IMPORTANTNOTICES AND DISClAIMERSCONCERNINGNFPA®STANDARDSNOTICEANDDISClAIMEROFLIABILITYCON CERNINGTHEUSEOFNFPASTA亚 ARDS NFPA ®codes,standards,recommendedpractices,andguides("NFPAStandards"),ofwhichthedocument containedhereinis one, are developedthrougha consensus standards development process approved by th eAmerican Na tionalStandards Institute. T his process brings toge the r volun teers representing varied vie wpoin tsand intereststoachieveconsensusonfireandothersaf虹y issues. WhiletheNFPAad minis ters the process andestablishesrules co promote fairness inthedevelopment of consensus, it does notin d e pe ndentlytest, evaluate, orverifytheaccuracyofanyinfonna 沁northesoundnessofanyjudgmentscontainedinNFPAStandards. TheNFPAdisclaimsliabil屯' foranypersonalinjury,property,orocherdamagesofanynaturewhatsoever, whetherspecial,indirect,consequentialorcompensatory,directlyorindirectlyresultingfromthepublication,useof,orrelianceonNF PAStandards.TheNFPAalsomakesnoguarantyorwarrantyastotheaccuracyor completenessofanyinformationpublishedherein. Inissuingand makingNFPAStandardsavailable , theNFPAisnocundertakingtorenderprofessionalorotherservices foror onbehalf of any personor entity.Noris theNFPAu ndertakingtopert·orm anyduty owed by a nyperson or entity to someone else. Anyone using 如s document should rely onhis or her own in d e pe ndentjudgment or, as appropriate, seek the advice of a competent professional in d e terminingthe e xercise ofreasonablecareinanygivencircumstances. TheNFPAhas nopower, no rdoes it undertake,to police or enforce complia n cewithche contents of NFPAStandards. Nor does theNFPA list, certify, test, or inspect products, designs, or in s ta llations for compliance with伽s document. Any certificatio n or ocher statement of compliance withtherequirements of this d o c u mentshallnotbeattributabletotheNFPAandissolelytheresponsibility ofthecertifierormakerofthestatement. REVISIONSYMBOISIDENTIFYINGCHANGESFROMTHEPREVIOUSEDITION Textrevisionsareshaded. Aabeforea sectionnumberindicateschatwordsi 叽 hinthat section weredeletedandaatotheleftofatableorfigurenumberindicatesarevisiontoanexistingtableor figure. vVhenacha p terwas heavilyrevised,theentire chapter ismarkedthroughout withtheasymbol.vVhereoneormore sectionsweredeleted, a•isplacedbetweentheremaining sections.Chapters,annexes,sections,什gures,and tablesthatare newareindicatedwithanN. Notethattheseindicatorsare aguide.Rearrangementofsectionsmaynotbecapturedinthe markup, butuserscanviewcompleterevisiondecailsintheFirstand SecondDraftReportslocatedinthe archived revision in fonnationsection of each code at www.nfp a.org/ docinfo. Any subsequentchanges fromtheNFPATechnicalMeeting, Ten 也tiveInterimAmendments, andErrataarealso locatedthere. REMINDER:UPDATINGOFNFPASTANDARDS Users ofNFPA codes, standards,recommendedpractices,andguides("NFPA Standards")should beawarethatNFPAStandardsmaybean1endedfromtimetotimethroughtheissuance ofaTentative InterimAmendment(TIA)orcorrectedbyErraca.Anofficial NFPAStandardatanypointintimeconsistsofthecurrenteditionofthedocumenttogetherwithanyTIAsandErratat henineffect. To detenninewh e the r anNFPA Standardhas beenamendedthroughtheissua n ceofTen ta tiveInterimAmendmentsorcorrectedbyErrata, gotowww.nfpa.org / docinfotochoosefromthelisto、t NFPAS 也ndardsorusethesearchfeaturetoselecttheNFPAStandardnumber (e.g., NFPA13 ) . Thedocumentinformationpagepro,desup-to-datedocument-specificinf、ormationaswell as postings ofallexistingTlAsand Erra 也 .Italsoin cludestheoptionto register for an "Ale rt" featureto receive anautomatic e mailnotificationwhennew updatesandother informationareposted regarding thedocument. ISBN:978-145591902-4(PDF) ISBN:978-145591903-1(eBook