ThisStandardwasfirstissuedinAprilofl985andrevisedin2001.ThisStandardwasproposedbyandunderthejurisdictionoftheTechnicalCommitteeonStandardizationofMetalStructuresandHoistingDevicesofHydropowerStations.ThisStandardwasdraftedbytheCHECCNorthwestHydropowerInvestigationDesign&ResearchInstituteandtheCHECCKunmingHydropowerInvestigationDesign&Research Institute.TheparticipantindevelopmentofthisStandardalsoincludedtheCivilEngineeringCollegeofWuhanUniversity(formerlyknownastheCivilEngineeringCollegeofWuhanUniversityofWaterResourcesandElectricPower).