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II 1 . f‘ 1 . ‘I I I ' . o v I ..I h t I I ‘ I I ' . . _ I I ' _ . L . ,2 - - . ' u . - - . ' o - ‘ . r~ ' I I ' .. . g .- - - . . 0 I. ... L "| J . I . . ' .. - : V I I . . — ‘ - . a! ' 'l v < . . l I“. ' - . f u I I I I . .- I - . l I. «' ‘ X I '1. l . ' . . v I t r I I V . I . , A '. . - I ' , -' . . ' " ' i . c ‘ I H '. . . .I D - u o 5 . I . . I U , -' ‘ ' I I D I . . . . ' w ’ u 'l u ‘ “ l. . O l .4 . . . I I ~ 0 ' I . . I I ' - 6 U .I z ' ‘I _. ‘.I . . I ' I ’ ‘ I '<.. i i ‘ THESIS ; i 4‘." _ SUPPLEMENTAW " ‘ 1 A MATERiAL m BACK OF BOOK ‘ I _. . PLACE IN RETURN BOX to remove this checkout from your record. TO AVOID FINES return on or before date due. DATEDUE DAIEDUE DATEDUE REMOTE STORAGE Pig . _ .3 I MAR012017 . < ,1 ~‘ 4,, r \ . ._.I__ u,.._‘ A 20" Blue 10/13 prClRC,’DateDueForms-2013rndd pg 5 v s. gu¢J.. Jan—cn’ . a- '1. -- .. .4... _...._.__.__.. ~.. .L .4 ._.'-'..._.-. {Fl'hl kitirrr r I Ilhtlu “an. an. §a\ A! un gnalysis of a Baltimore Truss Bridge A thesis Lubiitted to The Eaculty of MICEIQQ‘I STATE COLLEGES of '1""T'"“ " ;."7"' Ar T: A _ ”“1 ' '-~.~r_- 'Tfi‘rT‘ firm ~-fr',*’1 '1 “UL{J.J\J.LJ.LV¢L:J ¢qu nfirglfiu Uvmiibh by ‘ Q/ \ “Ugh". \/ ‘v In." . I, l r \ " "N J .'- L at A" o “.93Richmond Candidate for the Degree of bachelor of science THESIS in unprecietion sincere aggrecietion is ex,ressed for the kind assistance extended by “r. George L. roster, Jr. in. J. Beungres; Reg- istered Civil fingineers of Lansing Qichigen; gr. um. Voight, of the nich'gan State fiighwey Department; and Jr. Kenneth Queens of the Engineering leculty of the richigen State Col- lege. The timely advice, information and other assistance extend- ed by these gen has been of very ;reet assistance in 1"e gregeretion of this paper. B1 of 19-7-21 (General Views of Bridge) _4 K ) I I I 7 I I P I i E i r i E I i I-iJ an Analysis o A settinore Truss :ridge g In times of e: ce, as V.ell as in tine oi tar, he g e of re lacing cartel 1 ligk.sy 3r d; s rises .ften, either beca se of the fact that i: cre sed traffic conditions have rendeied the bridge inca able of meeting traffic requireaents, or beesuse tie bride e fails to meet ,resent strength reguire- ments eitlei due to deterioration of the various members of the structure, or to increzsed leading conditions. In peace tines, the USdsl solutiin to this pr:blem, then traf— fic conditions warrant it, is for the res cnsible authorities to engage Contractors and Engineers to replace the old struc- ture tith a new one. homever, in war tirme due to critical shortages of both mat- \i erials and hanpoxer, the replacing of bridges becomes, in nest p cas s, i1_ossible and the only other solution «0 the problem / of "HSUlllClent briQ as is to strengthen the existirig struct- L ures as economically as possible, while being certain that i they are either sufficiently strengtlened to carry any load ' tliat miglt be placed on them or else posting load lihits on > the structures that will prevent any overloading that night 1; prove disastrous to the existing structure. ,‘. The project undertaken in this t: as is is the inséection and analysis of such a stiqcture to deternine.hethe1 or not the orido.e is su11-c 'ent to 1-eet existing re~uirenents lhe b1“ idge ins acted and analyzed is a single spa , hirn truss of th altimore type, crossing the Grand River in Eagle Town- ship, 8Clinton County, ‘i01igan; between Sec. 29 and a mo 30. The hichioan State Liehwav Departrnent's File Sumter for this bridge is El of 19- -7-21, the nlmbers referring to the struct— ure, County, Tovnslip and Road numbers as establisled by the fiichigan state highway Departnent. Incluced in the gaper is a diagram of the truss, slowing the size and makeup of the various Members and the lettering key used for these menbers and connections as referred to in the summary of stresses, a co;y of which is also included in this naper. The trusses are primarily of seven panels, each of (3019" ) thirty feet and nine inches in length and a total overall length of (215'-3" ) two hundred fifteen feet and three inches. These panels are each subdivided into panels of (15'-4%" ) fifteen feet four and one-half inches in length, each t’th intermediate hangers and floor beams correSfiunding in size to the floor beams and hangars of the primary panels. The structure was built in 1909 according to the attached plate. The floor consists of three inch oak plank eight to twelve inches in width, laid transversely. There are runner strips (2) of two inch plank laid longitudinally for one way traffic. The floor is supported by eight— s'x itch I beam stringers at approninately twenty three inch spacing. The floor beams are fifteen inch Standard 42.9; I beams suspended from the pin connections of the trusses by one inch square U hangars. The abutments are of stone masonry in fair condition. At the time of this inspection there was no a,parent need or substructure repair except to point up the malls with nor- tar. In analyzing this structure for its safe carrying capacity, we have followed the usual practice cf using working stresses fifty per cent in excess of ordinary design stresses as rep- resenting more definitely the ultimate allowable loading which should be permitted. he have assumed a depreciation of the truss members and floor beams of five per cent, and ten yer cent for the stringers and timber floor. Tne timber floor, while in fair condition at the time of this insaection,is sub— ject to much more rapid deterioration than the steel. nlso, the steel stringers showed slightly more deterioration at cer- tain partially hidden points than other members of the struc- ture. We have used the legal loading as now permitted by the statutes of Lichigan in making this analysis, except in some cases where it seemed advisable to use an h-l5 loading to be definitely on the safe side. .3 F/oar Ana/yaw M’m and/yam of fho exIJf/ng floor. we find find f'hc exuf- 4977‘ bond/I7 Mame/72" due In five load/r77 wed In 2%: a»- a/y'u'a and haw f/na’ ffie al/awab/a bend/n mar-nan} Mia” f/Ie f/oor Will Jfana’. Final/9, we defer/rune WW Mf'l'e'nahn7 Floor [.1 adezuaie by camper/n9 Me fwo fbfifidlny mamafli‘a. ,— II_ IV 4' " Turf? / “" I’ u u n In, ’0‘ l3“ N Fig. I Assumln Me 57/7:ij laaa’ *0 be urn/arm It, dish/baled over flu Mme 2x 4 runners, fhe load would be app/[odes Jboflrfl- w; fly. I. 77). Max/mum ear/51‘1"? bonding mamern‘ la :- 33, 800.” {700 x 6.5;: 1.3: /o)- (700 “.53: /.3x if) =3a,eoo"" ”916655”: Mot/m am a/la web/c bend/n mar-nan} for Me floor plants 1.! dolermmeo’ by 1'47: 7’ rmu/q— Mom. of Inn/IQ X fi/Iomb/p (/01), J’s/res Mal-nan} - it Thickness of P/a-l-e (ac) The floor 1.: compound of 332/0" Tronayam'a Plant: arm/ 2' lonyiloa’lno/ waivers. # fl . 04/02 on a//awab/e und’ .5708.” of IZOO /" far ffiese £16m and ad mama»! of ”uni/a 0/ (a.a=(‘z5-/o%) ana’ a. g- £3",far Me 3" Planks, #78 aflowab/a bend/07 Ina/non} Ail-‘4 57.:- , IS 0“ Ms?— .M=44500 ° lo! Jun-c ‘5. allowable fafa/ meme/77‘ far fhe floor 1.5 - 46,500 ‘ and f/Ierc I: no dead loo! fuaz‘lnq on Me flow; Me foz‘u/ en: 2’70 "pat/mum meme» 1.: f/u- /IY¢' looo’ mamcn} of 39,60 " which a/mws H76 floor M be safe a: r} a, a/lbou h 1" WII/ [orabab/ wear fa an unsafe “d 41473» 53% O f-he oMcr mem on! «If f/la Jt‘rac/Ore 0/0. I 1‘. '-i)_ll .5 fringer Ana/y: 1.5 In fhc ana .31.: of ”we .n‘rm or; we defer/nine #7. dead load Momrn‘ curl-In, due *0 fhe waxy hf Of #66 Floor 000' flu air/”70):: fhcmac/ 0.3, and flier: defer/rune Me fm‘a/ a! owab/e _moman7‘ ink/n Info cans/dorahan the as- J Vdcprocvaf/afl of fhe memberé). .Subh'achny f'ha E. uzghsnk \eo\\ kuxs svfi ‘bru’t *mfi 5w .xoo\\ Qnfiuxs OAK \o ung\un§ 9‘“ {\\ -\\Q s<\'\ n\ bszA) Q“\bb°k at“ cr\ sub *nsmom “\bfi‘bd Qt“ \uemom “\‘oned s\6uwc\\u B‘V‘t bnx" “VA ‘bvzxv L\¢.‘\§ Nadir-4%“ sn\m\a\s‘b 'aw .Q\\c<\\'\ .‘onc~\t. \\\w Nag-AN s‘\\ AMA“ ow‘fi an“ onwvogfioo \ws e‘mugsbc u use“ Qnfiuxs IN: .zfikmsmom §“\\(\s¢ 1 J~Gss€i ‘1. “ t.\ _:e__._r;-l l“ JH IX .e\'\ ——L {5 ‘1‘? ‘os\\>A\-\\z.\b \>\ mxo‘un» 9A o-‘x ‘ooo\ \s‘fafivsa Sfi'\ ‘nsmuznk aube\\<\<\u 9d ‘o\uow ‘obo\ sfifi .Lxemnxn Q» X 3. sweet §\\‘\ wove .1 «pix (\\ “WQAL m“.008 ‘8 E. = t.\ \“smom Q“\\)h§¢ Qhficua mumusm fifi“ flu 0033:, = K? x E..\ x23 1 00V\ -\0\ xE..\ x13 x 00‘\ at“ xoR \“amom “Cons-.6. :\A9wo\\m mumwusm $\\‘\ 319A ~p\um~so\ 56* VA ‘oanxmxshub u L&“u\o\ abo\\ u§1\'7. \\“\\ §\&w\!o\\% X 9\\“h\ \c .moM - \nsmem (3:3 s*c\§ ‘0 Lzsn‘imrn' vi- “3 \ouu Licsa\\ btxaxuxwx" “Q\ 13?. 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NOQVN 3M “(0 *A g\sw 96* a": sub an‘tuxs *nwom bub\ \wkc‘t at“ emwnx-J‘tsb “sfi'k ‘oaa 6.9 \eu-«§‘\'\ L‘QQ“\'\‘\B sdfi —a9 av“ “u\\m\%‘o\zvxoa 03cm gmimfi \nemom §\Abwo\\§ $A‘\ RhVCOb‘V’rdUL .(cxadmsm 56* No ho\'\‘\3.\o\§b bomut. ‘ | facade/00d momenf from f'he allowable fo-fa/ mama/n4, M efahbe momern‘ allowable due *0 live 1040’ p/a-s Impo'c‘f. ‘fien, owing an H‘IJ 1000’”? J .s cm. which y 2‘ Isle: q 5019f tandn‘lon fhan Leaa/ Load/n would In {his 00 e, We def- ermzne Hwe mama»! due *0 live load/alas Impao/ Which {haul}: from #11: ”'75 load/n , and 51,769 f'his exceeds the allowed/e minen/ due fa live I? 000’ ,0/05 Impac/ We have 40 I’m/7‘ fhe or/e /0aa’ a/bwab/e 7’29 a [add/I7 proporflon 0/ fire ”/5 car/e /aaa/ a oa/ fa file o//arvab /e //y /aaa/,O/a.s ImFa Marne-"1‘ div a’ea’by Me H45 Mam-”‘7. The air/agar; are 6'! 0 /£.5’¢ 72¢ Jf’rlnqer camput‘az‘lons dre- eu“ Orly/ha / Ne! 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' ‘ V -1 3.3; a G) \\-\x v\1‘¢.5~.= \o¢\\ *§ N = 931‘; {\x‘snusMfi 8 xx “\Xwe.g\\ = \ §\§ ' - r.‘ \ g7; =\-usm“\\m¥ \O‘Q ~ \ ..~ \_ 3.!“ .S____.. ‘ QQ‘E.5\ a: 561K \‘E RAKE? -_ .2: \3§o\e¢\\ z.\>\o\\>bo\ sV\l 0* 9x)“: \uamm $\$hwa\\§ 3“ d) a '- ““QQE.§‘1\- 30$. 3 \" 6.8\\ - 7-. .‘\ 1 2. ‘ V ,- IV’K «3 mo&\- .N\\\oa.m \nsm‘mxahw' Lu‘sQWX Q‘fl-Xc‘fi,‘ ‘ l: \ L 32A)“ (‘6‘ 2.\ § “\L\\ "' 5\ en\buo.k v-‘jil-o pkg“ mm .'B‘ . 4309.3.» SPJ \\ _ rant “' ‘- EEEEEE ‘ 2.2-. " 5‘ x E" x a ‘ ‘09054‘ M A’t n. ,0 I .. " z.’ ./ / .dl a'- F .5. (SInClAm W} 7.:- a meat/mum when He laddflurdn‘ fie ' ceflf‘er off/re been?) fh/J mef'hoo' 7/V6.‘ 0 prer 60era /f/ab...: than: five Aeya/ [mad/277 and 1/ JO‘ma/ZJJ/I/Mék 2‘19 044 H-IS In Mu case. 3m #90 an”, In en-v’ I: 69 {Ag dbmblc {he allowable ax/e 10:4/ 27:23} be ”2.379;, ’ #132945 .z4ooa= /0 400 3“7/41"? - ’3 F/aar Beam fine/ya 1.: 277a f/aar bean): are analyzed In a manner slaw/0r in #707‘ fol/awed In aha/yz/na 7%.: a wager: j ,, .77 ; 7 fix»: an F/m beams are 1.5".1'a42 9* c= Ti -. i“ ‘ al7lna/ ”61‘ 1" 4441.8, ._.;I. 3'“ , .qunmuahanUVH ’24.]: ‘3 cf fiver/ab/e Nev‘ I 3 1H7 '7“ 4"“ 27,:cflllawob/e Unfi‘ Shes: ' 24,000 #/a Mrs: ' - and «Laue/T F/aar Beam ' 2/. .5 ,, ”007*53‘7/076’7’5 iii-2‘5 37: 3‘72 .flO f . Ava/l d /e 75:41/ N61" Weigh; '1/I3 1‘5 x, .. ya“. WM ataaa/ Mamen/ 4' $3.5. M“ 4’3 5" g" "" = #73, 000“ LI-VB (TM- [4000 6. -. ~ [4000”. Hi 11‘ 60' f 4 7. 33' . ' i ._.? /267 . ”My” flam- 51040" In defermIn/n fhe max/mum meme»)! due A: [It]: - laaa’ on Me bar beam, we make (/66 0/ Ike Mearem fir a'éza/u/e Mat/mam Bena’ any}, Mama»?! In a beam. .5 as, 039 flea/n he load a}: own In 1‘17. E, Me. IQ/aa £266: #7510000”? .5 a7’embe1»7 d‘twdaoazd la /a Ma awhee/ Laaa’: of I), 000 “5"“ if“ eaaea/r-xaa/l a: ahawn, we have file War: as.” car- Mana‘15r e Jbena’ln Mamea/ In a beam. 75¢ ,0an Mzae n7 meme-”£5 are ahawn fol/owln;:m #2 in: sm7 ”five mat/mam 0/70 fr'J’.‘ E a\\*\ \v m ‘sos\ 5M maxim Nut-“\Xmm v: u *msmom sW—k 53nd) ‘~\buoo \b\9t. m 7‘.b\l\? bofinsm L\\"\'\ Lmvad. adfi‘to \b‘Rnu‘a a\$§\\\\b\$\gma~an \\ \mo Qcfi‘o “OX \9Q3X {snob “wkfi “09“ bus: UAR e“ EV“ at.» on 5% k'.’3\$.bv~ue\\§ 5A3: 5‘033 L\ \ruamom thv‘xuxa $§\'\ absurd —— ck \3: \mx\ 96 *Lum \no\ flab s\dmw§\\§ ”\‘RVQ‘ QQ¥\Q\ = 0009.3 3 Mavié: \ U LQ\§C\9\ M§=a E \m\'\ u\ \m\\mxc \bmmmm D n\ be; \‘mxm axe (Need \oo\\ sw\'\ -L‘\%Q\\\'\*c be“: ?““V\°““ c“ \oswa\\o\ \Dfifi “ 't a $7? =3 €.S§- QX EA mu amend woe\‘\ a?“ YY':5.\\\\}- = T. *2)“ \unVQWQ \JLS - == ORE. moetuxaow qu V .. \— .Y W‘ ' I. *9“ u\6&\ \bV R v “\fi. * 00°33. ' seen-NE. \n\) s\duw o\\R a. 2. .\ S. "‘ mesa \oo\\ 0.:PE‘. =f62u £33? L‘xsguvfit. *VQQR a; a u \uVR a. $\\\ ' *Afisw "is“ \wXR £4va -'- \«3 we?“ \fiO-X. ‘bw‘bQ .9?ng @V\ = §\1JE:'V;K “an? =MAQ a...» y m M... 3'\ O'\ 4 ‘2‘: X r L: ; ‘Q3 1 g ‘ x V e X\ S WW 0833 meta ‘0»qu —- :N\\ ck em‘b \uamom mumwmm at“ nxnwwnksb vx\ Nbxosk‘x 5N: \5 5m: '5‘me a“ awnafi VQ§\ MVN no 5903. .mbad a fix vuamoM “05696 mot-«swam Qiu\0b$b ‘6‘ :>\\\ .m.Q{-\ CM nwufit. LB t\o9°\ 3&'\ cu 5u\o\ \sd \Lufi‘ gesx9¢ max“. I. §R\\§§o5~1\‘\\ %‘\‘\ \Q §o\ 2.\1.§‘¥Q)QQ\“S Bb§$x\ovw\\\ tag QQQ 5...\ \o l‘bfib-X \ssfiw QW‘\ o\t\\ ‘os‘owxb -vusb s\ \zusC\ anew ka bvsfi 9w “\WQAB Us \\93\~\\t\baae oox\ 9£¥§ .mwsc‘; m ck\ \tssmom ?t\\\>“‘$ '5 \& “O\\\b skk K\‘~\\W6\\~o\ uwe&n tub stvamem (\\\>c\b¢ o\6.\u.§<\ Numwum 8““ gaunt \cxfi 6 if . u .r/ LAM. =37?“ x-ZJB XI“! 3/4 = 4/34, 000' (mu) # I n a, LLJYI, -_12000 x .5153 1/.3 1/: =5 070,000 r*’v..r~,._-c-,-.- ~ ’ .. ' ’f’J ’0 7774’: 'fllemeé/e Meme/771 far Ml: F/aor be?“ 41" .1/ q. 8.M.=£2= 4/7. 7324000 = /3‘/2000”‘b .1 ' "('4 c 775 ' I ' 'l " ' l n 5 7710.5" wfibe wb’owab/e am. (43440” ‘ ) Mun/s We aém/ loaa’ am. (/9gaao)= 4/4.; 000 Awawab/ (of A141. 777cm: flare, Me ens/”77 8.00. o-f {/365000” " 15 Jak. . L7 3,1. 'M .M Axle/yaw of 7712.5.) Membens ”7 i awe/yaw of ’97:: 9‘70.” members. we find {I 301’ {he dear ~ laae’ afredee: due 729 Me rye/7177‘ of Member fhemoe/ves, f/te Floor beams, sir/r793 r: en f/ r, lye-ti, We find f/Ie e/meeee due *0 // re /a 00’ ym/oac , {as ”7/ file /e7e/ /ee J/fl7 ro/ae: e: J/lpU/b /e b fie ert‘ Ks of MIG/9x7 an If #1.: fave), I?! mean: of I f/uenee law: 0/74 I‘lfle/fiy; we find Me 15/ e/lzp/eé e J/reases and 7»: -q//ow 6 [rue lead la: payee} messes in defermzne ”’4:er or 40% we ma: ”Ir/00.“: [400’ resin: from: on file Jfrue'fi/re or J/renyfiéen 12‘ 4-1.2 I 05d .4 eed Jr‘reeJ e; : fir fie Ioee’ of one pene/ an fhe In #eVMea'Ie/e lie»?- erJ‘wah ea M1,) We have-- . . .. , 4' fiber - “-9": /5-9{.: 3 , x 60,, - 3‘90”, Mnen— 4v"r/.s'5-?f X 4 Knéo - 7‘IO# n‘rm ma- ear/2.5 5/519: = 1537 f/oer beam - 92.9 x /7-:" = 753 57.25: 3%‘27’e A 2 Odom chard] 91/9} at,“ )X{5:37 3 646, 2- 3"” /J£or7 56 9 42 75/a/= 4580 779. load on each of {he mam Pane [fa/”A 1.5 defermmad AZ finding )9): fafa/ load on one fry J and 006 fmcr‘zn 1‘ am If fhe In/e fMld/ai‘e hanger load/.5 ane’ a’l wa’xny by fie num ber of ma”; ,odne/ pal/77‘s. Me CUM/90257190»: (Jaed 1/7 defer/”Int”? file we/yhf afar): 7712.”, file mam peae/ load: and 7%: dead /000' .5 *resse are allow” an fbe fil/avwng payes. fhe merfiad of oz» one/yea as “red 2‘» a’e/ermxne fhe deea’ load .5} 5.535 3 ‘\\ 'u . * hum} coo l\>-£\\\ = a\x EA: {CR 1 03?? = .N\..\.\ *“ “ \ .3.- OQQKOQBQ“ 5.“ {At £81 1 OOQSA .. PAUL). ‘L\ mwbé \QD\:‘\ L\K‘\\ \6\ \“SV‘NDW b\6mw§\\u $V\‘ ““ogmg\;£\ Mgmvgfi SW = :3: zmg \ \ 1X '3 a “ \bcekb 3M tutu?“ K A OQQ‘S‘Q‘LL\\ .K‘A,B 5\v$mwc>\\m 5W Lufi‘ .XA‘AA “A :\<:\qu\\‘?\ use g.\>\\\ q: \ohugkw .N\.6 \am\ 33:91. L\‘°“‘DQB§9§\§ N—o .Mh §u\\uxs a?“ \tha- bxsfiV L‘sésm'aw LLQ‘R \u {\L‘\b§\§\ 3t\\\u\\ \bfi\\ aw .Lxsclwsv“ LL\)\'\ 5?“ 3‘6 L\L\3\ux\u '~M\\ (\\ \sAm'bN 3 \§ *VKQ\BW 25$". 0“ sub L:LL5~«\I. Bm§3\ \awsb z‘svo‘k x0 \R Nu Laggvxw z. kLM§b¢ woe\‘\ av‘xk {gbxmaemsfik \c:\z,\>\ g wage“ * \aoc\ :\u\ 0* sub L‘BLLB‘Q\1. 3N: \>t\\\ a“ 29x \u’fi. 5% d u\ m\\>o\\\1. LE Leek cm mex uqk \§§5\ 5N: L§C\\\ sanau\\ \ \Q uwsm 3% \%)m\\ UN“ \5 “Q \€\::.\W\o W§ ebzztrfiz. S §\\QQ\\§ \6\ 3x \BNV Enx‘x 2AA \\A\\§¢\<~\ bm§ mxmx‘b’xab ck £92.23“ I. \oagwm EQ\\‘\DQ\ :3va b\€$‘uwc>\\<;. tsfiX 9*“: Nb Lu§x5<3u\u>\ \um\ 52.9 «xx an“ aw \u\\ \5 ‘b(\‘\23$w :\\ n%fi%§mm\n \Q :xxkncrth. '. LB LLsx‘RI. Em A Ewan ~§m\\ b\§\\~.aN\\-_s¥:“\ :v\-\ “a \uuu awn \o \>t:c\ .560; xék --a\19v\ 9w KAN u: A:\>L\ lfifi N; w; M «l . .. . ‘QQNE - ‘53 x ‘ t, ‘_‘\>-2.\ 1 9~a\ - «0&\ *0“? = QAHR S 1‘ i?3l\1"u'§ ~usnfi¢ VEE\ "" LSV‘”?.\‘1 ”C.S.\BB ‘13-: “\V‘rt 31‘ = “%"'K\ x 9.3» - m§a¢ V§o\\ *Sé‘t’fi =15?B S ‘gp; g '\<;2.\‘1\ ‘3‘\x ‘1?\1\\ \aonu moxfioé ‘32 vukt\ K“ Six-S 0%?» =\ts\6\ \DO‘\R\\'D‘\$‘6 m L\n\° \suu “\um 5N: No $339 so ‘b'ub\ ad“ «fim‘ktwh but: Ll\Y\‘\ emu “§ ‘am0\ \tfib'\ s<\\ anbnxk A Q6 Vm‘c\i\\> \awa L‘bucA 15§nbex 5%axbsMNb\t\\ an?! 'R\ ma R .unqu \stxmq “\um \o \bd mxm at“ amok \figxbw ev‘xfi §P\\V\\V£\\E>:\Sb \\\ beau cue-Sfiuqmw) 35‘ nzm¥z \Boo\ \DBSD 25% \nxu $395; \bwbcx awn-xx 2n“: \LLQ‘C‘ “\0 \Q “fitm 391‘ .LBQQR Qn\wn\\®‘ ‘MV‘R no nwofit. 3-“ zaut‘mkz. buo\ \uer :A-\ =Q\\m\5\s\o Q‘\ ban.» t.\ L\L\l\.c\§ 7 war"; were? 3% - " 4‘ ' L'quggorzsa’fi" -— i 0 ~ . . a u f " Floor“ l6-0 J (13734 3 1150 -= 5/, 600 y EmmerJ-‘qa 5 _215 73'! 2.: :60 (M, ”.3 ~,. JAMIJO y Jfrifmgen- 817111.122/5'3" ’ II, 5'00 ; Floor MMJ'M‘VZ. 7 I II! Hz J 7 1 1/ «a, ap y .~ * ___M ' ,: .... raga-vans"; 7' [Cl I'm/J: )7? z a ; a c 07‘ 'I!' 114240 1/60 ' ",0 " . F t: It'L' 320') 2‘0 9; 600 M. 1., 44%?) I 15-0 / 15 m. L... 4(5."" effigy-6 :7: U; L; ‘f(/ e) [fa-o 4/0 0.11. 4(9h% 1:43-0 I640 0: M: /o( 6.]. x 15-0) 7/5’ M3443 10(3an/5-0 £65 M; 09 z (/a"u x 2/;6) ”0 ”9 AV ‘1 (19"[0/6 12,300 I 7420 (AM: ‘I( ‘lx 916‘) x 21—5," “0 f '1?ch «IV/‘33 x 21,36“ ,_ ,. 500 ‘ LrMe z 993 x 21-36‘; - 90 Mr 0‘ 2, kn") x 31-6 //0 a. a 9 a [cg/.5“: x30, .. I 350 (Jo/917i ”by; 1m: Inflhzkc 990 Ain’t-mace 4“ '4: '):§~&I*6” L25 4.4 s 16: flux; 3 Magi}, .2an 49 1.: /6 1195x9/19 1: I579; .. z [/0 4‘ 41 a': 4m: ’fib 4: I5~9h / 300 , - z9aas": 30.0 ‘V : Mace/knee“: l5 % 4:00,} ' Wf. / 77-05: 34900 ‘ ’/2. Floor 47 700 . 51M: 6‘- 3, Load 01' one 754/55 - 82,2.00' Inf. W/ééoad‘ 9.56 k/p: _ .719”; z I ?flene/§ ,1. u I: 9/.432. Kaps, 73:95.: Loea’ 4' 82.; It. - 4/.17. g :3 40.?8K fir mam Panel Palm‘s H ‘ ‘- 40.96“? 5= 3-3 Kip-S each Mam Panel. Luv“ emQ \0 Mi \sw \mficfi hoo\% \o “‘3 3% ’R u . us ‘ sea NC = mauve, x £72“. 3 o—3\ - \QQVK O‘CAKEA 6.3%. TS. l‘EjEAS. t o-§-u2mc\u3 QUE AS "E‘EAS. 1. ISA x3 ~u'5g3mv'r2. QB M? 8A! BX\ X V 5» “LNG-2.3 \uo“ \Uésv = m A ( ccu‘xT \\ 00% \x 0'93. Kg ~§§I %\ = bxofi: (\6‘ 005 t? 095. \‘sts rams. = u - “u \ 0-1\ I (“AWN \.\ \N\ 1V1 &-\5.N‘<.§‘b\‘13\x .x—\ \N\ °\\’ 0-05.} K?“ \3 \3 ‘L s\) Qv§\ D—EPK\&\E'§V)P N :9 1W Ko—“an x \.3 3 0\ gm g\) 1583 “3‘23 1 D“\>\§‘, 0\ £2: t\‘¢\ b\\ (é‘\3\ I “"e.\‘\ s. \M an OS? \ o—os‘h‘a\93“0\) \e v; w 0&3 “@"iS K Cake 11'? 3‘? 2M ~o\) (ms "sq; x $330)» ..x—zm 09 “"éfls K “3‘? 5. 1M 2 .5 mx 3-\S x @335“ 5. 3% WA 052'. \ “ .oit fz.\§gx e,» v a). m owe §j\$x(\*\§:f s)\\ ‘ath 3 Wk .\5 as: “a—xsgkn ex)» ‘aszK‘bxmék m3s .. "}\3-1\ x 964%? “A .- .5.5. on: Mé‘ej-EAxekQ-xfivt A\ 2.3 v) 00E. \ 4\‘\**Z\ x ax“ Xs‘W' 1'6 (.5 §; Fromm s“ 233?: ‘002» a? 2A cuuswwMamAM 002v; can“ \ KW ’ 00‘ K‘é VOQVR s\‘ “NSKS‘B = In)“ :no \0 \uqu Lo¢3~ 32.}? = \cwbS \bmmg .\v\ (NanoA? 1 .qul 553% = .3 :58 = ‘0qu Lax)“ ILW - zknxog \sugo\ «Mam go} Hafiov 7:. (”Mum \\t>u: zed 5.8 =2, -Z-— 59.9“ Xauuq «9 .0 DEAD'AOA".D.§17‘€“£S§E§“ ' .371 /. 9.32. - 52.9 Lo , 3}" tot! = .321 9...... .- 31-.- 316’ * 41.21 i r .. _____M___MMMM.._.:.3 7.195,; INJ'.‘ -qOJJJ .$h_ M .. l3i95Z‘Q M- - ;a.? c , . ..-'..._ - . ._M .’ ’9 a f .’ z- - . ..-': , ..-:--r ,v «p; ”3.4% 15.71 ’(fl‘f32. " 49. 7 y a“ n ' y- a , - 5‘ .~ E A {’5' y '\ 3%?LLA055 = 3525' 3 397/ . 37. «w y ..- 2.3: -:351r$7 ; \o.‘ 838 639K L QROA C3 NW: .A N I \‘lf; i Q“ ?- 31 = “ y .55.? .\ K Kt. -.S’LLJ o_\ VXE, = 1&0 .\ I \E. ‘\\ 4—§'§&____-y:p I \C‘ E; 9 5“? E, = \ .83.: \jfi >\\<\‘r’i 7&3 y \\ -313“ V $9 = 329 .\ x mm, 27 M y {W “‘x‘je i'w m 122, = 153.\ x \R .vi ‘ 8t» s_\ (5‘? SE ELEM-5 ‘ 21.2.2 = J P“! f 1‘ ' , ‘ ‘- b - ' b..- |'){- - f “5/ (of p 7"" / ('31’L6.3jt" 0600/ 2.0007 '5 1H1: 5.533 (mm: “a... I‘d-y...“ u-A--a,__ a ‘ " .- 4-53 3%7/ ./ deg}, lla’qkb ’0 ”BE ‘ 3 g y :5???”- z 7.25..“ «z 942i; .3 95‘. w ’355 1* Mug 4. 79 "‘J .-r' a. . '~ ‘0 , .‘ / ' . 2" zzav . LL51.:%~- . '30.]: A- -' - 9-55 .. j ‘51:: /:. . .1; 5' x - my? 315519.431 .5 3'63“ r . w 2.91.53: A 02.5: ch . ___ _‘ _ § I i _—‘ L "" 'F_-.‘ r v' v 1 2.52.2. 39:2. bug). bwbfi kfiN “5'33 6:.» ‘3 # 9x2. V.v._,_ 8.2 .\’ \VVE. ‘EA ‘8ng V RE."- SEPA x‘r‘BSS 3.BS~‘ 136A R‘PBSS N 2.23%: 3‘ 85 * \.\>% V8 XS ?S.S "' {A .oz6 82.? - 22 .15 P.3'E. = sum x2113. 9.3; .2395 1.1.1.13 IO Dead 4044 Jf/esaes (cm/'07) 2708‘, 2.2.? 30.!3 _‘I,_~§.'§_ 15.5.s’xA432: - 36.? £5.55'XA025' =2‘,q £5.55 8.2 0 I7. 35' 4 J’%7 Hvsgz" : 72/? ’7. 3: ., .. 2.27 ISOO K A431 3 2/.5’5’ z. _ h A / ._ . ,9; ‘. . z. , . \ 666/0 [JV/‘1 79.57 2. 35' 72/? 45:06 2-27 Izss' v.55 12.77! /.432 a «3.2.9 /£.77t /.02.5'= /3. ca Q\ \‘ESS P5 .5. E\ .02, 5:.» V-WE' " 599312.221 P.§S=ZSQ.\¥}'L.ZS 21.1.5 0 3.3 It. .‘\ ZES\ 95.5. “yaks a 5:93 I aorcA v9.z\ =250.\ 1 $5 2.\ 0\.\‘% YY.‘¢,\ V1.?< 2‘5 .S V\S< «902A PS-S 28-<\ 82.3} ‘ 8$\%\ =$E\)\\“<\S\ $0 .‘E\ =ZSQ.\ ! “.$\ (gAfinobx L5LL:\'\L buck “3Q ,d v. I v . It. .15. -..-.19.. - —- // Dead A and freJJeJ [Can U) 6/. 9.5' ’51:; 13.13 ”735‘ 7:. 0.3 7613: 2-27 2- 2» 3;; q 5‘9 4.0 7 A/bwaé/e (/m/ 54:559.: //7 Com/ores: IO” Member; ‘ I -. a 4... 10M: '/5000 ... 70%- - IJ‘UOO ...70 1:786 a /6’£dO//p 3 ‘ # I! L £0“. ‘IS'OOO-70 f: [5'300_70 .576 = /35m A? y o if :M'AQ'u/JOOO -29-:-: 3/5000170 76.3%.: — 8:600 :4; '_,-Uv£.y ‘ l5000-70—é— =/5000-7o "$223 a /2,/0$ ’/a J ' ,1 .. 31 Ms 1‘ ’- Isaac “70% -/.s*aoo-7o 5—“; = /0,3os /” We! fi// 0/ above resu/r‘s have been ”iv/t" //ea’ c AS 2‘0 ob fell? fire max/morn a//owab/c. ark/n .5 7’3»ch as exp/4079 J cur/132' 1/7 fie MP: 7‘. \\ L52. Lb\\&‘0:§ L “SQ a .§\ 2.? .\§ . ‘30 .E \ §§I§QA '5' 3 to fax Vt.» \ é 5.3 95. s 2-2:? 95 s e 0.? 33' V \\\ 2.92.2.3\\L \\V\\) a\§uw o\\9\ msémam \b\ twkmu'b ‘ ‘\\0h%§\ .. ag—‘i‘ Q\-— OQQRA - £Q’R 6001\‘ “VA ‘ “\* m2 £\ 3 03—2. 0‘- om}\ = '3; Q‘ - m‘Z-\ . {Q 0; ¢“\\ Q'cQ .:\ = 952- mv bub'zx = 7*- m— ooozv N ..\5 ©0313 - 5;: QK— 0062A = $m- oom‘t\* “mm n k x 3 “u\* Q 2°€®\ = 5‘13- Q'i-QQQ‘EA‘ lb"- oowm = ;; 3.3- [bs\\ \\\QK\ «95$ =N§\\ c.\\uz,=-& 2w o$u \Q \\Q\ ‘- s\o\ D\dnwo\\u NMVV. BM 9* “\9‘\ do GK '2. .\ x? 3* «x x9\\~we \: s“\§\<\19 2.“ each-wk z. «\‘Awo .\ 393% 444M“ “d3“ T L l, u‘lflvfififi“ . A. r _ 4. _ ‘0 ‘1 A“, 1.31.: 1:19 tq (,4. 1‘4, tau, 0.4 “than. M MU. Us 1' 0" ‘ load AZ 4fl+kfiu.¢mz\\ x\ .2“ N u? N . “Qv adx $5.: 3‘ 2632.6 xi: 365—5.? _.VN in .5 flaws «huh. gsobonwuzfi. \Oimh WQN‘ skfiid. nfixx 2..“ .1286. Dun—Th4. 36‘s.“: 2.: 70M in.~&1fl.h&$~fi~§.~nfiusnhfl.§>o$\.udsmvkownhsxm. \Dxbk Mm; .3 \K. E... I... o3. 5% .b. ...N in.» 34. we.» 0....» ,, |k¢wt\ \hxmm on. ..u. on. FM. my. 3.. mm. 2. 3.. 2.. Mn. uh. HES». NM. k». 3W... 0 . h r». on. 2. m... ..u. m... a... .2. uh. u: 2.. was. «2 ..M. 3. fl... .... r&. up. on. i. m... 03 pm. mm. mm». nu: 3.x». hm. am. NN. ... an. ..M. Q. ru. I. on. wr. .... Mun... Simo: Mr. o~< 0N. .m. Mu. .... mm. um. MM. 2. 0... R2 rm. 0h. oh.m..n..md. Mn. omiv. M\. \l n .n. «M. M? an. E. 3“. Q... 3. 9n. mgmfixflfl ru< rN. ...». nu. E. Mn. 00. rm. hoimh. r: t... 3. . 3.5.. N\.nw. wk. Mm: mm. Mb. N TM. rN. 2. Ma. r_. MM. 4.». #0. 3. nn.~ 004 oZNn< NM. 0». rd. .3. rm. 2.. TN. to. Mt. hm... hm. TQ. that w». mm. 3.8. m.§.\ k\. N \ In. an. 2. 5. um. an. 4... yo. .5. r2 o...§..?3.< $8$¢J83€¢$ 3: $1: «a «is stiétisivsiiswx ,3 my: .3 ..3 Now «mm ‘83. II a z I .1- I - -I- ....N - a u-.. -- 5A 4] V 42 IV V A A fl?» y’aLY/t «IE $37.36 1.63;.) 4:3 ~52 ry ..c 2.3 yr; .3ov it wk? 9. no .vrr avay fir} ..va ..er uh...“ “mm (00V r IIH ‘r‘ a "a an ._un: f. 2... 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LL +I ”‘5 Mam Doc {0 3 7, 800 1070/ 4000/ ”‘15 load Allowab/e 61b load -/ 5 umma r7 Jfr ”77ch 0’32 (9 2.5” 3 8/.8 /0/o l7. 6 z 4000 450,500 /7.3 /3 9, 50-0 3 a q, 000 / 0,400 5607 Beam: 45'"! C? 423' 7f 9‘”. 8 57- 9/7. 7 265000 634; /?3 4/45 000 /, /34 000 um‘bsa VQC'SR $.Sv ‘E Y‘L\ E‘: 8 AP? Xe, \' X \K’ ooagx svzé 7.3x coo 59% 06% 0’ E.\ \\ 1\ Y‘ BMNQCJ Lakm’ke, zxsgmx \‘\L \ QQ>\_=\ \ bdmsm *2. .3\ § 31‘ B .V?.(\\1—( ibQ‘Qvli “bec 3252. mnuu3,?£\§\ “E. E. E..\ .V\\ - I) 8 .\$ 7:. S) 'S_ \Sfl \u‘m'xgnQ \osamk) QR .\Q\ o\‘ Q\ “0% ex :31“ \bQ —3 R\ 3 .Q§ X\2X\ s\<\c)\\ QVA “ “N“ $6.5“: Q\.\?\ mom> s. oo 2.\ aasx‘xi, ’mxw as“ B\ QQWQKR cm a. \ 31A ODE. ‘9» 3mm \em‘t EX\ 0 e§'¥m%mo\\f\ ._\.Q 3&3?“ 9\ §9W0\\(\ 0'57: 1" E,\ 00 2 .39? 69‘ 1* s; xch 6‘“ 1* A; .KQM 06 8 8 i, bQQ WON ¥J§0~X \‘quk 006 0" s ‘E, km): EVE s\$gwo\\‘9\ \ \onok b\1\.\ oovg\ D/A GEAM SHOW/N4 MAKEUP A/YD 57761555155 OF MEMBERS /~ fish/g” E (/g, /"' l/L/I’X/gu IQ Ll; /“'//4f” X/a‘, I? U; /"' z/X/E” ’2 05* 06 /“ V‘lfl‘Y/‘igu/E C/7 Non/~43 .' 5+reaac’: 5/70wr7 are, / ‘9“ k‘D‘L' 77"? K 01‘ 574 K (“L +1. P 72/? #01... $4.31.: 1,2. Mar/mum Dead (01-) 0/70/ A/Vc’ Aoaq/ {Ltd-1') VI {13‘ plus xm/oacf Jr‘rasae; lg 00 Q: ¢ \ ‘0 ,1" ‘9 D" x0 a t: g x‘ w ‘w v WV. u ’1' 0V SH ('9 9-“ Q) \l \ ‘z' \“ ”L * Q\ ‘L f? 4 3 3 3 ’° Kg 3‘ M M \L .y M m 3' Q 01 3 = 5- N :F : N. \W 0‘ + \ r N 3': ox? v <9 w * H ’QVK ‘0 * I: e \ 1. \Q * ' o)" 0 4 ‘6 y, v :1. ‘§ +« \L V 4 0 'g,’ a. Q v G "’ .Q Q 4 J: < (5 \I \L \J \b 3; Q ._.-G: = AL Vx a) )5 Q :3 Q t‘ o 9‘ (0' < “\V‘ r\ (“v 113 $50 <5 ‘1 N f: “AA I”. U I k \03 “o : «~< 0’3 '\ m \’ ”’V ‘\§- 0 ‘30 7“" “‘5 19. C1 3 (x ‘0' :Klb‘ oy‘ 1" 2 6+ =Kl 1' X a? 31 ‘3‘ E 0 Na < N 0V M ‘0 ca » $1 0 w: - a? ,. x 3/ " ‘ 3 " ,. ,, .. , Z t 9 2-9/2- K /v 4~ ‘fl/z x 3A9 4- 4é x/i/M' £2. [(4 1.5 £6 £7 5—5”: KLL-I-I One- Ha”: fipan " “T Panels @ 15t’qé‘.3107"72€ Ense ..- u‘ 301—. on 6/. 95 /<’DL. 38./ KLL +1.” 75.53 1:: Di... $25.? «1,143: .1 .llIlIlsfil. it (16) With the preceeding assumptions and calculations, we find first that the floor and floor stringers limit the cap- acity to axle loads not exceeding 10400 lbs per axle. rur- ther, all intermediate floor beams' hangers are limited to a capacity of 13400 lbs per axle. The end hangers are limited to a capacity of 16400 lbs per axle. The upper counter diagonals x3U4 and £506 are limited to 9500 lbs per axle and 17500 lbs per axle respectively. These are the upper diagonal members in panels two and three, slop- ing toward the center of the top chord. They consist of one 7/8" square bar each. Likewise, the lower diagonal L4M5 is limited to 10400 lbs per axle. This is the lower diagonal in the third panel sleping toward the center of the tOp chord. It consists of one %” square bar. Other— wise, the trusses figure safe for legal loading. In view of the above, it is recommended that the structure be posted for loads not to exceed 9500 lbs per axle. It is further recommended that this structure be reinforced at an early date to safely Carry legal loading and remove the necessity of any posting for limiting loadings. This would be done first at such time as the present floor be- gins to show need of repair and we make the following re- commendations for this work. 1. Replace the present 6" I beam stringers with nine lines of 8"-19# wide flange beams. These should be welded to the present floor beams for rigidity. 2. Place a new timber floor consisting of 2"x4" treated tim- ber of structural grade yellow pine or Douglas fir. These should be placed on edge and preperly spiked together and fastened to the floor stringers with suitable steel clips. 3. Provide protection to the treated timber as well as traf- fic markers for one way traffic by the placing of 30"xi" multigrip runner plates for the full length of the structure. These plates should be bolted to the timber floor with bolts at not more than 1 ft. spacing. A bituminous seal could be used for this purpose in place of the plates but is rather more difficult to seal to the treated timber and does not have the extra provision of providing a traffic marker which the writer has noticed does help materially to keep traffic in the center of the roadway, thus lessening the possibility of sideswiping the trusses by traffic and providing a more equal distribution of traffic to both trusses of the struc— ture. 4. The present structure has only a 1%” pipe railing which is not a protection to the trusses against collision. It is therefore recommended that a substantial hubguard be (1'7) placed consisting of a 10" channel, smooth face out attached rigidly to the truss members and at a height of about 16" from the top of the floor to the center of the channels. 5. Strengthen the weak truss members by the addition of a third member of proper size in each of the weak sections to prop- erly carry the stress in these members from the loading above mentioned. 6. Clean and paint the entire structure another coat of paint at the time the floor is removed at which time the most thor- ough job can be best accomplished. 7. Remove, clean, cover well with a fiber grease, and replace the rollers in the bridge shoes on the north end of the bridge. With the above conditioning, this structure should be suit- able and safe for legal loading for many years to come. It is very evident from the size of this structure and the rel- atively light volume of traffic which it gets, that its life should be prolonged as long as it is possible to do so with proper safety. Below is attached a photograph of the bridge shoe mentioned above. w‘\ '\ \A x«_ *x‘\, \ My ~V\~~‘\/\_—~\~\_ . /,2 2 2a) 77 / 5 SUP‘P IIIIIIIIIIIIIIIIIIIIIIIIIIII II -q¢9lr"~‘l luff LEM... .- MAT:QI§I EUNIVERSITY LIBRARIES LLIBIILIII * m... D. _._. T.‘ A M W. F m N M H W S NIVERSITY LIBRARIES IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I 03149 3863 c {43.13 Ti -‘; MIUHIQAN 3 is 3A.,‘wiiry‘fi, Ninja. not}; we!» . . FAG‘I‘ nwsswj‘, - "v‘f 4 - 4 - a wfi- ~ V.:FY.‘! -'\v r.- . H ' ‘ l ' . \, .‘ ‘ I I ‘ ‘ ' ~ I I , 1:7. “I UI‘xIIkEHQ " 31293031966 “bud“.mr I ' - . . ~... v. “fl“ ..- .?“ k . L“~:‘m.——..'_J——_- ‘. --._ -_ . _ _ l l _