ASME-BTH June 5, | Author: Nanang Komarudin | Category: Strength Of Materials, Engineering, Mechanical Engineering, Science, Nature. Buy ASME BTH 1: DESIGN OF BELOW-THE-HOOK LIFTING DEVICES from SAI Global. ASME BTH Design Of Below-The-Hook Lifting Devices. Be notified when this Standard is updated or amended – Add to StandardsWatch. General.
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We are a non-profit group that run this website to share documents. We need your help to maintenance this website. Please help us to share our service with your friends. The correct equation is shown below. October 29, The next edition of this Standard is scheduled for publication in This Standard will become effective 1 year after the Date of Issuance.
ASME issues written replies to inquiries concerning interpretations of technical aspects of this Standard. Interpretations may be accessed as they are issued at http: Errata to codes and standards may be posted on the ASME Web site under the Committee Pages to provide bth-1-2104 to incorrectly published items, or to correct typographical or grammatical errors in codes and standards.
Such errata shall be used on the date posted. The Committee Pages can be asem at http: There is an option available to automatically receive bth–2014 e-mail notification when errata are posted to a particular code or standard.
This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The Standards Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate.
The proposed code or standard was made available for public review and comment that provides an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large. ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable letters patent, nor assumes any such liability.
Users of a code or standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility.
Participation by federal agency representative s or person s affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard.
ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME procedures and policies, which precludes the issuance of interpretations by individuals. No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. New btj-1-2014 Existing Devices. Vacuum Lifting Device Design. Electric Motors and Brakes. Controllers and Auxiliary Equipment.
Illustration of Holding and Ame Forces. Minimum Sizes of Fillet Welds. Allowable Stress Ranges, ksi MPa. Fatigue Vth-1-2014 Amplification Factors. Scope, Definitions, and References. As a consequence, industry has for quite some time expressed a need for a comprehensive design standard for below-the-hook lifting devices that would complement the safety requirements of ASME B However, members of the construction community expressed the need for design criteria more suitable to their operating conditions, including a lower design factor, and the necessity to address other failure modes such as fracture, shear and buckling, and design topics such as impact and fasteners.
This Standard, intended for general industry and construction, sets forth two design categories for lifters based on the magnitude and variation of loading, and operating and environmental conditions. The two design categories provide different design factors for determining allowable static stress limits. Five Service Classes based on load cycles are provided.
The Service Class establishes allowable stress range values for lifter structural members and design parameters for mechanical components. ASME BTH-1— incorporated editorial revisions and two new mechanical design sections for grip ratio and vacuum-lifting device design.
ASME BTH-1— incorporated revisions throughout the Standard and the addition of a new mechanical design section for fluid power systems. Other technical revisions include new requirements for fluid pressure control and electrical system guarding.
Along with these technical changes, the nonmandatory Commentary for each chapter was moved to its own respective Nonmandatory Appendix. Duerr, Vice Chair M.
Barton, Doc Magnet G. Boyd, The Boeing Co. Duerr, 2DM Associates, Inc. Faris, Ibberson Engineering Co. Jankowski, Walker Magnetics T.
McCabe, Babcock and Wilcox Co. Rebbin, Bradley Lifting Corp. Rea, Alternate, Bradley Lifting Corp. Van Every, Tecnomagnete, Inc. Verenski, Hunter Lift Ltd.
Brookbank, Alternate, Hunter Lift Ltd. Dahlin, Walker Magnetics J. ASME Standards are developed and maintained with the intent to represent the consensus of concerned interests. As such, users of this Standard may interact with the Committee by requesting interpretations, proposing revisions, and attending Committee meetings. Correspondence should be addressed to: Revisions are made periodically to the Standard to incorporate changes that appear necessary or desirable, as demonstrated by the experience gained from the application of the Standard.
Approved revisions will be published periodically. The Committee welcomes proposals for revisions to this Standard. Such proposals should be as specific as bth-12014, citing the paragraph number sthe proposed wording, bgh-1-2014 a detailed description of the reasons for the proposal, including any pertinent documentation. Interpretations can only be rendered in response to a written request sent to the Secretary bth–1-2014 the BTH Standards Committee at go.
The request for an interpretation should be clear and unambiguous. Cite the applicable paragraph number s and the topic of the inquiry. Cite the applicable edition of the Standard for which the interpretation is being requested. Phrase the question as a request for an interpretation of a specific requirement suitable for general understanding and use, not as a request for an approval of a proprietary design or situation.
The inquirer may also include any plans or drawings that are necessary to explain the question; however, they should not contain proprietary names or information. Requests that are not in this format may be rewritten in the appropriate format by the Committee prior to being answered, which may inadvertently change the intent of the original request.
ASME procedures provide for reconsideration of any interpretation when or if additional information that might affect an interpretation is available. Future Committee meeting dates and locations can be found on the Committee Page at http: Page Location Change 1 Second sentence of last paragraph revised 2, 3 This Standard serves as a guide to designers, manufacturers, purchasers, and users of below-the-hook lifting devices. Values are given in U. Customary units as the primary units followed by the International System of Units SI in parentheses as the secondary units.
The values stated in U. Customary units are to be regarded as the standard. The SI units in the text have been directly softly converted from U.
This Btj-1-2014 provides minimum structural amse mechanical design and electrical component selection criteria for ASME B The provisions in this Standard apply to the xsme or modification of below-the-hook lifting devices.
Compliance with requirements and criteria that may be unique to specialized industries and environments is outside the scope of this Standard. The provisions defined in this Standard address the most common and broadly applicable aspects of the design of below-the-hook lifting devices.
Resolution of loads into forces and stress values affecting structural members, mechanical components, and connections shall be performed by an accepted analysis method. The analysis techniques and models used by the qualified person shall accurately represent the loads, material properties, and device geometry; stress values resulting from the analysis shall asje of suitable form to permit correlation with the allowable stresses defined in this Standard.
Lifting devices manufactured bth-1-20014 the effective date shall conform to the requirements of this Standard. When a lifter is being modified, its design shall be reviewed relative to this Standard, and the need to meet this Standard shall be evaluated by the manufacturer or a qualified person.
Other materials may be used, provided the margins of safety and fatigue life are equal to or greater than those required by this Standard. The design strength of welds shall be as defined in para. When conflicts exist between AWS D Welding of lifters fabricated from metals other than steel shall be performed in accordance with a suitable welding specification as determined by a qualified person, provided the quality and inspection requirements are equal to or greater than those required by this Standard.
When the temperature of the component is beyond these limits, special additional design considerations may be required. These considerations aeme include choosing a material that has better cold-temperature or hightemperature properties, limiting the design stresses to a lower percentage of the allowable stresses, or restricting use of the lifter until the component temperature falls within the stated limits.
Lifters expected to operate in ambient temperatures beyond this limit shall have electrical components designed for the higher ambient temperature.
The paragraph given after the definition of wsme term refers to the paragraph where the term is first used. The device may contain components such as slings, hooks, and rigging hardware that are addressed by ASME B30 volumes or other standards section Tension stress same considered to have the opposite algebraic sign from compression stress para.
The term applies to both hydraulics, which uses a pressurized liquid such as oil or water, and pneumatics, which uses compressed air or other gases section Because of its slight movement, it is not termed a running sheave para. Each symbol is defined where it is first used. Some symbols may have different definitions within this Standard. For rolled shapes, this value may be taken as the clear distance between flanges less the fillet or corner radius, in.