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qsg7'.~. Federal Regiater / Vol. <br />daiaifiuHOn nethod xt [ort5 in eppendis A <br />olsuEpact P of us peri <br />(e) Prexnmtion oJlnJormatian. <br />Inlotautian u yresentr.d in xvenl formi as <br />roua...: <br />(1) In(ormatloa is prexated in ubular focm <br />In Ta61es F1.1. F12 and G-71 And Ta61ea <br />C-Li. G-iI and Cru follawing pangnph <br />EX1 of the appen'uz Faef' uhle presenra the <br />m,inimum aizc+ of tlmhz aecbera Ie me in <br />• eharing ayetev, md eech teble mntains <br />data enly (or the particulaz wil type in which <br />tha e:cavation or yartiao of the ezuvecon is <br />made.l'tte data are ar•nnged ta aIlaw t6e <br />user the tlezihility to xlcct Eom amang <br />"vera{ acceptable canfigwenona of inemben <br />6axd on veryicg the hcrizontel epadng ot <br />the eoubncea.5table nck ia ezempt (rom <br />shoring cequirer_ente and lherefocs. no dam <br />are Qxaented (or this condieor_ <br />(2) Infarmatioo mncening Lhe beaia o[ the <br />tabular data ar.d the 4milaeoca a[ the data is <br />preeer.:ed in parearap6 (d) of L4is appendix. <br />•nd on the tahiea themecivea. <br />(31 lrlarmatlcn ezplaining t•.e we of the <br />tabdu dau ia prosented in pazgtaph (e} of <br />thia e7per.diz <br />(4) Lnfo~a5on illustra:Lig L4e uee o[ the <br />Lbula: data is p+aented ie ya:ayraph of <br />"thia appeodix <br />(5) bfixellz^.eow notations regarding <br />Tablea C-1.1 t4:aug.h C-t.3 ar.d Tahles G-ti <br />thcvugy CrZ.3 ez preeented in Pnngraph (g) <br />of tlsia Appendiz <br />(d) Basis and !imitations of the dam.-{S) <br />Dimertsiom of tr'c+ber memben. (i) The aizce <br />of the C.m6er memben lirted ia Tables C-1.1 <br />thmu3h c-1.7 are uken Gom the National <br />Huteau o! Star.Cacda (i185) repert. <br />-geevmmmded Techniral Provisiom Cor <br />Cooatrv:tiua T. actict ia $haring er.d Sloping <br />o[Treaches and Fscavatioeu.' ln additloa <br />whets N85 did aot tecommend epeeifie fizes <br />of meunhen. member aius are baxd ee an <br />anslysu of t6e sises nquiced for ue by <br />gociating cadn md on empirical Pr*ctice. <br />(iil The rsquitsd dimemiam of the <br />memhen 63eed ia Tabin FLl lheough C-t3 <br />re;rs Wactual dimeaaioas and wt aomiaal <br />dlmensiaea aI the tlmber. EmPloyen wuiting <br />tn ux no¢unal siss ehoring ate ditected to <br />- Ta61es Crll thrau8h C-Z& ar 6ave this <br />ehaice mder ! 19a8.654c1171. md ue <br />m[ased ta The Corp$ of Fngsneaa. Tbe <br />Huteau of Redarsution ar data from other <br />aaeptable wutua• <br />(2) Gmimtion o/applicatiom (i) It ia not <br />Inteaded that the timber shoring spedfic+tle <br />apply !o every +ituadon that may be <br />ezyerienced in the field Thex deta were <br />developed to spply to tEe aituetlona ihat am <br />mest commonly ezperienced in eurrent <br />~ Renehing pnctice. Shoring rystems for we ' <br />situationa that ere not wvered by the data' <br />this appenLiz muet be deaigned uspetified , <br />la f 19m.esz(c1• <br />(ii) When ~ny of the tollowing eondiGana <br />are prexat the memben +pecified in the <br />tehlee ece mt cansiderzd adequata. Elher ah <br />sItemate timber ahoring eyetem must be 'designed or ar.ather type of pmtectire ryetem <br />deyigned in accordance with y 192dA<' <br />(p) W heu lud+ impoeed bY sWCNrta or <br />by stored meteriai adjacenl W 1he trench <br />weigh in ezcesa o( the laed impoacd by a <br />two-faot saii avmharge. The tem 'adiacmt" <br />No. 209 / Tueaday. October 31. 1989 / Rulee and Regulatiom <br />as uaed hete meena lhe ama within ■ <br />borixootal disunce hom the edge of the <br />trench ryual w the depth a! Ne trench. <br />(8) When vertiul loads Imposed oa avaa <br />6neea ucced a 7 W-pound gtsvity Iwd <br />diiCibuted oa a ene•[oot mction a[ the center <br />o( tLe aaae6ncs. <br />(CJ Whea aurcharge foads us pmsent [rom <br />equipment weighing in ezceas o[ 70.000 <br />peuada <br />(Dj When anly ihe lower portian o!• <br />ceneh u ehaoed and the :enaining partian o[ <br />LSe Ceach is elaped or ben@ted unleae: The <br />slaped panion is iloped at an angle leaa ateep <br />t6aa Nree horizontal to one verticel: ar ehe <br />memben ere xlected fmm the nblea (or ux <br />at a depth which ia determined from the top <br />a! tDe overall cench. aad not &am tl:e ms a[ <br />t*e sloped partioa <br />(e) Use of rablea. T'he me-nben o[ the <br />aboring ayatem t4at ace ta be eelected using <br />`a InCor-~a[ion are tfte c.-+as braces. the <br />cy:i5hte, end the wales. wherc walee are <br />z_quised. Min:mum aizea o( membe:s ace <br />s'xeiHed for ux in dilleront typn of aail. <br />TSere nre ais ta6lea of in(omatiam two foc <br />each soit type. Tne eail ry'ye muet Fnt lx <br />de!e.^ained ia eccordance with the eoil <br />c!,saification sy3tem deactibed in appendix <br />A m mbpart P of peR 1978. Using the <br />aPPmPriate nble. the eelectiun o[ the size <br />ud spscing o( u' e memben ia then'aade. <br />T`e a]ectloo ia besed on the depth and <br />width of the 2ench where the mem6en are to <br />be iaatalled and in moet inatancea, the <br />relectian is aLw baaed an the horizontal <br />tpacing of the coaabrecea. tnitances where e <br />c:aia of hor'vantil epacing o( awebrecing <br />is Availahle, tF.e 6orizontnl eqacing of the <br />coaabnrra must be chosen 6y tbe user <br />be(yre Ne aize of any member ran he <br />determined Whea the soil type. the width <br />aad depth o( the cench. and the horizantel <br />tpadng ai the avae6ncn are known, the <br />ii:s And verNnl spacing of Ne vosabnces. <br />Lhe sirn sad vertical spadng of the wales, <br />and Me size and horizanul a➢edng of the <br />nprighb wn he tead [rom the apprapriate <br />table <br />(Q Erampln to 117:utrvte the Use of Tables <br />FLI thmugh FtJ. <br />(1) Esample L <br />A Cench dug in Tyye A aoil u i] feet deep <br />and five [eet wide. <br />Fmm 7able Ft.t. for eccepteble amugemmb of dm6er un be used. <br />Anatigement s1 <br />Space 4X1 e9336cecea at iiz fett <br />hcriwalally and faur Ceet vettiully. <br />Walea are not rtquifed. <br />Space 7Xa uprighu at siz fe<t harizontally. <br />'13ia Acrengemeat ia wmmanly wlled "5kip <br />.horin8•" <br />Arrvngemmt =1 <br />$paa IX6 aeasbncea at eight feet <br />harizontally and (our feet venically- <br />Spaa Bx E weles et four teet verticaUy. <br />$pas 2x E uprighte at faur feet <br />6orizantalty. <br />yrvngement z9 <br />$pace EX E uossbnCen at 10 feel <br />harizonully and (our !e<t vertieiily. <br />Space 9X10 walea at four feel vertically. <br />$peu 2X E upriphb at flve (eet <br />6atizannlly. <br />Arrw+gement sf <br />Spa«exeQOUbneea.tufeet harizonhlly and lour teet rerdolly. <br />Spau 1OX30 wales at (ourleet vertiulty. <br />Spacea 7%8 uprigh4 at siz feet <br />harizontilty. <br />(2) Ecamp(e 2 <br />A aench dug in Type H soil in 17 feet deep <br />and Rve feet wide. Fmm Tabie C-t2 three <br />Aaepta6k oaangemmb of inemben am <br />liated <br />Amnyement =1 <br />Spacs Ex8 crasabracsa at Si: [eet horizontally and five ket vertically. , <br />Spaes Bx8 weles a five [eet vertlcalty.. <br />Spaa 2x 8 upr.ghb at two ttet <br />horizanhlly. A(rvngement =2 <br />Space 6X8 cras36acea at tight feet <br />horizentally and five feet rertically. <br />Sqece IOXIO walea at Fve feet veRically. <br />Specs 2X0 uprigha at cwo teet <br />horizontally. <br />Annngement =7 <br />Space 8 x8 C033hnc2a at 30 feet • <br />horizaataUy and fve teet verHully. <br />Space 1OX12 wsln at five het vertically. <br />Spaa 2xB uprighb at ewo teet verticatly. <br />(3) Examplel A trench dug ia Type C wil ia 13 (eet deep <br />and 8ve [tet wida Fiom Tahle C-1.3 ewo ieceptable <br />urangementa o( mem6en nn he uaed. <br />Armngement si <br />Space 8 X 8 0053bnCsa at uz feet <br />horizantally and five &et vertiuUy. <br />SQam tOX12 walea at five (est verttiully. <br />Poeitian 2xE upriphL ai claxly tuget6er <br />as paaaihle. <br />If watcr mwt 6e rclained uss special <br />mngue and givove uprighh to [arm tight <br />sEeeeng <br />efrrvngemmt s1 - <br />Spacs exlo aoabram ■t dght teet <br />6ar'vanntly And flva (eet vejtinily. <br />Spau 12X32 walea at Gve feet rertiwlly. <br />Position Ixe uprighu in a doae sheeting <br />canfiguntian udns rater pmaurs mwt be <br />teaiated. Tight aheeting mwt & med whae <br />water mwt be retained <br />(4) Eeample <br />A treaeh dug ia Type C mil is 70 feet deep <br />and 13 feet wide The sirs end spaeng of <br />memben (or ihe ietlion of hmeh ihel is over <br />15 fret in deplh is detecmined ming Ta61e C- <br />1.3. Qnly ane ertengament of inemben is <br />ymrided. <br />Spaa 8x10 ao"6neo se siz (xt <br />horizontally end Cve feet verttuIlY• <br />Spea t2x12wdu al fire feet verticatly. <br />Ux ]xB tight sheeting. <br />Use of Ta61ea Gd3 lheough F23 would <br />follow ihe ume p'vicedum. <br />(gl Notes Jor oll Tables <br />1. Member aizca at spacinga other then <br />Indivted e'e lo be determined aa specitied in <br />S 19:A.&3Z4c~ `Oeaign of Pcoteetire SYalema.' <br />ag <br />