US1321786A - Support for metallic reinforces in concrete construction - Google Patents

Description

D. W. BROOKS. SUPPORT FOR METALLIC REINFORCES m CONCRETE CONSTRUCTION.

APPLICATIONv EILED APR. 4. 1918.

Patented Nov. 11,1919.

TINT TIN UNITED STATES r PATENT OFFICE.

DAVID W. BROOKS, OF NEW YORK, N. Y., ASSIGNOR TO CONCRETE STEEL COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

SUPPORT FOR METALLIC RETNFORCES TN CONCRETE CONSTRUCTION.

Specification of'Lctters Patent. Patented Nov. 11, 1919.

Application filed April 4, 1918. Serial No. 226,590.

To all whom it may concern: 1

Be it known that 1, DAVID WV. BROOKS, a citizen of the United States of America, residing in the city, county, and State of New York, (whose post-oflice address is 42 Broadway, New York city, New York,) have invented an Improvement in Supports for Metallic Reinforces in Concrete Construction, of which the following is a specification.

This invention relates generally to supports for metallic reinforces in concrete construction and more particularly to a device which may be used to advantage in. supporting the so-called head rods upon which the tension bars are laid in the well known flat slab construction or in the construction of beams in concretebuilding work.

The principal object of the invention is provide a device of the character described" which can be economically manufactured and which is adapted to support a so-called head rod at any one of several distances above the centering.

For illustrative purposes a preferred em bodiment of the invention is shown in the accompanying drawings wherein,

Figure 1 represents a blank from which the support is formed,

Fig. 2 is a side elevation of an illustrative embodiment of the invention,

Fig. 3 is an end elevation,

Fig. 1 is a top plan view,

Figs. 5 the support to a head rod, and

Figs. 7 and 8 illustrate a typical use of the support in concrete construction work.

In concrete construction, the requirements of different specifications call for the tension bars at slightly different distances above the centering and it is desirable to have a bar supporting device which will be adapted for use under varying circumstances, thus obviating the necessity of keeping in stock a large number of supporting devices difiering only by perhaps a fraction of an inch from other similar devices. I therefore provide a device which may be used to support bars above the centering at any one of a plurality of distances which may be called for,

and for illustration I have shown a device which may support a bar at any one of four different heights.

Referring to the drawings Fig. 1 shows a blank which may be stamped'out in the form and 6 illustrate the fastening ofshown and thereafter appropriately deformed to complete the supporting device. It will be noticed that very little of the metal of the original rectangular piece is wasted. This device is preferably made of sheet metal and, as will be seen from Fig. 1,

comprises a body portion 10 to which the necessary rigidity may be imparted by ribs 11. Four longitudinal slits 12 are made in the blank and the material between the cut and the outside edge of the blank is formed into four supporting legs 13 of which the upper one in Fig. 3 are bent to the left and the lower ones to the right. An irregular shaped cut 14 is made in one end of the blank leaving projections of metal which similar irregular cut 17 is made in the other end of the blank and projections of metal bent at right angles to the plane of the blank to form supporting legs 18 and 19. At each end of the blank is a cross-strip of metal 20 which is bent over at right angles to the plane of the blank to form a rod tie piece, which will be later referred to.

It will be readily observed that the support is substantially symmetrical, each end being of substantially the same configuration so that either end may serve as a base to rest upon the centering. However, the seats for the head rod designated by 21, 22, 23 and 2 1 are at different distances from the far end of the support. If the seat 22 is used with the support in the position shown in Fig. 2', the head rod will be held at maximum distance from the centering. Seat 21 will hold the rod slightly nearer the centering. If the support is turned upside down from the position shown in Fig. 2 either one of the seats 2-3 or 24 may be used and the head rod held by seat 2d at minimum distance from the centering and by seat 23 at slightly greater distance from the centering.

Thus the illustrative device here shown provides four positions for the head rod which may be so related that the support can be used under a larger variety of circumstances than would be possible with a support having only one seat.

It is desirable to attach the support to the-head rod so that it will not be displaced prior to the pouring of the concrete and for this purpose tie strips 20 are provided.

Figs. 5 and G showthe manner of fastening the support to the head rod. If the seat :22 1s used, as shown in Fig. 5, the tie strip may be cut at a point indicated Joy the numeral 25 in Fig. 4 and bent downwardly and around the head rod" which is designated as 26 in Figs. 5 and 6. If the rod'is to be placed upon the seat 21 the tie strip maybe cut at 27 and similarly bent around the head rod. If the support is inverted so as to use the seats 23. and 2% th tie-strip 29 are bent in the usual manner and lie across the head rod While the tension bars 3O of the intersecting girder lie over the bars 29. Vertical rods 31 are shown to illustrate therelation of the tension bars to the 7 vertical bars of a column indicated by dotted lines.

ltiwill beunderstood that the invention may be variously modified and embodied within the scope of the subjoined claims.

I claim as my invention:

'1. A device for supporting reinforcing ba rs'in'eoncrete construction comprising a sheet metal plate deformed to provide sym- 'metrically"located"supporting legs and having a plurality of bar seats-located at different distances from the base ends of said device and also provided with means to retain a supported bar upon a selected seat.

2. A supporting device for metallic reinforces in concrete construction comprising a symmetrically deformed metal plate adapted to stand on either end and having oppositely located bar seats spaced at unequal distances from the opposite ends of said device, and bar tie pieces adjacent said bar seats.

'In testimony whereof, I have signed my name to this. specification this 1st day of April 1918.

DAVID W. BROOKS.

Copies of this patent may be obtained for fiye cents each, by addressing the Commissioner of Patents, Washington, D. G.

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