US894997A - Reinforced-concrete-construction member. - Google Patents

Description

No, 394,991. ,PATENTBD AUG. 4, 1908. 4 E R. ANDERSON. REINFORCED CONCRETE GONSTRUGTION MEMBER.

- 2 BHEET3-$HEBT 1- I INVENTOR.

ATTQRNEY.

Humane! r'ILED JULY 8; 19m.

WmvEssEs; I

- ,PATENTED AUG.'4.19Q8. on.

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DJULY8 NDERS TE cons .ATIOK FILE REINFORCED GONG APPLIC GTION MEMBER. 3

2 sums-sum 2.

' INVENTOR' ATTORNEY.

l i l 1 i 1 T all .QUILO m it ma y you cern Be. it'knosvn that I, ROBERT Axonnsosxs citizeinoflhe United States of America. and resident of, Cincinnati. county of Hamilton. 5 State of Ohio, have invented certainuiew and *usefulllmptoyements in Rcinforced-(oncrete Construction Members, of ivhich the follow- 7 in is a-specificatiom y invention relates .to the horizontal 10 members .of' reinforced concrete c mstruction suc'l'i'jas bean s', girdersflo'ors and walls. Itsobjec't isga meansoi reinforcing such 'co'nstmction members, inwhich no breaks occur in the renifor'cenient at points where there is jension end in \vlnchthe reinforcement distributed to .the' parts of theconstrucuon memherp rqpnrt ion. to the tension to which such parts are subject in use mm in which the reinforcing bars may he manufactured and satin n in the construction very readily.

This-0 je'ct- .is attained by the means describcdin the specificaiion {mil iilnstrsted in thenccmnpanymg drawings. in which. F igure. 1 .is n vicn' in side aeration of the reinforcinfig hars .in the position the occupy .intthe'construction.member. the dotted line indicating the outlines of the concretelof the construction. bar, and of the supports. the strnps being omitted in this. view. Fig. 2 is a View similar to Fig! but showing the tension liars surrounded with concrete, and the straps inpln'c-e, the concrete being shown in section.

' p ;Fig... 3{isle-sectional view upon an enlarged Fig. 2 .;F '55 i sn sectio'na -\"ie similar to Fig. buts I qtving four-.hars in place of two bars,- F1g.. 6,. s awdetail elevation upon'nn' cnlar ed scqleof the reinforcing hat-shown in 40 1 ,5, ...F ;ig,7i s a View similar to Fig. i but. of. a modified form-of construction. Fig. 8 is .a, plnn ien. of the tension r reinforcing bar shown'in Fig.7. Figs. 9 w. ll'an'd 12 are sectiongl' vie rsjupon an enlarged scale 145 taketihponlines, x -1', rr and r- -r 55 which-have an arch Q and strai ht ends.

V, 1 z v tier; taken t ion line z-2 of PATENT QFFICE;

.nnmoncnn coivcnnws-oons'rnncrmn mamma Specification 0 Letters Patent.

Application siedzrui s, 1901. senn n' 382,666.

V ROBERT nxpia-nsox, OF cikc-iim'rn onto; ism-0M0 'rniz mm-comm": f QONSTR'L'CTIOS CO}U?A}$Y. or CINCINNATI, OHIO, .iconroniriox or onio.

- Patientied Augl. '1'

c, c. The end, 0', extends'overthe 'ce'rit erf'of a support, in the lower part of thebe'ani; A, to a pointbeyond the c'entralpomt-be tween the support, B, and its adjacent silpport B'gtherwe the arch, C. extends at atii'go angle to a oint. c. to the left of thesu'p-f port, B-. hence the bsrr lies in a horizontal plane in the up er partof the beamftoii' point, upon t 1e 0 posite side of the st!" 6* port, B. Thence tie bar extends at t' ie .i same angle to the horizontal as tlie' opposit e' side of the arch' to the" straightpartyq and thence continues in the lower 'p art-'of"'t he" beam to la point near th'e'centcr of'the third"? support, B The second steel bar 'starts'fqb near the center of the second support; B'" lies adjacent to the first har."its.arcli' ex'-ftends over the "second support", B 'and its,

ends, c, extend to'& point above theftlrird support, Bfiin the manner described for'the-75 first bar. At'th'e ends ofthe beam. vi'zi, at the side walls ofthe buiiding..th'ere' a'rc short 1 steel bars, C',' whose semi-arches'teriniimte in hooked ends, c, above the su ports; B ffand whose straight ends, 6, exteii'ilinuhcfgo lower part of the beam and tei'ininnteiiuthe center of the supports, B 1}. respectifily i At points in the beams nlidwtiyhctvi'cntlie supports the usual-straps; D, "eXtend'up-.""

,wardly and have their endsidfd', 'bent'over 335 .into the concrete of the -lioor,' ,E At" the sides of the supports there -are similar" straps, D. In this construction'it issecnf 5 .that the greatestaniountsfof'metnl'lin.the'f' beafni occur at the points'where the tc'i'i'si'on'- o is greatest, v-iz in the -lo\yer'pirrts-l )f' the, beam midway between 't'hesup por ts'y that; i :ihove-the supports in the, upperpiirtfoftli heani the reinforcing bars nrc integral and are located in a pusitiun s'ucli ns'toiesist tli 5 reverse moment occurring" fithlo'i eft e-sij' 1 orts;, that the laps or breaks-nonsens mr zindits adjacent haioccur above 1 'fport in the lower part of the heann where the hcndiriginoment is nil." 'T ht'is'no breaks .ioo occur in the reinforcing biirsn'lier thereis a'bcndin ortension t'orce inlth'e beani'l ,It 'w'ou d-Ihave been'aitobvioits enpedinti to make the'part, q, ofthejfirst;b:ii'(f;6h i the left of Fig. l integral-with the pol ty; of 1' 5 the third bar, C, and to have'madc the par t,,; c; of the second bar int'egral'with'the part, c, of the bar, upon the-right. 'T his is a 'nliofilification that, might-"be used in fio'or s a s;

t v r Referring to Figs. 7-43; the supports.

, and B are similar to the supports, B-B. The arch (F. in a' steel bar occurs to one side of the center, and the straight end, is shorter than the straight 'end, 0. In placing-the bars in position they are alternately reversed. that is. t \'o bars are placed side by Siti. but one being in'reverse direction to the other. Thus, the

the-other as seen in Fig 7. I

two bats stand alongside each other, but at long end. c.-,"of one occurs adjacent to the short end, c, .of the other, and the arch, c,v

of. one extends beyond theend of the arch of a point midway between the supports, the arts, c, stand over the parts. 0'', as shown 111 Fig. 10., while at the ends they. diverge as shown in F ig. 11. These pairs of bars are arranged as the. single hex-are shown arranged in Fig. 1, viz, the first pair starts in" ,the lower part of'the beam over-'support, BF, their arches'stand o'ver B, and their ends extend oversupport. '13, while the second pair start over support, B. their arches stand over support, B. and they end over support, 13*. The result-is'that directly above the support, B, where the reverse moment is the greatest. there t'vi'll he 'the greater amount of metal and that toyt-he left and to the right of the part of the beam occurring above the wp pozt, there will be a decreasing amount of metal in proportion to the decrease inthe tension moment.

, At the ends of the beams shown in Fig. 7

and Fig. 8' there are two short bars withtheflseini-arches, C, arranged similarly to the shortbars at the ends of the beams shotvn in Fig. 1;

= 1n the modifications shown in rigs-p13.

it is seen that the laps or breaks occur 'always in the lower part of the beam above the.sup ort where there is no tensional stress; tat the metal isdistributed inthe difierent' partsof the beam in proportion tothe ,amountfot tensionjn those parts:-

a that}; these modificatiom but one form of bar.is necessary to be manufactured and that the process-of setting the parts in positionisasimpleone m In the modification shownin Fig. 5 the series of bars are placed side by side similarly' to that shown in Figslz? and 8 with the i I. A reinforced exception that the arches C, occur in the center, oftthebars of to one side thereof. a

' What I claim is: t Construction l'member for extending over-aseries. of sup I'ports -consisting ofconcrete in" which. are

embed The arches of the ded series-oi bars, each of theZbars.

.concrete of the memberQ-Ihe support in the .upper of which-arearched-so as to extend over a art ofthe concrete and .having upon eac side of an arch straight members to extend over the two. adjacent supports in the lowerart of the tits being arranged so that the arc-hes in one series as over every other support and the arches 1n the adjacent series pass over those su ports over which the arches in the first o not pas. p v

-'2. A reinforced, concrete construction member for extending over a second support to a third support and having reinforcing bars. each bar being bent into an arch intermediate itsstraight: ends. said arch extending overlthe second support in the up er part of theconstruction memberan'd tiie-ends of the bar being located in the lower art of .the construction member andem ing above the first! and third supports respecv 3, A reinforced; -concrete construction memberfor. extending rom one support over a'second-support to a third support and having a series of reinforcing bars, each bar being bent into.an archand having straight ends, said arches-extending over the second support in the upper part of the construction member and the ends of .the. bars being io'cat'ed in the lower part of the member and extending to the first and third -supports respectively; ,the arch in one bar.

extending -more beyond the right of the center of-thesecond support than upon the left thereof and the arch in an adjacent bar extending more t'o-the-left of the center of said. second support than upon' the right thereoff 4. A reinforced concrete construction ritemberlfor extending over'aseries vof supports having a 'series of bars made similar .in shape, each bar having an arch and straight ends; one. of said .ends being longer than the other, the bars being'placed side by'side in the'construcrion member with the arches occurring over the-s'u ports areal thebars being placed side by sit e in alternately reversed directions so that the are?! lin

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