ASME A120.1:2021 pdf download

ASME A120.1:2021 pdf download.Safety Requirements for Powered Platforms and Traveling Ladders and Gantries for Building Maintenance
1.1 Scope
This Standard establishes safety requirements for powered platforms (scaffolds) for buildings where window cleaning and related services are accomplished by means ofsuspended 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 transpor- table equipment meeting the requirements of this Stan- dard. Powered platforms and TLGs may be used or operated 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 ofthese scaffolds is included in ANSI A10.8-2001, Safety Requirements for Scaffolding. This Standard does not relate to any service performed bypersons supported byequipmentcovered byanyofthe ANSI A92 standards.
1.2 Purpose
The purpose ofthis Standard is to ensure the protection of powered-platform users and traveling ladder and gantry users, and persons exposed to equipment used with the previously described maintenance of buildings. It is also intended for use by architects, engineers, designers, manufacturers, inspectors, purchasers, building owners, and others associated with the installa- tion of powered platforms and traveling ladders and gantries. Additionally, itis recommended foruse byenforcement agencies having jurisdiction over the installation of powered 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 instal- lation ofall powered platforms and traveling ladders and gantries. Permanentpowered platforms shall be provided on all buildings with vertical platform travel exceeding 300 ft (91 m). 1.3.2 Deviations. Deviations from the requirements of this Standard maybe granted bythe enforcingauthorityif it is determined that a specific requirement creates prac- tical difficultyor excessive hardship, or where the specific requirementprevents the use ofanovel design, onlywhen equivalent safety is provided. 1.3.3 Alterations (a) Any existing building being serviced may continue to be serviced until the building is altered, requiring a modification ofthe installation. Alteration ofthe building and equipmentmodification 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 ofthis Standard. Ifa qualified person deems thata 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.
1.7 Terms and Definitions accepted: accepted by the enforcing agency having juris- diction. allowable stresses: the workingstress limitations imposed by a nationally recognized standards-promulgating or- ganization. anchor: a point of attachment that transfers load to the building. anchor, adhesive: a metal element post-installed into a hardened concrete building-structure member and used to transfer applied loads into the concrete by means of chemical bonding compounds. anchor, strain relief: a buildingpointofattachmentnear the power outlet, used for attaching power cable strain- relief connectors. anchor, tie-back: a building structure point of attach- ment used for securing any required tie-back ropes of transported and/or portable support equipment. anchor, tie-down: a building-structure point of attach- ment used for resisting roofcar or outrigger overturning moment loads. anchor, tie-in (ISA): a building-façade point of attach- ment used in intermittent stabilization for transferring external platform loads into the building structure. anchor, track or rail: a building-structure point of attachment used for holding carriage-supporting rails and tracks. anchorage: a secure point ofattachment for personal fall arrestlifelines, lanyards, or deceleration devices, and that is independent ofthe means ofsupporting or suspending the user. angulated roping: a means of stabilization where the upperpointofsuspensionisinboardfromtheattachments on the suspended unit, causingthe suspended unitto bear against the face of the building. automatic equipment: see unmanned suspended equip- ment. base: see socket.