ladder safety - united states mine rescue association：梯子安全-美国矿山救援协会

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1、ThisguideprovidescomplianceinformationtohelpthemetalandnonmetalminingindustrycomplywiththerequirementsoftheMineSafetyandHealthAdministration’s(MSHA’s)ladderstandards.Thisdocumentisintendedtoenhanceawarenessofladdersafetyforminers,mineoperators,miners’representa

2、tives,independentcontractorsandMSHA’sMetalandNonmetalenforcementpersonnel.Thefollowingsymboldenotesagenerallycompliantcondition:Thefollowingsymboldenotesagenerallynoncompliantcondition:1OKMostoftheslidesinthispresentationhaveexplanatorynotesthatarecriticaltound

3、erstandingthecontent.IfusingthePowerPoint®version,besuretoadjustthedisplayonyourcomputerscreentobeabletoreadthenotes,orprinttheslidesusingthe“NotesPages”option.IfusingthePDFversion,thenotescanbereadbyhoveringyourcursoroverorclickingontheorangeiconintheupperleft

4、corneroftheslide.NavigatingthisPresentation2LadderSafetyStandardsMetalandNonmetalMineSafetyandHealthTableofContents-1Definitionandcategoriesofladders6Constructionandmaintenance8Maintenance12Maintenancevs.SafeAccess16Woodenladders17Fixedladders18Anchorage&toecle

5、arance19Landings&handholds20Ladderinclination22Railedlandings&backguards23Protectionfortravelwayopenings26Portableladders29Ladderbases&placedsecurely33Useofladders364TableofContents-2Specialladders37Mobileequipmentladders38Alternatingtreadladders41Dual-sidedlad

6、ders42Scaffoldladders44Undergroundladders&travelways46Trapdoorsandguarding47Ladderwayopeningdimensions49Steeptravelways50Landings51Inclinedescapeways52Ladderusesafety54Ladder-relatedfatalities56FrequentlyAskedQuestions(FAQs)585LaddersMSHA’sstandardsdonotdefinea

7、ladder.MSHAacceptsthecommondictionarydefinitionofaladder.MSHA’sstandardscategorizeladdersaseitherfixedorportable.Someladdersalsohaveadditionaldescriptivedesignationsbasedupontheirspecialuseordesign.6CategoriesofLaddersFixedLaddersExtensionLaddersStepLaddersFixe

8、dladders–arenotdefinedinMNMstandards.Theyarepermanentlyattachedtobuildings,structuresorequipmentPortableladders–notfixed(extension,step)►Specialladders–fixedorportable,unusu