资源描述：
《A156.21-1996 Thresholds》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、ANSWHMAAl56.2l-1996Revisionof:ANSI/E#HMAAl!%.Zl-1989AMERICANNATIONALSTANDARDFORTHRESHOLDSSPONSORBUILDERSHARDWAREMANUFACTURERSASSOCIATION,INCApproved14March1996AMERICANNATIONALSTANDARDSINSTITUTE,INCAMERICANNATIONALSTANDARDAnAmericanNationalStandardimpliesaconsensusofthosesubstan
2、tiallyconcernedwithitsscopeandprovisions.AnAmericanNationalStandardisintendedasaguidetoaidthemanufacturer,theconsumerandthegeneralpublic.TheexistenceofanAmericanNationalStandarddoesnotinanyrespectprecludeanyone,whetherhehasapprovedtheStandardornot,frommanufacturing,marketing,pu
3、rchasingorusingproducts,processes,orproceduresnotconformingtotheStandard.AmericanNationalStandardsaresubjecttoperiodicreviewandusersarecautionedtoobtainthelatesteditions.CAUTIONNOTICE:ThisAmericanNationalStandardmayberevisedorwithdrawnatanytime.TheproceduresoftheAmericanNationa
4、lStandardsInstituterequirethatactionbetakentoreaffirm,revise,orwithdrawthisStandardnolaterthanfiveyearsfromthedateofpublication.PurchasersofAmericanNationalStandardsmayreceivecurrentinformationonallStandardsbycallingorwritingTheAmericanNationalStandardsInstitute.PublishedbyBUIL
5、DERSHARDWAREMANUFACTURERSASSOCIATION,INC.355LexingtonAvenueNewYork,NewYork10017Copyright01996bytheBuildersHardwareManufacturersAssociation,Inc.NottobereproducedwithoutspecificauthorizationfromBHMAPrintedintheUSAThisStandardwasdevelopedbytheBuildersHardwareManufacturersAssociati
6、on,Inc.ItwasapprovedbyANSIundertheCanvassMethod.BHMAwasaccreditedon21March1983asasponsorusingtheCanvassMethod.FOREWORD(ThisForewordisnotapartofANSI/BHMAA156.21)Thegeneralclassificationofbuildershardwareincludesawidevarietyofitemswhicharedividedintoseveralcategories.Torecognizet
7、hisdiversity,asectionalclassificationsystemhasbeenestablished.ArchitecturalDoorTrimisonesuchsectionandthisStandardistheresultofthecollectiveeffortsofmembersoftheBuildersHardwareManufacturersAssociation,Inc.whomanufacturetheseproducts.ThetotalProductStandardseffortis,therefore,a
8、collectionofsections,eachcoveringaspecificcategoryofit
