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ASME: American Society of Mechanical Engineers

ASME, the American Society of Mechanical Engineers, is a nonprofit membership organization that promotes the art, science, and practice of multidisciplinary engineering and allied sciences around the globe. It develops mechanical engineering standards regarding the proper design, construction, and testing of many mechanical devices, ensuring predictability in production and reliability in use. ASME is an ANSI accredited standards developer. It was founded in 1800 by a small group of leading industrialists and has grown to include more than 130,000 members in 151 countries. 32,000 of the members are students. Standards from ASME are available both individually, directly through the ANSI webstore, and as part of a Standards Subscription. If you or your organization are interested in easy, managed, online access to standards that can be shared, a Standards Subscription may be what you need - please contact us at: or 1-212-642-4980 or Request Proposal Price.

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ASME A17.1-2016

Safety Code for Elevators and Escalators

This Code is one of the numerous codes and standards developed and published by The American Society of Mechanical Engineers (ASME) under the general auspices of the American National Standards Institute, Inc. (ANSI).  The Code is intended to serve as the basis for the design construction, installation, operation, testing, inspection, maintenance, alteration, and repair of elevators, dumbwaiters, escalators, moving walks, and material lifts.  Safety codes and standards are intended to enhance public health and safety. Revisions result from committee consideration of factors such as technological advances, new data, and changing environmental and industry needs. Revisions do not imply that previous editions were inadequate.   This Code applies to new installations only, except Part 1, and Sections 5.10, 8.1, 8.6, 8.7, 8.8, 8.9, 8.10, and 8.11, which apply to both new and existing installations. Also, see ASME A17.3, Safety Code for Existing Elevators and Escalators, for further requirements.  The following conditions are not addressed in this Code: (a) assignment of the responsibility for compliance to any particular party.  (b) establishment of a frequency for periodic inspections and tests. See Nonmandatory Appendix N for recommended inspections and test intervals.  (c) assignment of responsibility for persons authorized to make and witness inspections and tests.

ASME B30.2-2016

Overhead and Gantry Cranes (Top Running Bridge, Single or Multiple Girder, Top Running Trolley Hoist)

B30.2 applies to the construction, installation, operation, inspection, and maintenance of hand-operated and power-driven overhead and gantry cranes that have a top-running single-girder or multiple-girder bridge, with one or more top-running trolley hoists used for vertical lifting and lowering of freely suspended, unguided loads consisting of equipment and materials. The requirements included in this Volume also apply to cranes having the same fundamental characteristics such as cantilever gantry cranes, semi-gantry cranes, and wall cranes. Requirements for a crane used for a special purpose such as, but not limited to, non-vertical lifting service, lifting a guided load, or lifting personnel are not included in this Volume.

ASME B30.20 / ASME BTH-1 - Below the Hook lifting Devices Package

ASME B30.20-2013 and ASME BTH-1-2017

The ASME B30.20 / ASME BTH-1 - Below the Hook lifting Devices Package provides the safety and design requirements for below the hook lifting devices. It is applicable to hoists, hooks, cableways, cranes, slings, derricks and jacks. ASME B30.20 / ASME BTH-1 - Below the Hook lifting Devices Package includes:

  • ASME B30.20-2018
  • ASME BTH-1-2017

ASME BTH-1-2017

Design of Below-the-Hook Lifting Devices

BTH-1 provides minimum structural and mechanical design and electrical component selection criteria for ASME B30.20 below-the-hook lifting devices. The provisions in this Standard apply to the design or modification of below-the-hook lifting devices. Compliance with requirements and criteria that may be unique to specialized industries and environments is outside of the scope of this Standard. Lifting devices designed to this Standard shall comply with ASME B30.20, Below-the-Hook Lifting Devices. B30.20 includes provisions that apply to the marking, construction, installation, inspection, testing, maintenance, and operation of below-the-hook lifting devices. BTH-1 addresses only design requirements. As such, this Standard should be used in conjunction with B30.20, which addresses safety requirements. BTH-1 does not replace B30.20. The design criteria set forth are minimum requirements that may be increased at the discretion of the lifting device manufacturer or a qualified person.

ASME B30.20-2013

Below-the-Hook Lifting Devices

ASME B30.20 addresses structural and mechanical lifting devices, vacuum lifting devices, operated close proximity lifting magnets, remotely operated lifting magnets, and scrap and material handling grapples. It offers comprehensive solutions applying to the marking, construction, installation, inspection, testing, maintenance, and operation of equipment used for attaching loads to a hoist.  Key changes to this revision of B30.20 include:  Adds requirements for personnel competence, operating controls marking and inspection, plus responsibilities for Owners and Operators for each piece of equipment Addresses translation of non-English documentation into English Revised definitions to align with BTH-1. ASME BTH-1 is the equipment design standard companion to B30.20. Specifically, BTH-1 provides minimum structural and mechanical design and electrical component selection criteria for B30.20 below-the-hook lifting devices.   B30.20 and BTH-1 are to be used in conjunction with equipment described in other volumes of the ASME B30 series of Safety Standards. Careful application of these Safety Standards will help users to comply with applicable regulations within their jurisdictions, while achieving the operational and safety benefits to be gained from the many industry best-practices detailed in these volumes.


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