1、ASME B30.8 INTERPRETATIONSASME B30.8 INTERPRETATIONSReplies to Technical InquiriesOctober 2014FOREWORDThis publication includes all of the written replies issued between the indicated dates by theSecretary, speaking for the ASME B30 Standards Committee, Safety Standards for Cableways,Cranes, Derrick
2、s, Hoists, Hooks, Jacks, and Slings, to inquiries concerning interpretations oftechnical aspects of ASME B30.8, Floating Cranes and Floating Derricks.These replies are taken verbatim from the original letters except for a few typographicalcorrections and some minor editorial corrections made for the
3、 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 accredited ASME
4、procedures.ASME procedures provide for reconsideration of these interpretations when or if additionalinformation is available that the inquirer believes might affect the interpretation. Further, personsaggrieved by this interpretation may appeal to the cognizant ASME Committee or Subcommittee.ASME d
5、oes not “approve,” “certify,” “rate,” or “endorse” any item, construction, proprietarydevice, or activity.I-1ASME B30.8 INTERPRETATIONSInterpretation: 8-9Subject: ASME B30.8-2010, Para. 8-1.2.2, Operation CriteriaDate Issued: October 20, 2014Question (1): Are the criteria in para. 8-1.2.2 provided s
6、trictly for the purpose of establishinglimits for list and trim?Reply (1): Yes, the criteria in para. 8-1.2.2(a) are provided for the purpose of establishing limitsfor list and trim.Question (2): Are the criteria in para. 8-1.2.2 intended to imply that the crane itself is requiredto withstand in-ser
7、vice or is permitted to operate in these environmental conditions?Reply (2): No, for operating practices refer to section 8-3.2.Question (3): It is anticipated that de-rated load charts for 40 mph and 60 mph wind can bedeveloped, but is a load chart for 20 mph maximum wind permitted?Reply (3): The V
8、olume does not address which load charts should be developed.Question(4):Isaboomrequiredtowithstandthe90mphwindconditioninpara.8-1.2.2(b)(1)(d)if operating procedures do not allow this condition to occur?Reply (4): Yes.Question (5): Para. 8-1.2.2(b)(1)(d) says: “for backward stability of the boom: h
9、igh boom, noload, full back list (least stable condition), 90 mph (142 km/h) wind.” A crane boom in thissituation is stable in terms of equilibrium but may also be highly overstressed or even collapsebackwards over the boom stops. Please explain or define what is meant by the word “stable.”Reply (5)
10、: Refer to the standard dictionary definition of the word.I-2STD-ASME B30.8 INT-ENGL m 0757b70 0589b77 T77 m ASME B30.8 Interpretations Replies to Technical Inquiries December 1989 - December 1995 FOREWORD This publication includes all of the written replies issued between the indicated dates by the
11、 Secretary, speaking for the ASME B30 Committee, Safety Standards for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings, to inquiries concerning interpretations of technical aspects of B30.8, Floating Cranes and Floating Demcks. These replies are taken verbatim from the original letters
12、except for a few typographical 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 interpretation follows immediately after t
13、he original reply. These interpretations were prepared in accordance with the accredited ASME procedures. ASME procedures provide for reconsideration of these interpretations when or if additional information is available which the inquirer believes might affect the interpretation. Further, persons
14、aggrieved by this interpretation may appeal to the cognizant ASME Committee or Subcommittee. ASME does not “approve,” “certify,” “rate” or “endorse” any item, construction, proprietary device, or activity. 35 830.8 Interpretations Interpretation: 8-8 Subject: ASME B30.8-1993 Date Issued: December 12
15、, 1995 Question (I): For the purpose of designing the cranelbarge unit, are the operating list and trim (a) the loads given in the crane manufacturers load chart ratings for marine service (including de- (b) the conditions given in para. 8-1.2.2(b)? Reply (1): Both (a) and (b) apply, but initial des
16、ign must begin with the crane manufacturers load chart ratings, then size the barge to meet the requirements of (a) and (b) with that crane mounted on the barge under specified conditions. The first part of your question, (a), is an operating condition that specifies the maximum allowable list and t
17、rim of the barge with the crane operating at the capacities allowed by the crane manufacturer. The second part of your question, (b), is a design loading condition for a crane or derrick designed for barge mounting that requires the crane to be stable under the various specified conditions. Operatio
18、n under these conditions depends on both the limitations of the crane as specified by the crane manufacturer and the barge manufacturer; however, the operating list and trim limitations shall not exceed the crane manufacturers load chart. limitations in para. 8-1.2.2(a) applied using: rate for machi
19、ne list); or Question (2): How is machine list incorporated into stability analysis? Reply (2): The classical naval architects approach to designing adequate stability begins with the premise that there will be increasing positive righting arms throughout the range of operation. 8-8 43 ASME B30.8-19
20、93 Interpretations Replies to Technical Inquiries December 1989 - March 1995 FOREWORD This publication includes all of the written replies issued between the indicated dates by the Secretary, speaking for the ASME B30 Committee, Safety Standards for Cableways, Cranes, Der- ricks, Hoists, Hooks, Jack
21、s, and Slings, to inquiries concerning interpretations of technical aspects of B30.8, Floating Cranes and Floating Derricks. These replies are taken verbatim from the original letters except for a few typographical correc- tions and some minor editorial corrections made for the purpose of improved c
22、larity. In some few instances, a review of the interpretation revealed a need for corrections of a technical nature: in these cases a corrected interpretation follows immediately after the original reply. These interpretations were prepared in accordance with the accredited ASME procedures. ASME pro
23、cedures 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 interpretation may appeal to the cognizant ASME Committee or Subcommittee. ASME does not “approv
24、e,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity. 35 m 0759670 0568734 TT8 m ASME B30.8-1993 Interpretations Interpretation: 8-5 a-5 Subject: ASMEf ANSI B30.8-1988 Date Issued: September 22, 1994 Question (1): In the event that a crawler crane working on a
25、barge cannot be tied down because of the operation, but the crane is blocked (as in stop log), could that also mean secured? Reply (1): No. The crawler crane is blocked with a stop log only when the stop log engages the tracks to prevent movement fore and aft. Securing is accomplished by tie-downs o
26、r other means to prevent shifting or uplifting. Question (2): If a marine engineer calculates maximum working loads for a land-based crane within the perimeter of a specified working radius on a barge to include machine list, barge list, trim, wave action and wind, and certifies those calculations,
27、could that be considered secured? Reply (2): No. Securing is accomplished by tie-downs or other methods of physically preventing the shifting or uplifting of the crane. Question (3): Could a contractor utilizing a crawler crane on a barge using a combination of stop logs and calculations described a
28、bove meet the definition of “blocked and secured”? Reply (3): No. Although the term “blocked and secured” is not defined in the volume, the intent of para. 8-1.2.2(b)(2)(e) is to place a land crane in a location on the barge or pontoon that has been established with consideration of the “modified ra
29、ting” for lifting and be physically blocked to prevent fore and aft or lateral movement. Likewise, the crane should be secured by tie-downs or other means to prevent shifting or uplifting. To block and secure is to physically secure the crane in position to prevent movement during lifting. Interpret
30、ation: 8-6 Subject: ASME B30.8- 1993 Date Issued: December 20, 1994 Question (1): Exactly how do you interpret the term “seagoing barges or pontoons”? Reply (I): The B30.8 volume does not have a definition of “seagoing barge or pontoon.” For your information, the U.S. Coast Guard uses the following
31、definition: “Means a nonself-propelled vessel of at least 100 gross tons making voyages beyond the boundary line.” Question (2): Does para. 8-1.3.2(a) apply to seagoing barges or inland barges? Reply (2): Para. 8-1.3.2(a) applies only to seagoing barges and pontoons. 41 m 0759670 0568735 934 m 8-6R
32、ASME 630.8-1993 Interpretations Interpretation: 8-6R Subject: ASME B30.8-1993 Date Issued: March 16, 1995 Question (1): Exactly how do you interpret the term “seagoing barges or pontoons”? Reply (1): As stated previously, the B30.8 volume does not have a definition of “seagoing barge or pontoon.” Th
33、e definition supplied by the U.S. Coast Guard, who issues the load line certificate for towing beyond the boundary line, is applicable: “Means a nonself-propelled vessel of at least 100 gross tons making voyages beyond the boundary line.” To further clarify the matter, a seagoing barge must be class
34、ed “Maltese Cross A-1” to voyage beyond the boundary line established by the Coast Guard. Also, the load line criteria for interna- tional unmanned voyage (towing) applies to the floating crane in its towing configuration. Question (2): Is there a distinction between inland and offshore barges? Repl
35、y (2): The distinction between inland barges and seagoing barges, simply put, is that a barge not meeting criteria of Reply (1) cannot voyage beyond the boundary line, and, therefore, is not a seagoing barge. Question (3): What is the rationale for requiring “enough watertight compartments for stabi
36、l- ity,” in para. 8-1.3.2(a)? Reply (3): The rationale for enough watertight compartments is to prevent capsizing or sinking when any two compartments are flooded and the boom stowed and fully loaded with design deck load while making a voyage beyond the boundary line (on the open sea). Additionally
37、, this require- ment is not intended to be applicable to barges with less than 100 gross tons capacity or those that remain inside the established boundary. The concept being that, the safety of a floating crane or floating derrick under tow beyond the established boundary line, is the measure of da
38、mage the barge may encounter and survive. Interpretation: 8-7 Subject: ANSI B30.8-1971 and ASME B30.8-1993 Date Issued: March 16, 1995 Question: What is the rationale for having a supervisor in charge of heavy-lifting operations in Section 8-3.1.3(c) of ASME B30.8-1993 as compared to the requirement
39、 found in Section 8-3.2.3(d) of ANSI B30.8-1971? Reply: Section 8-3.2.3(d) of ANSI B30.8-1971 reads: “The operator shall be responsible for those operations under his direct control. Whenever there is any doubt as to safety, the operator shall have the authority to stop and refuse to handle loads un
40、til safety has been assured.” Section 8-3.1.3(c) of ASME B30.8-1993 reads essentially the same: “Each operator shall be held responsible for those operations under the operators direct control. Whenever there is any doubt as to safety, the operator shall consult with the supervisor before handling t
41、he loads.” The current wording of B30.8 was developed to include the responsibility of management in maintaining a safe work environment. 42 ASME B30.8-1993 Interpretations Replies to Technical inquiries December 1989 - March 1993 FOREWORD This publication includes all of the written replies issued
42、between the indicated dates by the Secretary, speaking for the ASME B30 Committee, Safety Standards for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings, to inquiries concerning interpretations of technical aspects of B30.8, Floating Cranes and Floating Denicks. These replies are taken
43、verbatim from the original letters except for a few typographical 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 interpr
44、etation follows immediately after the original reply. These interpretations were prepared in accordance with the accredited ASME procedures. ASME pro- cedures provide for reconsideration of these interpretations when or if additional information is available which the inquirer believes might affect
45、the interpretation. Further, persons aggrieved by this interpretation may appeal to the cognizant ASME Committee or Subcommittee. ASME does not “approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity. 35 ASME 830.8 93 W 0759670 0535813 788 W 830.8-1 993 Int
46、erpretations 8-3 Interpretation: 8-3 Subject: ASMEJANSI B30.8-1988 Date Issued: March 1 I, 1993 Question: Does paras. 8-1.2.2(a)(l) and 8-1.2.2(b)(l) apply to the crane (or demck) only or do they apply to the barge with the crane as a complete system? Reply: Sections 8-1.2.2(a)(l) and 8-1.2.2(b)(l)
47、of B30.8-1988 applies to the crane and barge as a complete system or unit. Section 8-1.2.2 applies only to stability and therefore considers the crane struc- turally integral with the barge or pontoon in accordance with Section 8-1.2.1, Structural Competence. 37 0759670 0544753 494 m ASME B30.8-1993
48、 Interpretations Replies to Technical Inquiries January 1990 - June 1993 FOREWORD This publication includes all of the written replies issued between the indicated dates by the Secretary, speaking for the ASME B30 Committee, Safety Standards for Cableways, Cranes, Der- ricks, Hoists, Hooks, Jacks, a
49、nd Slings, to inquiries concerning interpretations of technical aspects of B30.8, Floating Cranes and Floating Derricks. These replies are taken verbatim from the original letters except for a few typographical correc- tions 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 interpretation follows immediately after the original reply. These interpretations were prepared in accordance with the accredited ASME procedures. ASM
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