US994091A - Reinforcement for concrete constructions. - Google Patents

Description

` H. BRUSSEL.

" RENYORGBMENT POP. CONCRETE GONSTRUUTIONS.

Patented May 30, 1911.

APPLIUATION FILED MAR.5. 191D. 994,091

Inventor by A/L 1 1' Atty HUGUES BRUSSEL, OF ST. 4LOUIS, MISSOURI, ASSIGNOR v'.lO REINFORCEI: CGNCREC COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF BIISSOURI.

REINFOBCEMENT FOR CONCRETE CONSTRUCTIONS.

concrete girders, beams, fioorfslabs, and the like, to bind-the longitudinal reinforcement in the tensionchordto theconcrete forming l.the compression chord .and to carry the shearing stresses to whichsuch structures are sub1ected, and to the transverse or hoop members which are used to tie together the `longitudinal reinforcement of concrete columns. i

The stirru s heretofore used in'4 the rein- 'forcement o horizontally disposed concrete structures have' consisted'of sin le lengths of strap-iron or wire, or of doub ed lengths of wire having the two strands spaced a short distance apart, which have been bent into shape and have had their ends bent over at an angle to aiord them an anchora e in the concrete; andthese stirru s were either placcd'individually in the mo ds and there held in position While the concrete was being poured 0r were bonded in advance to the longitudinal reinforcement so as to form with it a skeleton frame-work which was handled as a unit and which held the parts in proper position in the molds.

The object of my invention is to reinforcement of the character in icated, adapted for use as stirrups, column hoops, or otherwise, which can be made more cheaply, which can be handled collectively or l.in sections without being bonded to the other reinforcement, and which. possesses other features of advantage over that previously -known and used for similar purposes.

To this end the invention consists,

broadly, in what may be called a continuous transverse reinforcement, the construction Specification of Letters Patent.

` Application led March 5,1910. Serial No. 547,398.

rovide Patented May 30, 1911.

and features of which will clearly :qipear from the following description, having reierence to the accompanying drawings in which-` i Figure 1 is a View either in plan or cles J vation illustrating the blank which is formed as the first step in the construction of one form of a. continuous stirrcp; Fig. il, a perspective view of a completed stirrup made from the blank shown in li41 ig. i g Fig. 3, an end view of.- the said completed. stirrup, showing a short cross-rod as used in combination therewith to. form an inverted 'stirrup; Fig. 4, a 'broken View, in perspective and on a somewhat enlarged scale, of a slightly modified form of the invention; and.Fig. 5, a broken View, also iii perspec tive and on an enlarged scale, illustrating another modification adapted for use either in a concrete beam or column` As illustrated in the drawings f. strip o1" suitable material of any desire section` preferably cold-drawn steel wire without oil .or grease and taken from a spool as required, is first bent back and Aforth in onr-v plane into a blank of zigzag or rack form,

comprising parallel transvfA so sections andintermediate connecting cizons G alternatmg on the two opposite sides, and then the sides of this flat blank are bent up inte planes usually at right angles thereto, as shown.

The arallel transverse sections 5 of the blank, which form the individual stirrup or hoop members of thc continuous reinforcement, are made of the length required for the purpose, while the connecting members 6 are given such lengths as to properly space the stirrup or hoop members., which, in he case of stirrups, are usually placed progres.- sively nearer one another toward each end of a girder or similar structure in order to offer a 'proportionately increasing resistance to the vertical shearing stresses which, when the structure is uniformly l Wed, increase from zero at the center of its span to a inaximum over the supports.

A 4continuous stirrup can he made either in entire span lengths, shown in Fig. or, as has been found. convenient in piaci'.

in sections of from two to four feet in 1 the length of a gli-der beneath which the length, in which latter case the stirrup membersmay, for convenience, be given a uniform spacing throughout a section and a different spacing in the different sections, as illustrated in Fig. 4. For example, sections may be made in lengths of two feet with stirrup members spaced three inches apart, sections three feet 1n length with stir* rup mem ers spaced six inches a art, and sections our feet in length witi stirrup members spaced one foot apart; and, by

' usin one or two of the long sections in the the place where they mid le of a span and one or two of the intermediate and of the short sections at each end thereof, the sections can bemade to fill out structures varying considerably in length. These sections are'usuall -bent u into the Hat zi zag form, roper y space in the shop, am? are shippe in' that form to there bent up into'stirrup form.

v The short rods 7, placed across the upper endsof the Fstirrup members so as to. pass beneath the spacing connections 6 on either sider asv illustrated 1n Figs. 3 and 4,V serve as inverted stirrups to crown and so Ihold down in plaoein the concrete theends of the longitudinal reinforcing rods, which in struc-V tures des' ed to act as continuous girders are carrie up in to`the upper chord thereof over and adjacent tothe supports, and may also serve as tensile reinforcement in the flanges of T-beams and girders. When the reinforcementis to be used in columns, the ends of these short rods are Preferably bent back and hooked around the spacing eon nections, as illustrated in-Fi 5, thus tying together and completing the oop members; and the same means may advantageousy be used for tying together the upper en s of the stirrup members used in reinforcing certain types of rders and beams, especially such as are reinforced in their compression as well 'as tension chords. As thus connected together to form a continuous transverse reinforcement, the individual stirrup or hoop members can' not only be handled collectively, as a unit, but will always retain their proper position and spacing when placed in the mold and may serve as guides and su ports for the other reinforcement While tie concrete is being poured. The longitudinal spacing connections not only provide convenient means for securing or to which to secure such cross rods asmay be used to form inverted stirrups or totietogether the ends of the hoop members, as the' case may be, but also afford the necessary anchorage for the upper ends of stirrup members, without other bending, While at the same time (providin a series of inverted stirrups exten ing continuously throughout are to be used andends of the uniformly spaced rods usually used in'ircinforcing the floor-slabs' may be passed and by which they will be held down 1n osition in the concrete.

ile I have shown and described my invention in detail as it has actually been practiced and in what I now regard as the best form for its application, it will, of coursefbe understood that'these details may be variously modified Without departing from the s lrit or sacrilicing the advantages thereof. u's, as examples of such modifications as will be-obvious to any one skilled in the3 art, the vlongitudinal s acing connections may be curved either upwardly or outwardly instead of being 'straightythe transverse stirrup or hoop members may be bent up :1t-either an acute or obtuse angle or may be given a curved or round form, and stirrup members, instead of being made of a width to embrace all of the longitudinal reinforcement used in the structure, can be so made as to embrace only a single longitudinal rod or single pair of straight and bent .rods and as many continuous stirrups used as there arerods or pairs of rods in the structure. Suchother modifications may also be made as fall wit-hin the scope of the ap nded claims.

by Letters Patent, is-

at I claim as new,`and desire to secure l." A continuous unitary stirrup reinforcesi es and the end o a side of an adjoining stirrup member and forming a longitudinal cradle which is open along one side and is adapted to be placed in posit-ion in a mold independently of and to receive the longitudinal reinforcements.

2; A continuous stirrup reinforcement for concrete beams and like structures, comprising a plurality of independent sections each of which contains a plurality of parallel U-shaped stirrups and longitudinal spacing members integrally connecting one end of each stirrup with an end of an adjoining stirrup and forming a. longitudinal cradle open along onc side, said spacing members being short-er in the end sections than in the intermediate section or sections.

3.`A continuous transverse reinforcement for concrete structures, comprising a lurality of parallel transverse mem ers adapted to embrace the longitudinal rein forcement of the structure and integrally A connected together by longitudinal spacing members joining 4one end of each transverse In witness whereof, I have signed my member Wlth an end of an adJolmng transname 1n the presence of two wltnesses.

verse member and forming a longltudinal w 1 P- oradle which s open along one side and HUGUES BRUSLL' 5l transverse tie-rods closing the o en side and Witnesses binding together the two ends o each trans- JOHN P, WALSH, verse member. L. VITERBO.

Copies of this patent may he obtained tor ve cents eden, addressing the Commissioner of Patents,

i Washington, 1D. 0.1*

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