US951150A - Reinforcing unit for concrete. - Google Patents

Description

/z@ (W I @Ma MW s. B.` RUSSELL.- BEINFORCING UNI'I'v FOB CONCRETE. APPLICATION FILED FEBJ, 1909,

-951,150. E Patented Mar.s,191o.

l ;*1 I G L CU E J. J'-

E. ,Fr t f3- "RP 'E- .UF/3) 'e1 )PH WITNESSS i SILAS BENT RUSSELL, OF ST. EOUIS, MISSOURI.

REINFORCING UNIT FOR CONCRETE.

Specification of Letters Patent.

Application led February 1, 1909. Serial No. 475,449.

f'b all whom it may concern:

Be it known that I, Suns BENT RUSSELL, residing in the city of St. Louis and State of Missouri, have invented a new and useful Improvement in Reinforcing Units for Concrete, of which the following is a full, clear, and exact specification, reference being had to the accompanying drawings, which form a part thereof.

My invention relates to metal reinforcing used in connection with concrete for the purpose of stiiiening and strengthening those parts of structures subjected to compressive and 'tensile stresses, and it belongs to that type of reinforcing wherein the metal part of a beam or girder is made up as a unit in the shop and then put bodily in place on the structure where it is to be used, thus avoiding any chances of error in the construction of the beam or girder due to carelessness or lack of skill on the part of the Workman.

The object of my invention is to provide a means whereby the proper reinforcing for concrete beams, girders, columns, and similar parts of structures made up in whole or in part of reinforced concrete may be made in the shop 4and then shipped and erected in place as a complete unit, and at the same .time providing said unit with means whereby the concreteA 1s mechanically bonded to the rein-- forcin My invention is fully shown in the accompanying drawings where similar letters are used to designate similar parts.

Figure l is a view looking at the side of a unit; Fig. 2 is a View of a section along the line 1 1 of Fig. l; and Fig. 3 is a View of a horizontal section along the line 9.--2 of Fig. 2.

Referring to the figuresJ is a web having attached thereto the flange I. At the edge of the web opposite the tia-nge I, there is a head, G, shown as a bulb in Figs. l and'Q. Projecting outwardly from, and preferably at right angles with, the web J are barbs for the purposes of being embedded in the concrete and providing a mechanical bond between the unit and the concrete .adjacent to it. In Figs. l, 2, and 3 these barbs are shown at C, D, E, and F, where they are made by unching holes through the web J and ben ing the pieces punched from the holes` so that they will project outwardly from the web as indicated in the figures. The barbs are referably arranged at the top andbottom of) the -web and on both sides thereof, so as to form a bond to hold the concrete in place on both sides ofthe web. The form of barbs shown in Figs. '1, 2, and 3 are provided with openings, P, adjacent to the barbs through A which the concrete passes land tends to strengthen the bonding between the unit and the concrete adbe in vertical planes, thus making it easy to pack the concrete under and around them. the unit shown in Figs. 1, 2, and 3, is made of a special rolled form similar to the ordinary bulb 'oeam of commerce.

- lVhen it is desired to use one of theser units in a structure for the purpose of rein forcing a concrete girder or beam, the load to be carried thereby is determined and then a rolled member of the proper length having a web with its accompanying flange and head piece of the proper size and thick- Patented Mar. 8, 1910.l

ness, is chosen and the barb members formed on the web at the shop; then the unit thus formed is taken to the place where it is to be used and put in position where the rein- -forced `concrete beam is to be.

A suitable boX or frame, such as is well known to those who do reinforced concrete work, is built around the unit so as to have its internal dimensions those required for the reinforced concrete beam or girder; and then the concrete is poured into this box around the reinforcing unit and thoroughly tamped and v.made to cover and engage with the barbs and to pass through the openings P adjacent thereto. The reinforcmg unit is preferably put with the iiauge I at the bottom so that it will take up most of the tension to which the reinforced concrete beam may be subjected and the headG is placed at the top. The head G is made smaller than the iiange I, because the compression to which the reinforced concrete beam may be subjected will be almost Wholly taken up lby the concrete, while the tension being on the lower part of the beam will be taken up-'by the flange I. Shear andother vertical and diagonal stresses in the beam will be taken up by the web of the unit. The barbs and the holes adjacent to them mechanically bind the concrete tothe reinforcing unit so that the two act together as one, thus increasing the strength of the reinforced concrete beam. f j,

lt is evident that this unit is adapted to be used not only in reinforced concrete subjected to both tension and compression, but also in columns and wherever it is necessary te have a reinforced concrete member that- ;ubjected to either tension or compression c beth.

llfliile the ilange I is shown at the bottom of the web J and the part G is called a "t iced, it is evident that this is only done the purpose ofillnstration in the spe- Aform vshown in the drawings, and to the beam upside down so that the (ge would be at the top and the head at bottom, would make no material difgg terence as to the manner of action of the unit ina reinforcedconcrete structure.

The position, size and shape of the barbs on the web may be varied, and the size of the weband the shape and size of the flange and head may be adapted to suit the require-V ments of ditlerent conditions.

Whatjlf claim as new and desire to secure by Letters Patent, is:

l, it, reinforcing unit for concrete consisto'a web having flat barbs projecting outwardly therefrom, said barbs being arranged in two rows one near the top and one near the bottom of the web and being formed of material punched out and bent biaelr, from the Web so as to leave an opening adl jacent to each barb and having their flat sides in planessubstantially at right angles with the length of the unit, the barbs of each rowv being arrangedk so that they project alternately from opposite sides of the .Web, and a ila-nge on one, edge ofthe web,

substantially as described. 2. reinforcing; unit for concrete consistlng of a web having iatbarbs projecting outwardly therefrom, said barbs being arweb, a flange on one edge of the web, and a head on the web opposite tlie ange, substantially as described,

In testimony whereof I have signed my name to this specification in t-he presence of two subscribing Witnesses.

1 S. BENT RUSSELL. Witnesses: 'ELLA JUNE,

Trmnnsa SUEME.

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