ASME B30 11 INTERPRETATIONS-2009 Interpretations to B30 11 - 1998 Monorails and Underhung Cranes (Includes Interpretations April 1995 thru August 2009)《B30 11-1998的说明 单轨悬挂式起重机》.pdf

1、ASME B30.11 INTERPRETATIONSASME B30.11 INTERPRETATIONSReplies to Technical InquiriesMay 2004 through August 2009FOREWORDThis publication includes all of the written replies issued between the indicated dates by theSecretary, speaking for the ASME B30 Standards Committee, Safety Standards for Cablewa

2、ys,Cranes, Derricks, Hoists, Hooks, Jacks, and Slings, to inquiries concerning interpretations oftechnical aspects of ASME B30.11, Monorails and Underhung Cranes.These replies are taken verbatim from the original letters except for a few typographicalcorrections and some minor editorial corrections

3、made for the purpose of improved clarity. Insome few instances, a review of the interpretation revealed a need for corrections of a technicalnature; in these cases, a corrected interpretation follows immediately after the original reply.These interpretations were prepared in accordance with the accr

4、edited ASME procedures.ASME procedures provide for reconsideration of these interpretations when or if additionalinformation is available that the inquirer believes might affect the interpretation. Furthermore,persons aggrieved by this interpretation may appeal to the cognizant ASME Committee orSubc

5、ommittee. ASME does not “approve,” “certify,” “rate,” or “endorse” any item, construction,proprietary device, or activity.I-1ASME B30.11 INTERPRETATIONSInterpretation: 11-18Subject: ASME B30.11-2004Date Issued: September 26, 2005Background: The following statement appears in para. 2-1.14.3 of ASME B

6、30.2, para. 11-3.2.3of ASME B30.11, and para. 16-1.2.6 of ASME B30.16:“No less than two wraps of rope shall remain on the drum at each anchorage of the hoist(ing)drum when the hook is in its extreme low position unless a lower-limit device is provided, inwhich case no less than one wrap shall remain

7、.”Question (1): When the hook is in its “extreme low position,” does this mean that the hook isat its lowest point of travel when all of the rope has been unwound, except for the requiredwraps?Reply (1): Yes.Question (2): When the hook is in its “extreme low position,” does this mean that the hookmu

8、st be capable of traveling all the way to the ground with no load?Reply (2): No.I-2ASME B30.11 INTERPRETATIONSInterpretation: 11-19Subject: ASME B30.11-1998, Monorails and Underhung CranesDate Issued: September 26, 2005Question (1): Could you provide clarification and opinion to para. 11-3.1.5(a) of

9、 ASME B30.11?We need to better understand what “divert attention while engaged in operating the equipment”means.Reply (1): Commonly used terminology is not specifically defined in B30.11; however, it is theB30.11 Subcommittees opinion that it is commonly acceptable for crane operators to be engagedi

10、ntheactivities ofattachingtheloadtothe hookandhandlingtheload. Oftentimestheseactivitiesmight require the operator to let go of the pendant and set it aside within easy reach as varioustasks are performed by the crane operator during the load handling operation process. Therefore,we do not think act

11、ivities related to handling the load will divert the attention of the craneoperator and compromise safe crane operation.Question (2): Could you provide clarification for the term “unattended” as described inpara. 11-3.2.5(a) of ASME B30.11? Does it mean that the pendant control must be in the operat

12、orspossession 100% of the time, or within arms reach, or within eyeshot?Reply (2): Since the B30.11 Volume does not cover a definition for “unattended,” we refer toB30.16-2003, Overhead Hoists (Underhung) and B30.2-1996, Top Running, Bridge, Single orMultiple Girder, Top Running Trolley Hoist for a

13、clarification of the term “unattended.”ASME B30.16-2003, Section 16-0.2 Definitions, defines “unattended” as follows:“unattended: a condition in which the operator of a hoist is not at the operating control devices(pendant station or hand chain). If, however, the control devices are within an unobst

14、ructeddistance of 26 ft (8.0 m) and within sightof the operator, the hoist should be considered attended.”ASME B30.2-1996, Section 2-0.2: Definitions, defines “unattended” as follows:“unattended: acondition inwhich theoperator of acrane isnot atthe operatingcontrol devices.However, on a floor-operat

15、ed crane, if the operating control devices are within sight of theoperator and within a distance equal to the span of the crane, the crane should be consideredattended.”I-3ASME B30.11 INTERPRETATIONSInterpretation: 11-20Subject: ASME B30.11-2004, Monorails and Underhung Cranes, Section 11-1.1Date Is

16、sued: September 29, 2008Question (1): Does the monorail beam itself require a capacity marking? If it is required, is itrequired regardless of the number of hoists or the type of trolley (manual vs. powered)?Reply (1): No.Question (2): Is it assumed the monorail beam capacity is that of the hoist wh

17、en only one hoistis installed on the beam and as such explicit marking of the beam capacity is not required (similarto the requirements set forth in para. 11-1.1.1 for cranes)?Reply (2): No, the capacity of the beam shall not be assumed.Question (3): Is the capacity required to be explicitly marked

18、on the beam when two or morehoists are installed on the same monorail beam?Reply (3): No.I-4ASME 630.1 1 INTERPRETATIONS Replies to Technical Inquiries April 1995-March 1999 FOREWORD This publication includes all of the written replies issued between the indicated dates by the Secretary, speaking fo

19、r the ASME B30 Committee, Safety Standards for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings, to inquiries concerning interpretations of technical aspects of ASME B30.11, Monorails and Underhung Cranes. These replies are taken verbatim from the original letters except for a few typog

20、raphical corrections and some minor editorial corrections made for the purpose of improved clarity. In some few instances, a review of the interpretation revealed a need for corrections of a technical nature: in these cases a corrected inter- pretation immediately follows the original reply. These i

21、nterpretaions were prepared in accordance with the accredited ASME procedures. ASME proce- dures provide for reconsideration of these interpretations when or if additional information is available which the inquirer believes might affect the interpretation. Further, persons aggrieved by this interpr

22、etation may appeal to the cognizant ASME Committee or Subcommittee. ASME does not “approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device or activity. 1 ASME 830.11 Interpretations 11-12 Interpretation: 11-12 Subject: ASME B30.11-1993, Monorails and Underhung Cranes Dat

23、e Issued: March 13, 1998 Question (1): Paragraph 11-1.3.2(f) states: “All track and track supports built after the issuance of this Standard should conform to the minimum design parameters as specified in the Manual of Steel Construction of ANSI MH27.1.” Can the AISC Manual of Steel Construction be

24、used alone to design track and track supports? Reply (1): No. Question (2): Are both standards to be used with the most restrictive requirements from each apply- ing to the design of track and track supports? Reply (2): No.lThe method and design basis to design track and track supports m dependent upon the monorail type being considered. The determination of the appropriate standard or specification to use as a design basis is the responsibility of the system designer, Therefore, the word “should” is used in para. 11-1.3.2(f). 3