1、AN AMERICAN NATIONAL STANDARDSafety Requirements for Powered Platforms and Traveling Ladders and Gantries for Building MaintenanceASME A120.1-2008(Revision of ASME A120.1-2006)ASME A120.1-2008(Revision of ASME A120.1-2006)Safety Requirementsfor Powered Platformsand Traveling Laddersand Gantries forB
2、uilding MaintenanceAN AMERICAN NATIONAL STANDARDDate of Issuance: September 5, 2008The next edition of this Standard is scheduled for publication in 2011. There will be no addendaissued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisSt
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4、 American NationalStandards. The Standards Committee that approved the code or standard was balanced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate. The proposed code or standard was madeavailable for public review and comment that provides an
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8、responsibility for only those interpretations of this document issued in accordance with the establishedASME 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,w
9、ithout the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue, New York, NY 10016-5990Copyright 2008 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster vCorrespondence With the A12
10、0 Committee . viSummary of Changes vii1 General Recommendations and Definitions 12 Building Design Requirements . 53 Equipment Design and Construction Requirements 74 Traveling Ladders and Gantries 195 Inspections, Tests, Operation, and Maintenance . 21Table4.3.2 Access . 20Mandatory AppendixI Opera
11、ting Manual Layout 23iiiFOREWORDThis Standard provides for the safe design of powered platforms for building maintenance,where window cleaning and related services are accomplished by means of suspended equipmentat heights in excess of 35 ft (11 m) above a safe surface, e.g., grade, street, floor, o
12、r roof level.The provisions of the Standard are intended to apply to all known systems used to supportsuspended maintenance equipment as well as the suspended equipment itself (either permanentlyinstalled or transportable equipment). Guidelines are also included for a buildings structuralsupport are
13、as as well as the building surfaces that actually interface with the equipment.The Standard does not apply to other suspended powered platforms used for remedial renova-tions or modifications to buildings. The safe use of these types of scaffolds is addressed byAmerican National Standard ANSI A10.8.
14、 The A120.1 Standard also does not relate to any serviceperformed by persons supported by equipment covered by any of the ANSI A92 standards.The purpose of this Standard is to ensure the protection of all powered platform users as wellas persons potentially exposed to use of the equipment. In develo
15、ping this Standard, safety hasbeen held as the primary consideration. The Standard requires that permanently installed ortransportable equipment be properly designed by a qualified professional engineer, taking intoaccount specific building features rather than attempting to accommodate the system t
16、o a build-ings structure and facade features that may not be suitable for its safe operation. In addition,care has been taken so as not to exclude or render obsolete any existing product or equipment.This Standard reflects the evolution of a project begun in 1962 by the American NationalStandards Co
17、mmittee on Window Cleaning Safety, A39. At that time, the Committee recognizedthat a new method was being developed for cleaning fixed sash windows by means of a specialscaffolding. In order to deal expertly with this new development, a new project was established,separate from that handled by the A
18、39 Committee. Following a general conference, the AmericanNational Standards Committee on Powered Platforms, ANSI A120, was formed, with the NationalSafety Council acknowledged as sponsor. In 1965, The American Society of Mechanical Engineerswas approved as cosponsor. In 1984, the Building Owners an
19、d Managers Association Internationalwas approved as Secretariat.A previous edition of the Standard, A120.1-1970, was administratively withdrawn in 1989. ThisStandard had established safety requirements for the design, construction, installation, inspection,and use of power-operated platforms for ext
20、erior building maintenance. The Standard did notapply to temporary equipment used for construction work or to devices raised and loweredmanually.A120.1-1992 was the result of joint action by participating organizations under the auspices ofthe American National Standards Institute. That Standard was
21、 approved through two votes ofthe ANSI A120 Committee, at a meeting in New York City (October 17, 1991) and by letter ballot(dated December 30, 1991).In 1995, ASME again assumed sponsorship of the Standard. ASME A120.1-1996 was approvedby ANSI on April 17, 1996. ASME A120.1-2001 was approved by ANSI
22、 on July 3, 2001. ASMEA120.1-2006 was approved by ANSI on September 20, 2006.This revision was approved by the American National Standards Institute on July 16, 2008.ivASME A120 COMMITTEESafety Requirements for Powered Platformsfor Building Maintenance(The following is the roster of the Committee at
23、 the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSB. L. Gartner, ChairC. S. Caulkins, Vice ChairA. Byk, SecretarySTANDARDS COMMITTEE PERSONNELW. T. Ayres, W. T. Ayres core; kink; lay; andstrand added6 2.3.4.1 Added8, 9 3.2.2 Last paragraph added3.2.4(a) First paragraph revised3.2.8
24、 Added10 3.3.4(c) Revised14 3.7.5.5(a) Second sentence added17 3.10.3.1 New subpara. (a) added and subsequentsubparagraphs redesignatedviiINTENTIONALLY LEFT BLANKviii(08)ASME A120.1-2008SAFETY REQUIREMENTS FOR POWERED PLATFORMSAND TRAVELING LADDERS AND GANTRIES FORBUILDING MAINTENANCE1 GENERAL RECOM
25、MENDATIONS ANDDEFINITIONS1.1 ScopeThis Standard establishes safety requirements forpowered platforms (scaffolds) for buildings where win-dow cleaning and related services are accomplished bymeans of suspended equipment at heights in excess of35 ft (11 m) above a safe surface (e.g., grade, street, fl
26、oor,or roof level). Additionally, this Standard establishessafety requirements for permanent traveling ladders andgantries (TLG).It pertains to either permanently installed or trans-portable equipment meeting the requirements of thisStandard.Powered platforms and TLGs may be used or operatedby one o
27、r more persons engaged in services such asnormal building maintenance. The equipment may alsobe used for tasks such as caulking, metal polishing,reglazing, or other building repairs.This Standard does not apply to other suspendedpowered platforms used for remedial renovations ormodifications to buil
28、dings. The safe use of these scaf-folds is included in ANSI A10.8-2001, SafetyRequirements for Scaffolding.This Standard does not relate to any service performedby persons supported by equipment covered by any ofthe ANSI A92 standards.1.2 PurposeThe purpose of this Standard is to ensure the protec-t
29、ion of powered platform users and traveling ladder andgantry users, and persons exposed to equipment usedwith the previously described maintenance of buildings.It is also intended for use by architects, engineers,designers, manufacturers, inspectors, purchasers, build-ing owners, and others associat
30、ed with the installation ofpowered platforms and traveling ladders and gantries.Additionally, it is recommended for use by enforce-ment agencies having jurisdiction over the installationof powered platforms and traveling ladders and gantriesto ensure that the platforms meet the safety provisionsof t
31、his Standard.11.3 Application of This Standard1.3.1 Applications. This Standard applies to theinstallation of all powered platforms and traveling lad-ders and gantries.1.3.2 Deviations. Deviations from the requirementsof this Standard may be granted by the enforcing author-ity if it is determined th
32、at a specific requirement createspractical difficulty or excessive hardship, or where thespecific requirement prevents the use of a novel design,only when equivalent safety is provided.1.3.3 Alterations(a) Any existing building being serviced may con-tinue to be serviced until the building is altere
33、d, requir-ing a modification of the installation. Alteration of thebuilding and equipment modification shall then bemade to comply with the applicable parts of thisStandard.(b) If the authority having jurisdiction believes thathazards exist to warrant a change in an existing installa-tion, the autho
34、rity may require compliance with anypart of this Standard. If a qualified person deems thata hazard exists, the hazard shall be corrected, and thecorrection shall be in compliance with this Standard.(c) Once a building permit is issued or modified, thecurrent version of the Standard shall apply.1.4
35、Applicable UnitsThis edition of the Standard uses U.S. Customary unitswith acceptable metric (SI) units shown in parentheses.NOTE: The metric values stated may not be exact equivalents tothe U.S. Customary units.Information on the usage of SI units and their conver-sion from U.S. Customary units is
36、contained in the IEEE/ASTM SI 10-1997, Standard for the Use of the Interna-tional System of Units (SI): The Modern Metric System;or ASME Guide SI-1, Orientation and Guide for Use ofSI (Metric) Units.1.5 ReferencesWhen a nationally recognized standard, other thanthat specifically referred to in para.
37、 1.1, is referred toand is superseded by a revision, the edition current atthe time of acceptance of this Standard shall apply.(08)(08)(08)ASME A120.1-2008Aluminum Construction ManualSpecifications for Aluminum StructuresAluminum Standards and DataPublisher: Aluminum Association, Inc. (AA), 1525Wils
38、on Boulevard, Arlington, VA 22209ANSI A10.8-2001, Safety Requirements for ScaffoldingPublisher: American National Standards Institute, Inc.(ANSI), 25 West 43rd Street, New York, NY 10036ANSI/ASSE A10.32-2004, Fall Protection Systems forConstruction and DemolitionsPublisher: The American Society of S
39、afety Engineers(ASSE), 1800 East Oakton Street, Des Plaines, IL 60018Federal Specification (FS)RR-W-410-C for Wire RopePublisher: Superintendent of Documents, U.S.Government Printing Office (GPO), 732 N. CapitolStreet, NW, Washington, DC 20401National Electrical CodePublisher: National Fire Protecti
40、on Association (NFPA),1 Batterymarch Park, Quincy, MA 02169-74711.5.1 Listed below are additional nationally recog-nized standards-promulgating organizations.American Gear Manufacturers Association (AGMA),500 Montgomery Street, Alexandria, VA 22314-1581American Institute of Steel Construction, Inc.
41、(AISC),One East Wacker Drive, Chicago, IL 60601-2001ASTM International (ASTM), 100 Barr Harbor Drive,West Conshohocken, PA 19428-2959American Society of Civil Engineers (ASCE), 1801Alexander Bell Drive, Reston, VA 20191-4400The American Society of Mechanical Engineers (ASME),Three Park Avenue, New Y
42、ork, NY 10016-5990American Welding Society, (AWS), 550 NW Le JeuneRoad, Miami, FL 33126National Electrical Manufacturers Association (NEMA),1300 North 17th Street, Rosslyn, VA 222091.6 Terms and Definitionsaccepted: accepted by the enforcing agency havingjurisdiction.allowable stresses: the working
43、stress limitations imposedby a nationally recognized standards-promulgatingorganization.angulated roping: a means of stabilization where theupper point of suspension is inboard from the attach-ments on the suspended unit, causing the suspendedunit to bear against the face of the building.2bird cage:
44、 the appearance of a wire rope where the outerstrands displace, forming a cage appearing as anincrease in the overall rope diameter.brake, primary: a brake designed to be automaticallyapplied whenever power to the prime mover is inter-rupted or discontinued.brake, secondary: a brake designed to prev
45、ent the descentof the suspended or supported equipment in the eventof an overspeed condition.brake typesdisc: a brake in which the holding effect is obtainedby frictional resistance between faces of rotating discsor shoes.self-energizing band: a unidirectional brake in whichthe braking action is obt
46、ained by frictional resistancebetween a stationary flexible brake band and a rotatingdrum, whereby the friction force increases the holdingforce or pressure on the friction surfaces.shoe brake: a brake in which the holding effect isobtained by applying pressure on two or more station-ary segmental f
47、riction elements against a rotating cylin-drical wheel or drum.wire rope engaging: a brake that grips onto a wire rope,without damage to the rope, to prevent the descent ofa suspended unit.building: a structure wherein people may live, work, orotherwise make use of the facilities offered within thes
48、tructure.building face roller: a guide roller designed to ride on theface of the building wall to prevent the suspended orsupported equipment from abrading the face of thebuilding.building maintenance: exterior or interior operations suchas window cleaning, caulking, metal polishing, reglaz-ing, and
49、 general light maintenance or repairs on buildingsurfaces.cable: a conductor, or group of conductors, enclosed ina weatherproof sheath, which may be used to supplyelectrical power or control currents for equipment andto provide voice communication circuits.carriage: a wheeled vehicle used normally for the hori-zontal movements and support of equipment.catalog strength: the rated strength of any product ormaterial as designated by its manufacturer or vendor,based on standard testing procedures or acceptable engi-neering design practices.certified: accepted by design, evaluation, or inspect
