US905480A - Reinforcing-bar for concrete structures. - Google Patents

Description

A. THMS, REINFORGING BAR FOR CONGRETE STRUGTURBS APPLIOATION FILED SEPT 28, 1907.

Patented. Dec. 1, '1908 A. THUMAS. RBINFORGING BAE PoR CONCRETE STRUCTURES. APPLIOATION ILED SEPT. 28, 1907,

905,480. Patented Dee. `1, 1908.

2 SHEETS-SHEET Z 'Umitnese Inventor @y y um I :ummm

,To all 'whom 'ii @my cm2/nem:

' ii; hmmm that i, AWLA Tix-mmm, c'ii-- man mi? tim United States, residing; im troia.) .in th@ county @if ifajfu, ,Stilte of Bvimiijgam inw liu Haw md usaeui hw )Veilig-Bars U01 and i d@ declare iba). iiif m bf: :i fully cie/m3 md am@ maripu auch Wiii enable L10 which liz @ppm-- 'the Erima, mfiiice u me? my may e .i x1 .C

The ini/miti.

, wiimui" fiiiggzsi w. which 1M M2' in; impi'wei bm: Fig, 15 :i plain @W m' itiwf: ifreimiml. membm: with 'the di- 'a'i'ggiaii Shear membarsi @mittal iii" 3. is n zgigiiimimy View m pespectiv@ of a pom-ion fui/tained by 'dicV @im mim w Cim@ 'wil'i smid tension ,member Shear .mamd

iie'as nf :i cifimfzicei" in Qsabiisii, :1 fiim bond bfi'ifvwii iii cemeeufij'uious imdy and the "Lem Simp. numb ,if I

Ch pin' am ivf xfx'ni'ese tha pi'fibabie iin@ oi fracture ,newly at righi, zngie iiheiecT providing at iie same tim@ for a proper dsti'ibuon 01"' shear members in the @onorata sf-ructuie 215110 properly counteract 'ihe Sifez'iiii'ig stresses- .Such :x bm: Qi* stime-` Lure ia; simwii 'in the diziwings forming a @am mi? iiis Specification; wherein 1 riesig imminent.,

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ami sin pnsiinned and. flying; in i nates the tension member which is a Ametal bar Tshape in cross section, thereby allerding the lateral flanges 2. To enable the attaehment of the shear members to the tension member, the flanges 2 are provided with a. plurality of opposed slits 3 at an angle of 45 to the axis of the tension member, one of the marginal portions of each et the slits by the operation et' cutting being raised or curved upwardly, as shown at It, thereby opening the slits so as to allow the tension members to enter freely therein.

'lhe tension members as will be seen on referring to Fie. 7 are formed of vFlat sheet metal of the requisite gage and are lirst eut in straight lengths after which their `end portions 5 are bent upwardly on a line eross` ing the body portion of the shear member at an angle of' about e5", said end portions standinf at right angles to the body of the shear member and parallel to each other with their inner faces in substantially right angle planes. The length of the body por.

tion G ol the sheer members is equal to the diameter ot the central portion of the ten sion member, and the shape of the shear members is sueh as lo enable their end portions 5 to be entered in the diagonal slits 2l from the under side of the tension member.. while the angle at which the end portions ol` the shear members are bent causes said end portions when introduced `in the slits ot the tension member to project obliquely to the tension member when the body portion t3 ol the shear `members is Caused to lie flatly against the under face olE the tension mem-Y ber, as shown in Figs. 5, (l and 14, the angle at whie` he end portions of the shear mem-- bers projet-t trom the tension member. being at about fl-5o to a per} e11dieular. After the shear members shall have been placed in the slits of -tlie flanges ot the tension member with the body portions ot the snear members Crossing; the under l'aee thereof, tihe tension members are securely locked to .fthe shear member by driving,v or forcing' the upwardly turned nun-grins 4- o't the slits downwardly against the inclined sides of the shear members in a plane with the major portion ot' the flanges 2, as elearl y shown in Figs. 5 and (l, thereby 'torn'iing an abuttim;` shoulder whieh serves to resist any longiti'idinal lhs-r t upon the shear members in the direetion ot the tension member and lockingy the shear members firmly to the tension member.

In the making of eonnnereial bars, the inclined slits for the shear members in the flanges ol' the tension member will be located at the probable point ot' orrori-enne el' the shearinj-l Stress in the beam in which the bai` may be placed. Should it be necessary to 'provide tor extraordinary resisl'nme against shearing stresses, the slits in the [langes of the tension member may be located that the shear members will be distributed in the concrete body in. manner to resist or connteraet any predetermined shearing stresses to which the beam or concrete body may be subjected. y

By making the slits in the flanges of the tension member diagonal, shown. the shear members when placed therein are caused to assume an ineline at an angle el" substantially 45 with respect to the tension member, a position in which they are best calculated to traverser the probable line ot fracture. lt will also be noted that the elr lique form of the slits enables the emi ley ment of shear members ot' a width greater sa me time keepingl the shear n'nnnbers within theplane ol` 'the tension men'ioer, allerdinoj the use oi' shear members'ot ,greater transvv l verse area without increasing th bull; ol' the reinforcing bar or addingto its trarrverse diameter, while the angle at which the shear members stand in the Concrete body renders them stili' as against lateral movement and rapahle of. addin-t;r to tht-v 4eompression resisting; strength of the beam. lt will further be noted that the body portion (i of the shear members being emlwdded in the Com-,rete is held tirinly'to the ander t'aee of the tension member, obi'iati the possibility ot :nuY displaeemenl of said partf.. lVhere it is desired to produce the lattirv etleet in the reinforcing struct uro, the lateral- (lang-res of the tension member are slitt-al on opposite sides so that the angle ot the slits in pairs will stand in opposite directions. as shown in Fig. lil. permitting the ima1=rporation ol' the shear members into the strut-ture in a manner to causo their vtree ein to Cross or lap, as clearly slmwn in Fig'. il, the ar rangnnnent being: sueh as to cause the shear members in eaeh. pair lo stand in opposite dirent ions.

lVlie/re it is desired to supply a eonorete bar or similar strueture with a tensileH strength greater than that a tlorded by the liar illustrated in lt`igrs. l to 5, such additional tensileslrength may be supplied employing the structure shown in Figs. 87 9, l0 and lib wherein two angle iron tension members T with diagonal slits S in the lat,M eral flanges 9 thereotl and n Central tension member l() located equidistant. between the central tension members 7, are bound to- ;,rether by the shear member whose body porw tion b is sullieiently long to span between the angle iron Vtension members I and which is provided with an eye l1 formed by slitling the body portion longitudinally at its rente and eux-ving the parts divided by said slits in opposite directions, as clearly shown in lig. l0, said eye so formed receiving the ventral tension member l0 whieh passes therethrough while the upwardly extending l than that of the late 1al 'llai'iges 2; at the lange having narrow slits therein, ajplurall of the ml anges of the tension ifnembers ity of relatively thin, Het shear members and pooting therefrom. l() crossing between the flanged tension mem- In testimony whereof, I sign this specibei's und lying against the under .faces there ication in the presence of two Witnesses.

of, the ends of said shear members being AVILA THGMS. bent upwardly at substantially ri lit angles Witnessest to the body portion thereof an said up- 1 0.13. BAENZIGER7' wai-elly bent end portions lying in the slits y G. HOWLETT.-

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