinforcing member 15, which illustrates the arrangement of one group of members and is bent downwardly at its ends, so that it engages the band 9. A member 1G is shown bent upwardly at its ends, so that it may be supported on one of the plates 6 or 7 and engage the band 9. A member 17 is bent downwardly at its ends,

so that it may be supported on one or the other of the plates and also engage the ring 1Q, which is located on the channels forming the tension members 5. The reinforcing members of the other groups are bentl downwardly at their ends, so that they engage either of the plat-es, 6 or 7, secured to the tension members 5. Vith this arrangement, all of the reinforcing members of the ioor panelsare suspended .from the panel, and the inclined portion of each member is subjected almost exclusively to tension strains, which are transmitted to the column reinforcing members, by means of the bracket 4.

The octagonal arrangement of the brackets is advantageous, since the reinforcing members ofthe floor panels extending between adjacent brackets can be secured to parallel plates in the separate brackets, and consequently be of the same length. In the drawings, I have illustrated a number of reinforcing members, which extend across Vthe bracket and are supported by it, but are not secured to it. These members are illustrated at. 18 in Fig. 1 and are so bent that the suspending action of the bracket is accomplished.

The floor panels are formed so that the concrete is thinner near the centers of the panels, between the columns, or at the points of location of the slabs 13, and enough concreteis employed between the slabs and the columns to cover the brackets and the inclined portions of the panel reinforcing members. The reinforcing members 15 and 16 are employed only where extremely heavy loads are encountered and it is necessary to increase the `thickness of the floor panels, or to employ sufficient filler to raise the level of the nished iioor above the rods 15.

It will be apparent that the plates 6 and 7 Vmay be arranged inl circular formation, if desired, and that various changes may be made, without departing from the scope and the spirit of my invention.

What I claim isz- 1. A column bracket and floor construction, comprising, column reinforcing members, tension members located in the column bracket secured to the reinforcing members and radiating therefrom, plates surrounding the column reinforcing members and secured to the tension members within the column bracket, and reinforcing members for the iioor construction, secured to, and terminating at, the support plates.

2. A column bracket and fioor construction comprising, column reinforcing members, V-shaped tension members with their apeXes engaging said column reinforcing members, plates secured to the ends of adjacent V-shaped members and tension members in the floor construction secured to, and terminating at, the support plates.

3. A column bracket and floor construction comprising', Vertical column reinforcing members, tension members located in the column bracket and comprising channel bars bent to a V-sliape, each channel bar engaging` one of said vertical reinforcing members at its apex, support plates located between, and secured to, the ends of the channel bars, and tension members in the floor Construction secured to, and terminating at, the support plates.

4l. In combination with a concrete column and its vertically extending reinforcing members, V-shaped tension members secured at their apeXes to said reinforcing members and extending outwardly with reference to the column, support plates located between, and secured to, the ends of the tension members and compression members located between, and secured to, the ends of the tension members.

5. In combination in a concrete structure, a concrete column, reil'iforcing members for the column, brackets mounted on the column and` comprising outwardly eX- tending` tension members looped around the reinforcingl members, supporting members located between, and secured to, the ends of the tension members, and compression members located between, and secured to, the ends of the tension members.

ROBERT ANDERSON.

vVitnessesr WALTER F. MURRAY, E. W. MCCALLISTER.

@oplet of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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