Laserfiche WebLink
45ggp Federnl <br />/ Vol. 5I1.. No. 209 / <br />lnstal]stion, cr the ride+ oi aa <br />eznvetloa <br />Tabatated dam means tabiu end <br />charta appcvved h <br />a d <br />used tn dntga <br />xr <br />professinaal engin <br />aad wcatruct a Qrotecrive rystem <br />I}eneh Crrench ocrsvatlonJ mesas a <br />parrow eSfAVatlo¢ (ta rrlfleoa tn ib <br />length) mada below the iurfaee ot the <br />grouad. in gmecal. the depth is greeter <br />thaa tha width. but the width of a Csarh <br />(measured st the bottam) ia ent groater <br />tLaa 15 [eet (4.9 m). 1[ farms or other <br />shvcturee ate lcutalled ar com4ucted in <br />xcavadon w ae to reduce the <br />enstoc measured fivm the (ormi or <br />V <br />■tructure eo the eide af the ezeavaCOn tn <br />15leet (4.B a) ar leaa (meaevred at the <br />bonom of the ezcavatian). tbe <br />IYtivstlon (s eleo comidend to be e <br />Cench. <br />T}ench boz Sez "Shidd' <br />' <br />Trench rhie!d See -Shield.' <br />. <br />Uprightr neaa+ the vertiral memben <br />' <br />oE a hreac3 sharing entem placed la <br />Wntad with the eerth aad ttsually <br />poettioned so that lndividvsl memben <br />' <br />da not coasd eaeh oiha. Upr[ghb <br />laced w that [ad;-vidnal membm ere <br />p <br />tlosely sPaced, in cvnmd with or <br />• <br />intercanaected to each othe., are ofua <br />called'ahr_tiag.• <br />embers of <br />Waler meens horizaatal <br />i <br />ml <br />sharing s9stem P~~ P~ <br />ocravatiaa facz whosa cdea beat <br />agaia+t the rertlcnl memberi of the <br />Et <br />shocieg ay3tem or eArth <br />f tsxsst G.n.ral rwuir«++«+ta <br />(e) Surace enc,tmbrancu. All surfa <br />s <br />eacumbrances tSat are located so as tn <br />aeate a hazard tu employees ahall be <br />~ <br />semoved ar =uppaRtd. as aeeessarY, to <br />r <br />saFegucrd emPloYees. <br />(b) Uadergzsvnd irestcllotians. (1J Tl <br />qtimatsd Locatton of utflity <br />jytalletioas, euch as uwer, telephon <br />(nel, electie water lines or aay otha <br />nndergtoaOd inatallatlaas that <br />reeaaaa6ly may be expected W be <br />encoanteced during excavatlaa wock <br />rhall be dntermiaed grior w opeain8 <br />exuvatloa <br />(2) Utllity wapaain or ow¢ers sha <br />be cantacted witbla ntablinhed or <br />eustomary lxsl cespame tfinee, advis <br />oi the propoeed woclc. end asked tn <br />establiah the location of the uNity <br />tmdergromd iastnllationa prior to the <br />start of ectnel excevntloa. Whea utili <br />" eompenies or ownen canaot xeepand <br />a cequest to locate imdergound ntlll <br />installetloss .+ithin 1~1 huvn (ualees a', <br />longer period ta requirad by etate or <br />]xal law), or cannat eeteblish the ezact <br />loeenon orehe,e msteuano a ~ <br />employa may F~~1. D~ . <br />y <br />employer dnes eo with mutioa md <br />j; <br />provided detectioe equipmeat or ot6et <br />October 31. 1989 f&ulea and <br />•cceptable meaaa tn lxate ntllity <br />taatallstlana nre tued " <br />(3) When ezcavatlan opesaGOas <br />appeoach the eatimated locaeoa of <br />nndecgwnd Inrtallicocs, the ezact <br />locatloa ot the ia+tallaaom ihall be <br />deterained by safe aad acceptable <br />me•ns <br />(4) Whtla tha ezcavatloa b opea <br />yadergvund tnatallaGOns shnll be <br />pcotected.supparted ortemoved u <br />yeceeaary te safeguard amployeei <br />(e) Accest and egreaa-{1) StrvUural <br />7 (iJ Stiuctural ramp+ thet are uxd <br />lry by employees u n meeas oE <br />aecess ar egreas (ram exuvaCons shall <br />be dmiped by a cos.peteat persoa <br />Sttuctursl ramps a+ed tor acws or <br />egress o{ equipment ahall be designed <br />by a wmpetent penan qualified in <br />shuctuisl deaign, and shall be <br />eoasCucted in eccordaaca with the <br />dnigz~ <br />[u1 Ramps and runways eo¢sCvcted <br />o[ t4/a or mocx atructural membr-s ahaIl <br />yave the strucriual mem6en comected <br />tegether to prevent displacemml <br />(iuJ $tuchsal memben wed foc <br />rampe aad runways sSall be of uaiform <br />tbirSnees <br />[ivj Cleata or other appropriate mepTl <br />used tn eonnect cuaway sCvdural <br />membecs ahall be attached W the battom <br />of the rvnway or ehall be attached ia a <br />mamer to preveat ffipping. <br />(v) Snvc:msl camFs u+ed in lleu of <br />stepe ehall be pecvided wtth cleah or <br />other iarface ceatmeaU on the eep <br />sur{gce ln preveat stippiag. <br />(2) Means e/ egrrss f+nm Crnch <br />ereewtiam. A atairwny. kdder, ramp <br />a other safe mesaa ot egreas ahall be <br />laated in Csnch esmvaEona that are 4 <br />feet (122 m) x more m depth w u to <br />reqmre m mors then ?S feet (7.8z m) af <br />lataal navel Eor rmptayeea <br />(dl EzPeaeur W vehfeular bTTie <br />Emplo},ee, exposed ta puhlie vehlculnr <br />naffie thall be peovided with. end ahaIl <br />weer. waming veeb or athc suitable <br />gummta marSced with or made of <br />ir.pecioriud or high-visihiliry materieL <br />(e) ErPa+++re tO h+llinglocd: No <br />employx shall be pamitted mmdemeath <br />luads 6andled hy IifCag or di8gu18 <br />eqaipmmt Employeas shall be tequierd <br />to ~taad swey from aay vehiele beiag <br />loaded or unloaded to awid being <br />strucC yy any spillage or talling <br />materials. Operatan may eemaia la the <br />eaba oE vehiclee beiag loeded oc <br />valoaded when the vehicln are <br />equiPPed. in eecordaace wtth <br />; iyzo•eoi(bne), ro yrovide edeq,sete <br />pcotatlon tor the operetor dorieg <br />laadiog and anloading operations. <br />(n Wcrning rysum Jormobile <br />equrpment Whea mobile equipment'v <br />epented adjecent tu an ezaavetloa or <br />when .uc4 equipceai ia requi:ed to <br />appeoech the edge of an excavatlay and <br />ths opetatar doea mt bave a clear aad <br />dlccet view o( the edge o[ the <br />occnvatloa a wemiag syrtnm ehall be <br />utlliud such es barricadm hand or <br />mechaniul signele, ar atop logo. It <br />pc»sibla the gtade s6mild be away fiara <br />the esuvatlaa ~ <br />(g) Hazcrdovs aL^rosphem-(1) <br />Tnting cnd mntrols Ia edditlon to the <br />requiremeat+ eet (orth ta eubpazu D aad <br />E of thia part (29 CFd 192950-192&107) <br />tn prevent expoaure to harmfulleveL oE <br />ataoapheric co¢tacuaanb and te aaeucE <br />accepta6le atimospheric condiRonx the <br />taUowing requueceab ehall apply. <br />(i] 4Yhece oxygea deficieacy - <br />(stmoepheres containittg lese than 19.5 <br />percent ozygea) or a hazardoun <br />atmoephere ex1sG or eould rea3onably <br />be expected to es:sC auch u in <br />ezcava[Ioca ia lanc`fifl areai ar <br />excavatloan in arean where hazardoa.s <br />subetaaces are ecor.d nearby, the <br />ataoepherea in tLe excavetlou ahall be <br />teeted befare cepioyer, mter <br />excavatloas great_~ than 4 Eeet (S.L o) <br />in depth. <br />(u) Adequate precauCOm ehall be <br />takea to prevent enployee ezpoeure to <br />atmosRheree eonts'^ lue than 195 <br />perceat ozygea aad other hazardou <br />rtooepheces. T6ese pruantlone indude <br />pevviding proper teapiraWry pmteClan <br />or veaClatlaa in acmedaace with <br />rubparts D and E of thia part <br />respectively. <br />(iii) Adequate preceaCon ehall be <br />ta}cen sucS ai providing vmtllatioa tn <br />pcsvest employee uposure N aa <br />atmoaphere containin a moaatration <br />oi a IIammable gu in excesa o[ 20 <br />peromt af the laMa IIammeble liait o[ <br />the gas. <br />(iv) Whm eonCals ere ased that acz <br />iatended to roduce the level of <br />atmaapheric caae•m;n•nts te aexptable <br />levela. tdtlag tkall be conducted u <br />oRm as aeceaaary m eawcs that the <br />amioaphere cemaim safe. <br />(2) Emergency rescue eqvipment (iJ <br />Fmergeacy rexue equipment auch b+ <br />breethiag apparatus. a aefety hamess <br />and liae, or a baeket etretcher, ahall be <br />rendily availeble where hasardoue <br />atmoepheric condition+ ezirt or may <br />reasooahly be expeeed ta develop <br />duriag work in an ezmvatioa Thie <br />equipmeat ahall be ntteaded whm m <br />ux. ' <br />(ii) Employeea entering bel3-bottom <br />pia holes. oe otSer similar deep aad <br />caefined foatiagezcavatlom. shell wenr <br />a hantese wilh a lile-iine setuielY <br />attacbed tn iL T6e lifelme ekall be <br />separate hnm eny Gne aied to handle <br />metetialh aad thaY be andividually <br />-7(o <br />