US1595222A - Auxiliary reenforcement for reenforced concrete construction - Google Patents

Description

Aug. 10,1926. Lsssgmz4 v S. D. BUTTERW'ORTH AUXILIARY REENFORCEMENT FOR REENFORCED CONCRETE CGNS'SRUIJTI0N4 Filed Augusl, 1924 2 Sheets-Sheet 1 1,595,222 s. D. BUTTERWORTH AUXILIARY REENFCRCEMENT FOR REENFCRCED CONCRETE CONSTRUCTION Aug'. 10 19.26.

Filed August 16, 1924 2 Sheets-Sheet 2 Patented Aug. 10, 1926.

" rss SAMUEL D. BUTTERWORTI'I, 0F LANSING, MICHIGAN.

AUXILIARY BEENFORCEMENT FOB. IRfEl-NIEO:El/CEDfCO1\TCRIE1'JE CONSTRUCTION.

Application filed August 16, A19.24.. Serial No.; 732,385.

This invention relates toa reenforcing 4member for ,securing Vconcrete to the under side oflbeams The underwriters and most building codes require the `contractor to `-cover-zinlfheam with-at least two inches of eo 'nc rete for fire protection. This means that the .gI-beambr Vother steel section used in concrete'beam construction must'be entirely surrounded ,by concrete so thatthe loutsider :surface of ,the concrete Lis Yat least Atwo inches ,from any point of thelfheanm However, ,great diflicultyhasbeen: experienced in hold- Aing the e concrete `to the .bottom ofthe l-beam, as' the bott-om of the beam is smooth ,and the concrete ,thereover is suspended `,merely by the two inches .of concrete latv the side.`

@here .isgreatdanger of this portionofthe lconeretebeam peeling oli vand falling after ,the .building has been constructed, which,V

,mightcause seriousfdamage and loss of life.

Many devices have beendevised for ,hold- .ingthisconcretetothe .Lbeann but as feras .I know, .thesedevices have not proven en- .,tirely satisfactory. The deviceson themary.ket are ofsuchaconstruction:that they vwill slip and as 1these .reenforcingdevices need to ,be `spaced .,accurately, -v1t 1s quite .necessary that fthey should kstay put. It .has been the icustom .to wrap :these I-'beams with a wire ,O rsteel coil, `locating these Vwires atapproximat-elyone :foot apart. Butduringthe proc- .ess ,of `building the .box .frame vabout the I- `.beam -in preparation `for pouring the concret-e, these wire coils are easily misplaced :and there is a greatchance otthem all sliding .towards one end of lthe beam, thereby .leaving a great section of ythe beam without ,this necessary freenforcement. With {these devices, however, `it is necessary to also prende-spacers for correctly positioning-and e holding the mold box in 4correct relation with .respect to the I-beam, so that kthe min- Efimum allowance of two -inches of concrete may he maintained.

The object of my 'invention is to overcomethese numerous difficulties and l pro- .vide a reenforcing member which may be clamped to the Iebeam in such a way -that the same 'will not y'slip and will :remain put. In addition, my constructionincludes means @for spacing the mold box from Ythe I-beam,

thereby performing a double'function not v found in Vthe .devices in lthe prior artz In addition, my device may he ormedot a sta-mpand manufactured at very low" cest.

'ln fact the samemay besold at less costlthan 'thedevices now on the market and vtheyvare also labor saving devices since they are more readilyeand quickly assembledfto the 'Lbeam in preparation `for lpouring .the ,concrete.

ln the drawings:

Fig. l isa perspective view ot an showing my reenforcing clamps thereto.

Fig, 2 is a perspective of one of ,my clamps. Y

Fig. 3 is assection through an I-heam, shcwingthekelamp about tobe put on.

lflg.V Lis aside elevationof the I-.-beam, sh-owing my .reenforcing clamp secured thereon. Y

Fig. l5 is .a vertical ,section .through a concrete ,beam reenforced by l an .I-.beam `section :and showing my lreenforcing clamp isecured thereon. Y Y

.Fig 6 is a -sectional view lthrough an I- beamxsection used fora column, showing my reenforcing members securedthcreto. l

'Figa-'7 is a perspective .viewo myfclamps showing' Athe struck out .transverse `reeniorc- 4ing tongues.

`Fig. 8 ,is adetail of the blank used .for forming' ,the clamping members,

a designates an ALbeam that `is used .for reeutorcing a concrete beam, .the `concrete designated b, .as ,shownk in Fig. 5, to hold that portion ofthe concrete designated b1 lin place, `and `to .prevent rthe same `from falling ott" after :the vconcrete has set, I vprovide a ,reenforcingfdevice which is ,adapted 4to be secured to `this -I-beam as will know be described.

l .form .a .special fixture or Yflange clamp `of sheet metal form-ed from a stamping Vin such ;a vway as to provide `a `rspring vclip c heam, secured Ywith `the inwardly entendi-ng-sprfingggripping e jaws .or fingers d. Itis also provided with a depending' leg e, which serves :as a'spacer Afor locating the bottom fof the Y.mold 'trough 1n correct position with respect to the I beam. This special .fixture or lclamp is also provided with a side extension f, which serves as a spacer for the sides of tthe Amold box. The depending leg carried .by t-he fixture is pro-vided with an inwardly `struck out tongue g.

'This Yiixture may :be zforced onto the bottom flange 'of the I-'be am, as shown in'Figs. B and 5, the spring gripping fingers or CJI Cil

' struction.

d engaging the upper surface of this flange, and as the same is forced on, these gripping members will tightly grip and bite into the I-beam fiange and so securely grip the I- beam that there is no tendency 'for the clamp to slip or become misplaced. These clamping fixtures are secured on opposite sides of the I-beam, as shown in Fig. 5, the tongue g bridging the `gap beneath the I-beam to provide a transverse reenforcement for the concrete. fr steel rod 7L may be laid thereon, as shown in Fig. 1l, when a broad I-beam is used to provide a stronger transverse reenforcement for tying the concrete designated 1 to the central reen'forcing member of the I-beam.

These fixtures are normally positioned about one foot apart but sometimes they are positioned at a greater distance and there? for Ato provide the necessary reentorcement for the intervening space between each pair of fixtures, a reen'forcing rod z' is laid on top of the rods h` and is positioned longitudinally of the I-beam. These reenforcing rods may be secured together Where they cross by means of the Wire loop .7'. HoW- ever, I Want it understood that I am not bound to always use this longitudinally running reeniorcing member z', as there' are occasions when it is not necessary.

After these fixtures have been secured to the I-beam, the box `frame 7c is secured about the I-beam, the spacers f and e locating the sides and the bottom respectively oi the mould box in the correct position. The concrete is nouT poured and the same flows around these reenforcing fixtures and When the concrete is set all parts of the auxiliary reenforcing fixture are embedded in the concrete, thus securely tying that portion of the concrete beam designated b1 to the central reenforcing steel I-beam.

In Fig. 6 I show how my reenforcing ixture is adapted to be used in column con- In column construction there is the same requirement as to the amount ot concrete around the I-beam, and to provide means for reenforcing the concrete and for spacing the column mould with respect to the I-beam, I place a number of my fixtures on both flanges of the I-beam section, as clearly shown in Fig. 6. Thus, When the concrete is poured the same is sufficiently reenforced and prevents that portion of the concrete adjacent the outside flanges of the I-beam section from peeling oli' and falling after the concreteis set.

Fig. 8 shows a blank which is cut transversely as at l0; the flaps l1 being folded over on the dotted lines 12 to form t-he leg e. The sheet metal blank is also cut as at 13, the outer portions of the blank being curled back to form the spring clips c and the jaws or fingers cl.

In some of the claims We have referred to the'web ot the clamp underlying the flange and the spring fingers as gripping the top of' the flange. These terms are simply used relatively as a clear means of designating the parts. Gf course, it the auxiliary reenforcement be used 'on a roiuinn, strictly speaking, the flange has no upper and lower surface, but the flange can be read with this explanation in view Vhat I claim is:

l. An auxiliary reentorcement Jfor tying or supporting concrete on a heavy central reenforcement member orV core for conc-rete beams or columns, having in combination with a central flanged reenforcing core of a plurality of sheet metal flange clamps which may be secured to the centralV reen forcing core by springing the sheet Vmetal 2. A device for the purpose'specified,V

comprising a sheetmetal member 'formed to provide a relatively Wide spring gripping jaw, a laterally extending mould Wall spacer and a Vcombined mould Wall spacer and 'hanger substantially at right angles there-V to, the said combined spacer and hanger serving to supportV auxiliary reenforcements.

A device for the purpose specified, comprising a sheet metal flangeclamp formed from a single sheet of metal bent to form a pair of relatively Wide turned over spring fingers engaging the top or" one flange of. a reenforcing member, and provided with a depending portion having lateral projections for tying the surrounding concrete to the reenforcing member at the center.

4:. A device for the purpose specified, comprisino' a sheet metal flange formed into a web to underlie a flange of a. center reenforcement and provided With turned n up spring fingers engaging the top of the flange, said flange clamp further provided with a turned down leg member having a struck out tongue, said leg member and tongue serving to tie the concrete to the center reenforcement. i

An auxiliary reenforcement 'for tying and supporting concrete on a heavy central reenforcement member or core for con* crete beams or columns, having in combination With the central core, a plurality of independent sheet'metal flange clamps which may be secured to the flanges of the central reenforcing core by springing the sheet metal thereon, tying members, said clamps having integral mould Wall spacers and means for supporting said tying members for tying the surrounding concrete to the central core. Y Y

6. A reenforcement structure of the class described, comprising a sheet metal mem- IDT) ber provided with a Web arranged to underlie one flange of a central reeniforeement, and provided with turned up spring ingers engaging the top of the flange, transverse reenforeing means, said sheet metal inember being further provided with a projecting member for supporting said transverse means and additional reenfereing means supported by said transverse reenforcing means.

In testimony whereof I have afIiXed my signature.

VSAMUEL D. BUTTERWORTH.

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