45229CFRCh.XVII(7–1–99Edition)§1926.859(d)Anystructuralmemberbeingdis-memberedshallnotbeoverstressed.§1926.859Mechanicaldemolition.(a)Noworkersshallbepermittedinanyarea,whichcanbeadverselyaf-fectedbydemolitionoperations,whenballingorclammingisbeingper-formed.Onlythoseworkersnecessaryfortheperformanceoftheoperationsshallbepermittedinthisareaatanyothertime.(b)Theweightofthedemolitionballshallnotexceed50percentofthecrane’sratedload,basedonthelengthoftheboomandthemaximumangleofoperationatwhichthedemolitionballwillbeused,oritshallnotexceed25percentofthenominalbreakingstrengthofthelinebywhichitissus-pended,whicheverresultsinalesservalue.(c)Thecraneboomandloadlineshallbeasshortaspossible.(d)Theballshallbeattachedtotheloadlinewithaswivel-typeconnectiontopreventtwistingoftheloadline,andshallbeattachedbypositivemeansinsuchmannerthattheweightcannotbecomeaccidentallydisconnected.(e)Whenpullingoverwallsorpor-tionsthereof,allsteelmembersaf-fectedshallhavebeenpreviouslycutfree.(f)Allroofcornicesorothersuchor-namentalstoneworkshallberemovedpriortopullingwallsover.(g)Duringdemoliton,continuingin-spectionsbyacompetentpersonshallbemadeastheworkprogressestode-tecthazardsresultingfromweakenedordeterioratedfloors,orwalls,orloos-enedmaterial.Noemployeeshallbepermittedtoworkwheresuchhazardsexistuntiltheyarecorrectedbyshor-ing,bracing,orothereffectivemeans.§1926.860Selectivedemolitionbyex-plosives.SelectivedemolitionbyexplosivesshallbeconductedinaccordancewiththeapplicablesectionsofsubpartUofthispart.SubpartU—BlastingandtheUseofExplosivesAUTHORITY:Sec.107,ContractWorkHoursandSafetyStandardsAct(40U.S.C.333);secs.4,6,8,OccupationalSafetyandHealthActof1970(29U.S.C.653,655,657);SecretaryofLabor’sOrderNo.12–71(36FR8754),8–76(41FR25059),9–83(48FR35736),or6–96(62FR111),asapplicable;and29CFRpart1911.§1926.900Generalprovisions.(a)Theemployershallpermitonlyauthorizedandqualifiedpersonstohandleanduseexplosives.(b)Smoking,firearms,matches,openflamelamps,andotherfires,flameorheatproducingdevicesandsparksshallbeprohibitedinornearexplosivemag-azinesorwhileexplosivesarebeinghandled,transportedorused.(c)Nopersonshallbeallowedtohan-dleoruseexplosiveswhileundertheinfluenceofintoxicatingliquors,nar-cotics,orotherdangerousdrugs.(d)Allexplosivesshallbeaccountedforatalltimes.Explosivesnotbeingusedshallbekeptinalockedmaga-zine,unavailabletopersonsnotau-thorizedtohandlethem.Theemployershallmaintainaninventoryanduserecordofallexplosives.Appropriateauthoritiesshallbenotifiedofanyloss,theft,orunauthorizedentryintoamagazine.(e)Noexplosivesorblastingagentsshallbeabandoned.(f)Nofireshallbefoughtwherethefireisinimminentdangerofcontactwithexplosives.Allemployeesshallberemovedtoasafeareaandthefireareaguardedagainstintruders.(g)Originalcontainers,orClassIImagazines,shallbeusedfortakingdet-onatorsandotherexplosivesfromstor-agemagazinestotheblastingarea.(h)Whenblastingisdoneincon-gestedareasorinproximitytoastruc-ture,railway,orhighway,oranyotherinstallationthatmaybedamaged,theblastershalltakespecialprecautionsintheloading,delaying,initiation,andconfinementofeachblastwithmatsorothermethodssoastocontrolthethrowoffragments,andthuspreventbodilyinjurytoemployees.(i)Employeesauthorizedtoprepareexplosivechargesorconductblastingoperationsshalluseeveryreasonableprecautionincluding,butnotlimitedto,visualandaudiblewarningsignals,flags,orbarricades,toensureemployeesafety.VerDate189902:45Jul22,1999Jkt183110PO00000Frm00452Fmt8010Sfmt8010Y:\SGML\183110T.XXX183110TPsN:183110T
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