ASME B30.4-2020索道，起重机，井架，提升机，吊钩，千斤顶和吊索的门座起重机安全标准.pdf

Portal and Pedestal Cranes Safety Standard for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings AN AMERICAN NATIONAL STANDARD Portal and Pedestal Cranes Safety Standard for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings AN AMERICAN NATIONAL STANDARD A泪元、 ）€放SI t与~己J The American Society of U丘.）® Mechanical Engineers Two Pa『K Avenue • New y。rk, NY • 10016 USA Date 。f Issuance: Oct。ber 20, 2020 The nextediti。n of this St andard is scheduled for publication in 2025. This Standard wil l become effective 1yea r after the Date 。f Issuance . ASME issues written replies to inq uiries c。ncerni ng interpretations 。f t echrnical aspect s of this Standard. Interpretations are publi shed 。n the ASME webs ite under the Committee Pages at / as they are issued. Errata to codes and st andards may be posted on the ASME webs ite u nder t he c。mmittee Pages to provide c。rrect旧ns to incorrectly published items, or to correct typographica l or grammatical errors in codes and standards. Such errata shall be used 。n the date posted. The c。mmittee Pages can be found at /. There is an option available to automatically receive an e-mail notification when errata are post ed t o a particular code or standard. This option can be fou nd on t he appropr iate Committee Page aft er selecti ng “Errata” mt he Publicat旧n Information” section. ASME is the registered trademark of The Ame rican Society of Meet旧阳cal Engineers. Th is code or standard was developed under procedures accred ited as meeting t he criteria for American Nat ional Standards. n、eStandards Committeet hat approved t he code or standard was balanced to assure t hat individua ls from competent and concerned interests have had an 。pp。同unity to pa同i ci pate. The proposed c。de or standard