NFPA_0921_-_1998_-_Guide_for_Fire_and_Explosion_Investigations.pdf
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NFPA_0921_-_1998_-_Guide_for_Fire_and_Explosion_Investigations.pdf
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NFPA921GuideforFireandExplosionInvestigations1998EditionNationalFireProtectionAssociation,1BatterymarchPark,POBox9101,Quincy,MA02269-9101AnInternationalCodesandStandardsOrganizationCopyrightNationalFireProtectionAssociation,Inc.OneBatterymarchParkQuincy,Massachusetts02269IMPORTANTNOTICEABOUTTHISDOCUMENTNFPAcodes,standards,recommendedpractices,andguides,ofwhichthedocumentcontainedhereinisone,aredevelopedthroughaconsensusstandardsdevelopmentprocessapprovedbytheAmericanNationalStandardsInstitute.Thisprocessbringstogethervolunteersrepresentingvariedviewpointsandintereststoachieveconsensusonfireandothersafetyissues.WhiletheNFPAadministerstheprocessandestablishesrulestopromotefairnessinthedevelopmentofconsensus,itdoesnotindependentlytest,evaluate,orverifytheaccuracyofanyinformationorthesoundnessofanyjudgmentscontainedinitscodesandstandards.TheNFPAdisclaimsliabilityforanypersonalinjury,propertyorotherdamagesofanynaturewhatsoever,whetherspecial,indirect,consequentialorcompensatory,directlyorindirectlyresultingfromthepublication,useof,orrelianceonthisdocument.TheNFPAalsomakesnoguarantyorwarrantyastotheaccuracyorcompletenessofanyinformationpublishedherein.Inissuingandmakingthisdocumentavailable,theNFPAisnotundertakingtorenderprofessionalorotherservicesfororonbehalfofanypersonorentity.NoristheNFPAundertakingtoperformanydutyowedbyanypersonorentitytosomeoneelse.Anyoneusingthisdocumentshouldrelyonhisorherownindependentjudgmentor,asappropriate,seektheadviceofacompetentprofessionalindeterminingtheexerciseofreasonablecareinanygivencircumstances.TheNFPAhasnopower,nordoesitundertake,topoliceorenforcecompliancewiththecontentsofthisdocument.NordoestheNFPAlist,certify,testorinspectproducts,designs,orinstallationsforcompliancewiththisdocument.AnycertificationorotherstatementofcompliancewiththerequirementsofthisdocumentshallnotbeattributabletotheNFPAandissolelytheresponsibilityofthecertifierormakerofthestatement.NOTICESAllquestionsorothercommunicationsrelatingtothisdocumentandallrequestsforinformationonNFPAproceduresgoverningitscodesandstandardsdevelopmentprocess,includinginformationontheproceduresforrequestingFormalInterpretations,forproposingTentativeInterimAmendments,andforproposingrevisionstoNFPAdocumentsduringregularrevisioncycles,shouldbesenttoNFPAheadquarters,addressedtotheattentionoftheSecretary,StandardsCouncil,NationalFireProtectionAssociation,1BatterymarchPark,P.O.Box9101,Quincy,MA02269-9101.UsersofthisdocumentshouldbeawarethatthisdocumentmaybeamendedfromtimetotimethroughtheissuanceofTentativeInterimAmendments,andthatanofficialNFPAdocumentatanypointintimeconsistsofthecurrenteditionofthedocumenttogetherwithanyTentativeInterimAmendmentsthenineffect.InordertodeterminewhetherthisdocumentisthecurrenteditionandwhetherithasbeenamendedthroughtheissuanceofTentativeInterimAmendments,consultappropriateNFPApublicationssuchastheNationalFireCodesSubscriptionService,visittheNFPAwebsiteatwww.nfpa.org,orcontacttheNFPAattheaddresslistedabove.Astatement,writtenororal,thatisnotprocessedinaccordancewithSection5oftheRegulationsGoverningCommitteeProjectsshallnotbeconsideredtheofficialpositionofNFPAoranyofitsCommitteesandshallnotbeconsideredtobe,norberelieduponas,aFormalInterpretation.TheNFPAdoesnottakeanypositionwithrespecttothevalidityofanypatentrightsassertedinconnectionwithanyitemswhicharementionedinorarethesubjectofthisdocument,andtheNFPAdisclaimsliabilityfortheinfringementofanypatentresultingfromtheuseoforrelianceonthisdocument.Usersofthisdocumentareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,isentirelytheirownresponsibility.Usersofthisdocumentshouldconsultapplicablefederal,state,andlocallawsandregulations.NFPAdoesnot,bythepublicationofthisdocument,intendtourgeactionthatisnotincompliancewithapplicablelaws,andthisdocumentmaynotbeconstruedasdoingso.LicensingPolicyThisdocumentiscopyrightedbytheNationalFireProtectionAssociation(NFPA).Bymakingthisdocumentavailableforuseandadoptionbypublicauthoritiesandothers,theNFPAdoesnotwaiveanyrightsincopyrighttothisdocument.1.AdoptionbyReferencePublicauthoritiesandothersareurgedtoreferencethisdocumentinlaws,ordinances,regulations,administrativeorders,orsimilarinstruments.Anydeletions,additions,andchangesdesiredbytheadoptingauthoritymustbenotedseparately.ThoseusingthismethodarerequestedtonotifytheNFPA(Attention:
Secretary,StandardsCouncil)inwritingofsuchuse.Thetermadoptionbyreferencemeansthecitingoftitleandpublishinginformationonly.2.AdoptionbyTranscriptionA.Publicauthoritieswithlawmakingorrule-makingpowersonly,uponwrittennoticetotheNFPA(Attention:
Secretary,StandardsCouncil),willbegrantedaroyalty-freelicensetoprintandrepublishthisdocumentinwholeorinpart,withchangesandadditions,ifany,notedseparately,inlaws,ordinances,regulations,administrativeorders,orsimilarinstrumentshavingtheforceoflaw,providedthat:
(1)duenoticeofNFPAscopyrightiscontainedineachlawandineachcopythereof;and
(2)thatsuchprintingandrepublicationislimitedtonumberssufficienttosatisfythejurisdictionslawmakingorrule-makingprocess.B.OncethisNFPACodeorStandardhasbeenadoptedintolaw,allprintingsofthisdocumentbypublicauthoritieswithlawmakingorrule-makingpowersoranyotherpersonsdesiringtoreproducethisdocumentoritscontentsasadoptedbythejurisdictioninwholeorinpart,inanyform,uponwrittenrequesttoNFPA(Attention:
Secretary,StandardsCouncil),willbegrantedanonexclusivelicensetoprint,republish,andvendthisdocumentinwholeorinpart,withchangesandadditions,ifany,notedseparately,providedthatduenoticeofNFPAscopyrightiscontainedineachcopy.SuchlicenseshallbegrantedonlyuponagreementtopayNFPAaroyalty.ThisroyaltyisrequiredtoprovidefundsfortheresearchanddevelopmentnecessarytocontinuetheworkofNFPAanditsvolunteersincontinuallyupdatingandrevisingNFPAstandards.Undercertaincircumstances,publicauthoritieswithlawmakingorrule-makingpowersmayapplyforandmayreceiveaspecialroyaltywherethepublicinterestwillbeservedthereby.3.ScopeofLicenseGrantThetermsandconditionssetforthabovedonotextendtotheindexofthisdocument.(Forfurtherexplanation,seethePolicyConcerningtheAdoption,Printing,andPublicationofNFPADocuments,whichisavailableuponrequestfromtheNFPA.)9211Copyright1998NFPA,AllRightsReservedNFPA921GuideforFireandExplosionInvestigations1998EditionThiseditionofNFPA921,GuideforFireandExplosionInvestigations,waspreparedbytheTechnicalCommitteeonFireInvestigationsandactedonbytheNationalFireProtectionAssociation,Inc.,atitsFallMeetingheldNovember1719,1997,inKansasCity,MO.ItwasissuedbytheStandardsCouncilonJanuary16,1998,withaneffectivedateofFebruary6,1998,andsupersedesallpreviouseditions.Changesotherthaneditorialareindicatedbyaverticalruleinthemarginofthepagesonwhichtheyappear.Theselinesareincludedasanaidtotheuserinidentifyingchangesfromthepreviousedition.ThiseditionofNFPA921wasapprovedasanAmericanNationalStandardonApril2,1998.OriginandDevelopmentofNFPA921NFPA921,GuideforFireandExplosionInvestigations,wasdevelopedbytheTechnicalCom-mitteeonFireInvestigationstoassistinimprovingthefireinvestigationprocessandthequal-ityofinformationonfiresresultingfromtheinvestigativeprocess.Theguideisintendedforusebybothpublicsectoremployeeswhohavestatutoryresponsibilityforfireinvestigationandprivatesectorpersonsconductinginvestigationsforinsurancecompaniesorlitigationpurposes.ThegoaloftheCommitteeistoprovideguidancetoinvestigatorsthatisbasedonacceptedscientificprinciplesorscientificresearch.Thefirsteditionofthedocument,issuedbytheAssociationin1992,focusedlargelyonthedeterminationoforiginandcauseoffiresandexplosionsinvolvingstructures.Thesecondeditionofthedocumentincludedrevisedchaptersonthecollectionandhandlingofphysicalevidence,safety,andexplosions.NFPA907M,ManualfortheDeterminationofElectricalFireCauses,waswithdrawnasanindividualdocumentandwasintegratedwithrevisionsintothisdocumentasaseparatechapter.ElementsofNFPA907Mthatrelatetootherchaptersofthisdocumentwererelocatedappropriately.Newchaptersdealingwiththeinvestigationofmotorvehiclefires,managementofmajorinvestigations,incendiaryfires,andapplianceswereadded.Thethirdeditionofthedocumentincludesanewchapteronfuelgassystemsinbuildingsandtheimpactoffuelgasesonfireandexplosioninvestigations(Chapter19).Thechapteronelectricityandfire(Chapter14)wasrewrittentoimproveorganization,clarifyterminol-ogy,andaddreferences.Inthechapteronfirepatterns(Chapter4),severalsectionswererevised.OtherrevisionsweremadeinChapter9inthesubjectofpreservationofthefiresceneandphysicalevidence.Thiseditionalsoincludesnewtextregardingignitibleliquiddetectioncanine/handlerteams.9212FIREANDEXPLOSIONINVESTIGATIONS1998EditionTechnicalCommitteeonFireInvestigationsDanielL.Churchward,ChairKodiakEnterprises,Inc.,INSERichardL.P.Custer,SecretaryCusterPowell,Inc.,MASEThomasW.Aurnhammer,FarmingtonFireDe
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