ASME A120.1-2006 pdf download.Safety Requirements for Powered Platforms and Traveling Ladders and Gantries for Building Maintenance.
1 GENERAL RECOMMENDATIONS AND DEFINITIONS 1.1 Scope This Standard establishes safety requirements for powered platforms (scaffolds) for buildings where win- dow cleaning and related services are accomplished by means of suspended equipment at heights in excess of 35 ft (11 m) above a safe surface (e.g., grade, street, floor, or roof level). Additionally, this Standard establishes safety requirements for permanent traveling ladders and gantries (TLG). It pertains to either permanently installed or trans- portable equipment meeting the requirements of this Standard. Powered platforms and TLGs maybe used oroperated by one or more persons engaged in services such as normal building maintenance. The equipment may also be used for tasks such as caulking, metal polishing, reglazing, or other building repairs. This Standard does not apply to other suspended powered platforms used for remedial renovations or modifications to buildings. The safe use of these scaf- folds is included in ANSI A10.8-2001, Safety Require- ments for Scaffolding. This Standard doesnotrelate toanyservice performed by persons supported by equipment covered by any of the ANSI A92 standards. 1.2 Purpose The purpose of this Standard is to ensure the protec- tion of powered platform users and traveling ladder and gantry users, and persons exposed to equipment used with the previously described maintenance ofbuildings. It is also intended for use by architects, engineers, designers, manufacturers, inspectors, purchasers, build- ingowners, andothers associated withtheinstallationof powered platforms and traveling ladders and gantries. Additionally, it is recommended for use by enforce- ment agencies having jurisdiction over the installation ofpowered platforms and traveling ladders and gantries to ensure that the platforms meet the safety provisions of this Standard.
1.3 Application of This Standard 1.3.1 Applications. This Standard applies to the installation of all powered platforms and traveling lad- ders and gantries. 1.3.2 Deviations. Deviations from the requirements ofthis Standard may be granted by the enforcing author- ity if it is determined that a specific requirement creates practical difficulty or excessive hardship, or where the specific 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 altered, requir- ing a modification of the installation. Alteration of the building and equipment modification shall then be made to comply with the applicable parts of this Standard. (b) If the authority having jurisdiction believes that hazards exist to warrant a change in an existing installa- tion, the authority may require compliance with any part of this Standard. If a qualified person deems that a hazard exists, the hazard shall be corrected, and the correction shall be in compliance with this Standard. (c) Once a building permit is issued or modified, the current version of the Standard shall apply. 1.4 References When a nationally recognized standard, other than that specifically referred to in para. 1.1, is referred to and is superseded by a revision, the edition current at the time of acceptance of this Standard shall apply. Aluminum Construction Manual Specifications for Aluminum Structures Aluminum Standards and Data Publisher: Aluminum Association, Inc. (AA), 1525 Wilson Boulevard, Arlington, VA 22209 ANSI A10.8-2001, Safety Requirements for Scaffolding Publisher: American National Standards Institute, Inc. (ANSI), 25 West 43rd Street, New York, NY 10036 ANSI/ASSE A10.32-2004, Fall Protection Systems for Construction and Demolitions
Federal Specification (FS) RR-W-410-C for Wire Rope Publisher: Superintendent of Documents, U.S. Government Printing Office (GPO), 732 N. Capital Street, NW, Washington, D.C. 20402-9325 National Electrical Code Publisher: National Fire Protection Association (NFPA), One Batterymarch Park, Quincy, MA 02169-7471 1.4.1 Listed below are additional nationally recog- nized standards-promulgating organizations. American Gear Manufacturers Association (AGMA), 500 Montgomery Street, Alexandria, VA 22314-1581 American Institute of Steel Construction, Inc. (AISC), One East Wacker Drive, Chicago, IL 60601-2001 ASTM International (ASTM), 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 American Society of Civil Engineers (ASCE), 1801 Alexander Bell Drive, Reston, VA 20191-4400 The American Society of Mechanical Engineers (ASME), Three Park Avenue, New York, NY 10016-5990 American Welding Society, (AWS), 550 NW Le Jeune Road, Miami, FL 33126 National Electrical Manufacturers Association (NEMA), 1300 North 17th Street, Rosslyn, VA 22209 1.5 Definitions accepted: accepted by the enforcing agency having juris- diction. allowable stresses: the working stress limitations imposed by a nationally recognized standards-promulgating organization. angulated roping: a means of stabilization where the upper point of suspension is inboard from the attach- ments on the suspended unit, causing the suspended unit to bear against the face of the building. brake, primary: a brake designed to be automatically applied whenever power to the prime mover is inter- rupted or discontinued. brake, secondary: a brake designed to prevent the descent of the suspended or supported equipment in the event of an overspeed condition. brake types disc: a brake in which the holding effect is obtained by frictional resistance between faces of rotating discs or shoes.