US1708352A - barton - Google Patents

Description

April 9, 1929. ,L B 1,708,352

CONCRETE STEEL CONSTRUCTION April 9, 1929. F. M. BARTON CONCRETE STEEL CONSTRUCTION Filed Dec. 1925 2 Sheets-Shee t 3 Patented Apr. 9, 1929.

UNITED STATES PATENT OFFICE.

FRANCIS M. BARTON, OF CHICAGO, ILLINOIS, ASSIGNOR TO BARTON SPIDER-WEB SYSTEM, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CONCRETE-STEEL CONSTRUCTION.

Application filed December 3, 1925.

The invention relates to concrete steel construction. In steel reinforcement for beams, it is now common practice to provide a series of stirrups to support the reinforcing rods which extend longitudinally of the beam. In some instances, the stirrups are independent of one another, and in other instances a series of them are connected by bars rigidly secured thereto. The latter construction has the advantage of being placed in position as a unit in the form. A disadvantage incident to the unit constructions is that they are bulky in handling and transportation.

The primary object of the present invention is to provide a unit comprising a serles of stirrups which are connected together by bars extending longitudinally of the beam which may be folded for convenience in handling and to reduce their bulk in transportation. viding a structure'in which the legs of a series of stirrips are pivotally connected to longitudinally extending bars in such manner that the bars and legs may be brought together in compact relation until they have been brought to the concrete form for installation in a beam. Another object is to provide improved spacing and supporting lugs for the stirrup.

The invention consists in the several novel features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings: Fig. 1 is a perspective of a structure embodying the invention, the members thereof being spread apart for installation. Fig. 2 is an inverted plan, showing the structure in its folded or compacted position. Fig. 2 is a perspective of one of the lugs or feet for supporting the stirrups.

Fig. 2 is an elevation of said bracket with the stirrup therein. Fig. 3 is a section, showing the structures in operative position. Fig. 41- is a detail, showing the deformation in the legs of the stirrups for holding them against longitudinal movement with respect to the connecting bars. Figs. 5 and 6 are details, showing the connection between the stirrup legs and the connecting bars. Figs. 7 and 8 are details, showing the manner of notching the bar to-receive the stirrup legs and the deformation of the bar to pivotally connect the legs and the bar.

The invention is exemplified in a structure comprising a series of stirrups formed of This object is attained by pro-' Serial No. 72,858.

steel rods each comprising legs 10 and 11, a bottom cross member 12 and out-turned terminals 13 at the upper ends of the legs, all of said parts being integrally formed. Some of the stirrups are provided with downwardly and outwardly extending lugs or feet 14 adapted to rest in the corners at the bottom of the concrete-form in which the concrete beam is cast, to space the member 12 the desired distance from the bottom of the beam, so as to space and support reinforcing rods 16 which extend longitudinally of the beam above the bottom of the beam, as well understood in the art. The out-turned ends 13 are adapted to extend into the floor slab contiguous to the beam, leaving the tops of the stirrups open so the rods 16 can be placed from above onto the cross-members 12 of the stirrups. The legs 11 of the stirrups extend through holes 17 respectively in a bar 18. This bar thus connects all of the legs 11 at one side of the entire series of stirrups. In fabricating the unit, holes 17 are open at one side, as shown in Fig. 7, to permit the legs to be slipped into them, and after they have been placed therein, the metal adjacent the sides of the open end of the hole is bent inwardly, as at 19, to prevent separation of the legs from the bar while permitting relative rotation between the bar and the legs. To hold the bars 18 against relative vertical displacement with respect to the stirrup legs, each lug is cut and deformed, as at 20, to form lugs above and below the bar between which the bar will be vertically confined. The legs 10 of the entire series of st-irrups at the opposite side are similarly connected by a lower longitudinally extending bar 21 and an upper longitudinally extending bar 22. These bars 21 and 22 serve to space the stirrup legs 10, and are pivotally connected to said legs by holes 17 and indented portions 19 as aforesaid, and are confined against vertical movement on the legs by lugs 20. To space the upper portions of the stirrup-legs and the connecting bars inward- 1y of the sides of the beam, each of said bars is formed with outstruck portions 23 in any desired number, the outer edges of these portions being adapted to engage the sides 15 of the form used in casting the concrete of the beam. The bars 18, 21 and 22 serve as longitudinal reinforcing bars for the con crete beam, as well as spacing elements for the stirrups.

The stirrups and bars, to which they are pivotally connected, are fabricated as aunit,

and this is usually done in the shop where the reinforcement is made. When a unit has been 'asseinb'l'ed, it may be folded together, as shown in Fig; 2, sot'hat a large nunber' of units may be shipped in a comparatively small space the pivotal connections between the stirrup legs andthe bars making this possible. When the unit is to be installed, it is only necessary to spread tlrebars 1-8 from the bars 21, 22 into the position shown in F 1 and place it as a unitary structure in the 'iorm, so that-no individual placing of the stir-rups will be necessary; 'A turther characteristic of the unit is that it is adapted for beams of diiterent widths, because the pivotal connections between the bars and the stirrup legs permit the legs on one side to beswung towards the other'side a greater or less distance ifthe unit is to be used in a beam of somewhat less width than the maximum for which t is adapted when the le s are spread to thetfullest degree.

n practice, it has been found that a 1311i"; rality of bars connecting the stirrup legs one side and a single bar connecting stirrup legs at the other side aresuiiicient to keep the stirrups properly spaced The single bar is vertically olfset with respect to the plurality of bars-so that the inner edges of the bars can be brought into engagement with the stirrup legs on the opposite side of the stirrups, so that the legs at one side will be brought approximately into alignment with the legs at the other side.

Each lug it is formed of a single piece otsheet metal shaped to form a recess '30 con-- bent around the other sideot the stirrup to rigidly secure the lug thereto. Tongues 32 forming to one side of the lower corners oi the stirrups, so th at the leg, when seated in said recess, willbe positioned against verti-- cal and rotativ-e movement,- and with out ward-and downward extensions 31, which are of the desired length and shape to position the bottom members-23 of the stirrups above the bottom of the form and to position thestirrup legs inwardly of the sides of the beam-forming portions of the concrete-form and with tongues 32, and 34. which are integral with the lugs and adapted to be and are normally spread into open position, as SllOW11.lI1 Fig.2 and are bent Into 1 the position shown in Fig. 3 atterythe corner providing lugs of different heights or di mensions, the same reinforcing structure maybe diiierently positioned in the form.

In practice,

By attaching the lugs to the lower corners of the stirrups, they serve to support the stirrup vertically, as well as to hold it' against lateral movement. This lug exemplifies one [which can be produced a low cost and can be quickly attached to they stirrups.

The invention exemplifies a unit for con crete steel construction in which individually termed stirrups comprising legs and cross members are connected"together so" they may be unitarily handled, and which can be folded into a substantially flat struc ture for convenience in shipment and'h'andling prior to the installation or placement in the terms.

The invention is nottobe'understood as forth, {511166 these restricted to the details may be modified within the scopeofthe appended claims, without d parting from the spirit and scope of theiinvention.

Having thus described the invention, what desire to secure by Let" I claim as new and ters Patent, is: a I

1. In reinforced concreteconstruction, the

combination ot' a series of: individually formed stirrups, each or .sald stirrups con prising'legs and a cross member adapted to support reinforcing rods, and bars through which extend the legs at the sides of the stirrups respectively and inwhich they are pivoted to permit the structure to be colat the other side.

combination of a series of individually formed stirrups, each of said stirrup-s comprising legs and a cross member adapted to support reinforcing rods, and bars connec*- 111g the legs at the sides of the stirrups re:

2. In reinforced concrete construction, the

lapsed laterally to bring the legs at one-side approximately into alignment with the legs spectively and in which said legs are pivoted to permit the structure to be collapsed to hung the legs at one side approximately into alignmentwith the legs at the other *sid'e,z

the legs havingintegral means to'retain the base against ,c

3. In reinforced concreteconstruction, the

combination of a series of individually formed stirrups, each of said. stirrups com prislng legs and a cross member-adapted to support reinforcing rods, and bars connect-f ing the legs at the-sides of the-stirrups re-; spectively and in which they are pivoted to" permit the structure to be collapsed to bring.

the legs at one side approximately into align ment with the legs at the-otherside, the bars having open-ended slots through which the legs are extended and deformed portions to retain the legs in the slots, the legs having 1nent lengthwise ofthe legs,

integral lugs to retain'the bars'against move- 4. In reinforced concrete construetion, the combination of a series" of individually movement lengthwise oi? the formed stirrups, each of said stirrups comprising legs and a cross member adapted to support reinforcing rods, and bars connecting the legs at the sides of the stirrups respectively and in which they are pivoted to permit the structure to be collapsed to bring the legs at one side approximately into alignment with the legs at the other side, the bar being provided with means to space them from the sides of the form for the concrete.

5. In reinforced concrete construction, the combination of a series of individually formed st-irrups, each of said stirrups comprising legs and a lower cross member adapted to support reinforcing rods, bars connecting the legs at the sides of the stirrups respectively, and spacing and supporting lugs, each formed of a single piece of flexible metal provided with a recess for a portion of the stirrup and integral tongues adapted to be bent around the structure to secure the lug and stirrup together.

6. In reinforced concrete construction, the combination of a series of individually formed stirrups, each of said stirrups comprising legs and a lower cross member adapted to support reinforcing rods, bars connecting the legs at the sides of the stirrups respectively, and spacing and supporting lugs, each formed of sheet metal and with a recess to receive a corner of a stirrup between a leg and a cross member, and an integral tongue adapted to be bent around said corner to secure the lug and stirrup together.

7 In reinforced concrete construction, the combination of a series of individually formed stirrups, each of said stirrups comprising vertically extending legs and a lower cros member adapted to support reinforcing rods, and bars connecting the legs at the sides of the stirrups respectively, the bars being provided with integral outstruck portions to space them from the sides of the form for the concrete.

' 8. In reinforcement for concrete construction, the combination of a series of individually formed stirrups, each of said stirrups comprising a pair of legs and a cross member extending between the lower ends of the legs and adapted to support reinforcing rods, and a par of longitudinal members at the sides of the stirrups respectively, said members having integral portions thereof forming sockets in which the legs are pivotally mounted so as to permit the unit to be collapsed so as to bring the legs at one side thereof approximately into alignment with the legs at the other side.

9. In reinforcement for concrete construction, the combination of a series of individually formed stirrups, each of said stirrups comprising a pair of legs and a cross member extending between the lower ends of the legs and adapted to support reinforcing rods, a pair of longitudinal members at the sides of the stirrups respectively, said members having integral portions there of forming sockets in which the legs are pivot-ally mounted so as to permit the unit to be collapsed so as to bring the legs at one side thereof approximately into alignment with the legs at the other side, and legs on some of the stirrups adjacent the intersections of the lower ends of the legs and the ends of the cross-members, for spacing the unit from the bottom of the concrete form.

Signed at Chicago, Illinois, this 20th day of November, 1925.

FRANCIS M. BARTON.

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