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4 45yga Fedetal Regieter / Vul. . No. 209 ~ Tuesday. Octo6er 31. 1989 / Rules and <br />Appecdix D to Su6part P <br />Aluninum HydruulicShoring jor <br />Trenches <br />(a) Scope.'I'Ais aPPendiz cantaina <br />infocaation that csn be used whm Aluminum <br />hydndit fhorin8 is pnvided u a method of <br />pntection againat uvaW [n trencha lhal <br />do cal ezceed .'b feet (0.3m) in depth. This <br />Appendix must be uaed when deaign o( the <br />,luminum hydraulic Drotective system unnat <br />be perlermed ie ~ccordsnce with <br />! I9m65z(dUL <br />(bJ Sai/ Classi(icaubn. In ocder to uae data <br />prc3 ented in Nia eppendiz. the soil type ar <br />type, in ~hich the exuvatlon ia made muat <br />firat be determined uing the aoil <br />duaifiutian msthod set farth in Apper.diz A <br />o[ subP4rt P af 7aR 1929. <br />(e) P: e+enmtiort oJln/armatian. <br />Infocmatian ia preaented in several Iertns aa <br />{ollows: <br />j1J Intormetlon ie preaented in tabdar fom <br />ia Tabl[a Q117. o-12 8-12 and E-1.4. Each <br />taSle preeenu the maxi_"ium verunl and <br />horizantal apecizgs thal ney be uaed wit6 <br />variow eluesintun nember iiua and various <br />hydnulic ryl"mde: eizn. Each table wnteina <br />data only {ar the particular aail type tn w6iu's <br />the exuvatlon or poraon o[ the ezuveuon is <br />made.Tablea Q3.1 and 6-S2 azs for vertical <br />shoiea In Typea A md flsoiL Ta61ea 6-1.7 <br />and 01.4 are tor harizontnl weler Syatema in <br />lypea B and C soit. <br />(2) Ia[ormetlon conceming the beaia ot the <br />4hiJardataandthe le~~ndix~ <br />pteamted in Panga0h(d)oFthiaaPP~ <br />(3) In[ormarion explaining the uae o[ lhe <br />fahdar dau ia preeented in pangnph (e) o[ <br />tyis apPendiz. <br />(4) latormeUan illuehating the uaa o( the <br />Lbular data is pttxnted in yaragreph (Q aE <br />Ihia appendin. <br />(s) Miicellaneous notationa (toomotee) <br />tegezding Tsble ~-1.1 thtvugh T~1.4 ue <br />pmxnted m parsBrePb (8) o[ a apP~ndiz <br />(e) Fgure~. u(useatlng typinl tnsullation <br />oi hydnulic tharing. +ie induded jwt prior t <br />Ihe Tablee-The illwaatlanJ page u entitled <br />-Aluminum Hydreulie Shorin~ Typinl <br />3ytellaGa^, • <br />(d) Baars md limitaUons of ehe data. <br />(1) yertinl share nila end hotirantal <br />,eln.ate those that meet the Seccon <br />Modulw nquirementi ia the 6-1 Tablea. <br />Aluminum materisl'u e0e1-T8 ar material a <br />equivelent ahength and ptopertiei <br />(2) HyMulic rylinden specidicadona. (iJ . <br />{nch cylinden shall 6e a¢inimum 2•iech <br />inside diameter with a minimum u[e worki <br />opacity o[ no leeo than 1&000 pomde utial <br />eomprea31ve Ioad at maximum eatensiaa <br />~ Mazimum extensian b to Indude full nnge 'eylinder eztenaiana aa rscersuaended by <br />praducl manulatuven (I9I }tnch cylinden shall be a minimum 3. <br />inrh Ineide diameter with a safe working <br />uQacity o( not leaa than m000 pennda axial <br />eampraaive laad at ezteneiana aa <br />rowmmended by Droduct manufecturer. <br />(3) [lmitation of application. <br />(I) It ia nol intended ihet the aluminum <br />EydteWic sPKifcation apply lo every <br />,iluation thal mey be experienced fn the <br />field. Theae dals were develaped to applY t° <br />the simeGOnc Nat art maat eommanlY <br />esperienced in cucrent Cenching pnctiee. <br />$haring ayatema far uie in aituations thal am <br />not mveied by the dau in lhia appendia mwl <br />M olherwix deaigned am speciRed in <br />f 19-'6652(c). <br />(iiJ WAen any of the fallawing mndiliona <br />art prexnL the memben speciRed in the <br />Tablea sre mt wnaid<red ydequete. in tF.is <br />usc an aItemative aluminum hydnulic <br />~haring ryatem or ather type a[ pntectice <br />fyRem muet he deeigned in accordance with <br />i 192SESL <br />(A) YJ6en vertical loada im.poaed on coaa <br />bneea eseeed a 100 Pound grevity load <br />distributed an a one foot sectian of the cer.ter <br />o[ the hydnulic tylinder. <br />(8) W hen aurcharge luda ace pmxnt from <br />equfpment weighing in escesa oI20.000 <br />pounda. . <br />(G) When only the lower portian or a <br />tene4 is sharcd and the remaining portion af <br />the Cench ia sloped ar benehed unlnr. The <br />iloped portiort is sloped at an engle leaa steep <br />Lhen L4ree harizontal to one vertical: or the <br />meziben an selected Lrom the lables for we <br />■t a depth wEich is deter.nined kam the top <br />of the ovenil cench and not (ram the lx af <br />the alaped portion. <br />(e) Use o/Table: D-1.7. D-t.2 B-Ii and <br />D-I.1. Tbe mem6en o[ the 3haring system <br />that are to be ulected uaing thia informaUon <br />are the hydraulia cylindem and eitha the <br />vereerl ehona ar the harizontai walea. When <br />a waler syrtem ii wed the vercnl dmber <br />sheetlng to be wed'u dio selected lrom <br />thex tahles The Tabin 0-1.1 and IY1S far <br />vertf ral ehom ue uaed in Type Aand H wiL <br />that da nat frquiro theeting. Typa 8 wils ihat <br />may cequ'ue +heeting. and Tvpe C wita that <br />alwsys requue theeting ete (amd in the <br />horizontel wale Tables D-12 and D-1.4. The <br />wi1 type mu+l Cnt he detersmined in <br />aewrdance wiW the aoil duaiFintien <br />rystsm desaibed in appendiz A to subpart P <br />u( paR 1978. Using the appropriate table. the <br />mlectioa a[ Ne size md spadng of the <br />memben is made. The selection ia based on <br />the dep(h And width oF the cendf whero the <br />memE<n src ta be Wtslled. In thne ti61n <br />the vert5ul spadng is held rnmtmt at four <br />fect oa anten T6e nbles show the ma:imwa <br />horizontal apacuy o( cylinden dlowed for <br />sar.} iize a( wele ia the waler ryatem hbles. <br />and ia 16e vertiul sham n61m the hydnulic <br />ryt3nder horizundl +Oadng ia the aame u the <br />vertlnl ahom opsdng. <br />(Ij EsamPle m!/lustmte the C're of the <br />Ta61ea: <br />(1) Esarnple 1: <br />A trxnch dug in Type A aoil is E feet deep <br />and J feet wlde. Fmm Tahle 0.1.1: Find <br />vartiral ihorca and 2 inch diameter ryliaden <br />spead e teet on aater (o.e) horizoohlly and <br />4[eet on center (o.e) veRically. (See FiBurea <br />1a 7 far typical inatallations-) <br />(2) Fxample 1 <br />A trsnch is dug ia Type H aa0 that dces nat <br />=equirc abeeting.l] Itet deep and 5 feat wide. <br />From Teble o-12• F'ind vertiul shores and 2 <br />larh diameter rylinden ipeud 63 (eet o.a <br />6or'sontally end 1 feet o.a vertieetlY• (See <br />Fqures I s] for typiul InsuliaEane-) <br />(J) A trench ia_dug in Type 8 wil ih+t doee <br />not rcquim eheeting. but dxs esperience <br />wme minor ravvling of 1he tenr3 l+ce. The <br />trenth ii 10 teet deep and 9 feel wide. Fmm <br />Table o-ls Find verliul shorea and 2 irtch <br />diameter cylinder (with apedal ovenltevea <br />u daiynated by foomote *21 apaced S! feet <br />~ M1orizonlally and 4 feet o.c verti"lly. <br />plywood lyer foamote (g)p) to the 0.1 Tabiel <br />alwuld be uvd behind the sharn. (See , <br />F$urea 2 d 7(or typiul inalallaliona.) <br />(4) Ezample 4: A I+ench is dug in pcevious:y <br />diaturbed Type B aoil. with chancteriaiiu of <br />a Type C eoiL and will requirx sheeting.7he <br />Eeach ia 10 feet deep and i't feet wide. B faat <br />Eorsar.tel apadng between tylinden is <br />desired !ar working a0aae. Fmm Ta61e 0.1.7: <br />Find horizoatal wale wilh a xctien madulua <br />o[ 14.0 spaced at 4 feet ae vertinlly and 7 <br />inch diameter rylinder epaced at 9 feet , <br />maxiaumo.eharizantaliy.]xl2tinL•er tEeeting ia cequimd at close specing . <br />veRiculty. (5ee Fgure ! for typical <br />inatallaHon.) <br />(S) Ezanple S: A tceneh ia dug in Type C <br />soiL 9[eet dr_p and 1 feet wide. Horizaanl <br />rylinder apadng in escesa o( E teet ia deai:ed <br />Iac worlting space. From 7able 0.1.4: Find <br />horizontal wale with a xctiaa modulus aF 7.0 <br />And 2 tnch diemeter rylinden spaced at 6.5 <br />Im[ o.a harizon411y. Or. 6nd horizantal wale <br />vrilh a 14.0 Sectioo modulua and 1 ineh <br />diameter rylindec spawd at 70 feel o.e <br />Lorsnntally. Both wafn aR apaaed 4 feet o.e <br />mtirally. 7x 12 tlmber sheeting ia requind <br />at doae ipac.inp vertintly. (See Fgu=e 4(or <br />eypical inst,u.uaa) <br />(g) FooNOtes. and genemi notei. /or Tab/es <br />B-tZ Qtt 6-tS and D-t.I. ' <br />(1) For applicatlooa at6er than Lhoee Iieted <br />ie the tablm te[er W; 1915&1i2(cj(2j for we <br />of manufaetuisev hbulated da4. Far tenah <br />deyths in ezcesa of 7D teec rctcr to <br />i 1978652(c)l21 and S 1920.aS2(c)f71• <br />(2) 2 inrb diameter rylinden, at thia width. <br />t6aP Save fCUCtunl ItKi Nbe <br />(33xMY.0.1875) ovenleevee, or iuvcturzl <br />wasleeves oI maau[actwer's eped6rattian. <br />utending the IuLL mllapxd length <br />(7) Hydnulie qliaden npadtln. (i) 2 inch <br />rylinden shall be a ninimum 2•inch inaide <br />diameter witE a wte warking capacity ot not <br />kss than 14000 pouadi azial wmp'eeaive <br />Iwd at muiaum estensian Muimum <br />utemiae is ta tndude full nnge af rylinder <br />•ztrnziona ~s mwmmeoded hy pmduct <br />manuGcturcr. <br />(6) Sinch rylinden shatl be a minimum Y <br />mch inside diameur with a wfe wark <br />opadry otnot lesa thsn30.000 paunde azial <br />wmp'eaaire load at masimum eztenaian. <br />Muimum'stemion ia to include full range o[ <br />ryGnder e:tensiani as tecommended by <br />peoduct manuGcturer. <br />(4) All ipadng iadicated'u measured <br />esnter to anter. <br />(S) Venical thoring r+ils ahell have a <br />minimwn aectlon modulus o( 0.40 inch. <br />(8l When vertial 3homa am uxd lhere <br />muet be s miaimum o[ three shorcs sp+ced <br />equally. 6arizontally. in a group. <br />(7) plywood iAell be 1.125 In. tAick <br />wftwaod or 0.73 inch. thick.l4 ply. arctic <br />whilr bireh (Finland form). Pleex nate thet <br />plywood b not intended uA auvcturel <br />member, but ovly (or pm•entian of local <br />nrelietg (aloughing of the tcench (sce) <br />bemeen shoma. <br />96 <br />