US1096685A - Reinforcement for piles, columns, girders, &c. - Google Patents

Description

R. A. CUMMINGS.

REINFORCEMENT FOR FILES, COLUMNS, GIRDERS, dw.

APPLICATION FILED 1,11". 3, 1m.

Patented May 12, 1914.

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mvsm'org nan "LIL lulu I lli WITNE$SES R, A. CUMMINGS. RBH'TnR-GEMENT FOR FILES, COLUMNS, GIRDBRS, 6w.

APPLIGATION IILED JAN. 3, 1911.

Patented May 12, 1914.

2 SHBBTS-BHBET 2.

INVENTOR ROBERT A. CUMMINGS, 0F PITTSBURGH, PENNSYLVANIA.

REINFORCEMENT FOR PILES, COLUMNS, GIRDERS, 8w.

Specification of Letters Patent.

Patented May 12, 1914.

Application filed January 3, 1911. Serial No. 600,594.

To all whom it may concern:

Be it known that I, ROBERT A. CUMMINGS a resident of Pittsburgh, in the count 0 Allegheny and State of Pennsylvania, ave invented a new and useful Improvement in Reinforcement for Piles, Columns, Girders, &c. of which the following is a specification.

This invention relates to reinforcements for concrete piles, poles, posts, columns, girders, slabs and the like.

' The object of the invention is to provide a simple and eflicient means for holding the main reinforcing members of such structures in proper relative positions when embedding the same in the cement.

Cement iles, poles, posts and the like must be mo dad in horizontal position, gird-- ers are always molded in horizontal position, and columns may be molded in that position. The main reinforcing members extend longitudinally of these structures and necessarily are of considerable length. Hence more or less difiicult is experienced in bolding them spaced at t e proper distance a art and in the pro er position in the mol so that they will uniformly disposed in the finished structure.

The purpose of the present invention is to provide a simple vspacin ring or member which will securely hol the longitudinal members in proper relation to each other.

The invention comprises the construction and arran ment of parts hereinafter described an claimed.

In the accom anying drawing Figure 1 is a side view 0 a rtion of the metal re inforcement for t e pile, pole, post or column with my invention applied thereto; Fig. 2 is a cross section of the same; Fig. 3 is a. perspective view on an enlar edlscale showing one manner of securing t e longitudinal reinforcin member in the spacing ring; Fig. 4 is a similar view illustrating a mo ification; Fig. 5 is a perspective view of the clip for securing the hoops or bands to the lon 'tudinal members; Fig. 6 is a side view o a reinforcement for a. continuous girder showin theinvention applied thereto; Figs. 7 an 8 are cross sections taken respectively on the lines 7-7 and 8-8, Fig. 6; and Figs. 9 to 12 are detail views showing other applications of the'invention.

The reinforcement for a pile, pole, post or column comprises a suitable number of longitudinal members 1 which may be either round or deformed bars, small sections of angle, T, channel or other bars, or other suitable metallic bars. As many of such longitudinal bars will be employed as necessary or desired, varying with the size of the finished structure, with the load to which it is to be subjected, and with the conditions of use. It is customary to use in conjunction with these longitudinal reinforcing bars a suitable number of endless bands or hoops 2 encircling the longitudinal members and suitably secured thereto. These hoops or hands are usually made of thin hoop or band metal and their purpose and function is to encircle a considerable portion of the body of concrete. They are too thin and flexible to hold the longitudinal members properly spaced apart when lying in horizontal position, as is the case during molding. The means for securing the bands or hoops to the longitudinal bars may be of various forms, such for instance as shown in my Patent No. 879,148 of February 18, 1908, or

in my Patent No. 828,931 of August 21, 1906,

but which preferably comprises a clip 3 constructed as shown in Fig. 5. This clip is formed of spring sheet metal and has two legs 4 each provided with an edge notch somewhat greater than a semi-circle and having the projecting portions 5 at the edges of the notches adapted to be bent to one side to permit the clip being slipped onto the longitudinal rods 1 and then bent back to normal position to retain the rods.- The back or loop portion 6 of the clip is quite long and narrowed as shown. It is arranged to receive the band 2 between itself and the rod 1, after which the sides of the projecting part 6 are pinched together to tightly clamp the band 2 t0 the rod 1.

The spacing means for the longitudinal bars while being molded comprises rings 8 which will be placed at suitable intervals longitudinally of the bars 1, and which are arranged inside of such bars. These rings are preferably of fiat metal arranged with their flat faces transverse to the axis of the structure, to reinforce the same and resist transverse deformation or breaking, and on their outer or peripheral faces are provided with notches '9 to receive the longitudinal rods 1. These notches are of such depth that after the rods are placed thereinthe metal at the edges of the notches can be slightly upset or peened as shown at 10, Fig. 3, to secure the rods in the notches. Only a slight deformation of the metal is necessary to hold the rods so securely in the notches of the ring that the whole structure can be suspended from one of said rods.

Fig. 4 shows a slight modification in which the notches are somewhat deeper and pro-' rided at their outer edges with projecting portions 11 which can be bent sidewise or normal to. the plane of the ring, and after the rod is placed in the notch one or both of said projections are bent back into the plane of the ring and thuscserve as a means to prevent the rod from escaping from the notch. Figs. 6, 7, and 8 show the same principle applied to a girder or slab. Here the usual longitudinal bars 1 .are disposed in the top, and bars 1 in the bottom of the girder and are held properly spaced by the internal annular spacers 8*, identical with the rings 8 except that instead of being circular they conform to the cross sectional shape of the girder or slab. Any desired number of longitudinal bars 1 and 1 can be held by these spacers, depending on the width of the girder or slab, or the load to be carried thereby.

With continuous girders supported be tween their ends, as in Fig. 6, it isdesirable to introduce zigzag bars 12 to take care of the change of stresses in passing over the points of supports 13. These zigzag bars 12 can also be held by the spacing members 8*, as shown.

In the manufacture of piles, poles, posts or columns according to this invention the metal reinforcement consisting of the longitudinal members 1 and hoops or hands 2 are assembled in the usual way, and spacing rings 8 are placed inside of the same at suitable intervals apart to hold the longitudinal members in proper relative positions when lying horizontally, and the metal at the edges of the notches 9' is deformed or bent so as to secure the longitudinal members to the rings. While the metal is being bent or deformed, the hoops or bands 2 act as ties to hold the longitudinal members in place in their notches,.so that the entire unit can be readily and easily handled during its final assembling. In the case of girders and slabs the hoops or bands are, of course, omitted, but the other parts, including the zigzag members when used, are assembled as described.- The spacing rings are placed sufficiently close together so that the longitudinal bars will not sag materially between the same. The reinforcement in this condition is then placed in a horizontal mold or over centering, and either supported from the bottom, but in the case of piles, poles, etc., preferably suspended'from above by wires or the like, and the concrete then filled into the mold and rammed tight. The spacing rings described hold the bars sufiiciently securely'so that they cannot be displaced by the weight of the concrete or the force of ramming the same,- and hold said bars substantially straight. As a consequence the longi tudinal reinforcing members in the finished structure are substantially straight, are uniformly distributed throughout the concrete, are spaced the proper distance apart and located substantially a uniform distance from the surface of the concrete so as to develop their maximum efficiency. The spacing members described add very little to the cost of the finished structure, and require only a small amount of labor to manufacture and apply, and save materially in the handling and manipulation of the reinforcement in placing in the mold and during ramming, as well as resulting'in a morev eflicient and complete structure.

Fig. 9 shows the principle applied to a narrow girder having a single compression member '1 and a single tension member 1". The spacer comprises a simple plate 8" notched at its ends to receive the longitudinal members and hold them in place. This spacer may also be used in horizontal position in slabs and the like to hold in proper position members which lie in the same plane. a

For two series of longitudinal members lying in adjacent planes a spacer such as shown in Fig. 10 may be used. This comprises a plate 8 provided in its edges with notches for receiving the two series of rods,

to wit, the upper series 1 and the lower ser1es 1, these being held in the notches'by upsetting or peening the metal at the edges of the notches as shown. This plate may, or may not be provided with legs 15 to con tact with the centering 16 and hold the metal reinforcements at the proper elevation.

Figs. 11 and 12 show a plate 8 notched at its ends to receive the bent ends 17 of tension rods 18 and 19, and serving as a splicing means for said rods. Theplate is upset or peened at the notches to secure the ends of said rods. This plate may ormay not be provided with edge wings 20 to be wrapped around the rods 18 and 19 to hold them in place. A separate ring or like means may be used in place of these wings.

What I claim is: A reinforcement for concrete piles, poles, posts, columns, girders, etc. comprising longitudinal reinforcing members, spacing members each consisting of a flat annulus located in a plane transverse to the longitu dinal members and between the same and provided in its outer peripheral edges with notches in which the longitudinal members are seated, and having the metal of said edges adjacent said notches deformed to secure the longitudinal members in place, and

- binding members comprising endless hoops 0r bands encircling said longitudinal members and arranged to hold the same in said notches while being secured therein, said binding members also acting as circumfen ential relnforclng tles or bands. 10

In testimony whereof, I have hereunto set

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