ASME A120-2008 pdf free download.Safety Requirements for Powered Platforms and Traveling Ladders and Gantries for Building Maintenance
2 BUILDING DESIGN REQUIREMENTS
2.1 General All buildings with wall surfaces requiring cleaning or buildings not provided with operable windows shall be designed relative to the use of the equipment covered by this Standard. All buildings shallbe designed to safelyaccommodate powered platforms and traveling ladders and gantries to be used for remedial work. The design shall incorporate all features needed to provide the degree of safety required for users of the equipment and those exposed to use of the equipment. All equipment and anchorages designed in accor- dance with this Standard shall be used only as herein described. Variations in use or modifications of its designed anchorages shall be approved, prior to use, by a registered professional engineer experienced in the design and installation of such equipment. All loads and structural attachments to the building shall be approved byaregistered architectora registered professional engineer.
2.1.1 Installation Owner. When the equipment is to be continuously used ata specific location, the registered professional engineer for the building shall provide to the owner of each installation the following materials constituting the installation design record: (a) architectural and structural drawings ofthose por- tions of the building contacted by the equipment or supporting the equipment (b) engineering drawings of the equipment anchor- ages and their means of attachment or support (c) calculations or test reports to verify compliance of the design with this Standard (d) a certification by a registered professional engi- neer that the equipment has been initially installed in compliance with this Standard and that the equipment is compatible with the building
2.2 Design Requirements
The design requirements for each installation shall be based on the limitations (stresses, deflections, etc.) established by nationally recognized standards promul- gated by the agencies listed in para. 1.4, or by equivalent Standards found acceptable to the agency having juris- diction. The design standards used shall be recorded in the installation design record.
2.3 Specific Building Design Requirements
2.3.1 GeneralRequirements. Allbuildings onwhich or in which equipment will be installed for window cleaning and related services shall be designed and con- structed to sustain all the loads imposed on the building by the equipment, with stresses or deflections not to exceed those permitted by nationally recognized stan- dards referred to in this Standard.
2.3.2 Safety Requirements. All buildings shall be designed and constructed to allow the equipment to be installed and used in a safe manner and to provide safe access to and egress from the equipment and areas used for maintenance of the equipment.
2.3.3 Tie-in-Guides (a) The exteriors of all buildings shall be designed with guides to provide a positive and continuous means of engagement between the suspended or supported portion of the equipment and the building during full vertical travel of the suspended or supported unit on the face of the building. (b) A method shall be provided to separate the guide shoes from the platform without the use of tools, in case of an emergency.
2.3.3.1 Exceptions (a) Where the building exterior prohibits the installa- tion of building tie-in-guides at the uppermost elevation of the building, they may be omitted for not more than 50 ft (15 m) of the uppermost elevation. When angulated roping is employed, the allowable unguided distance may be increased to 75 ft (23 m), provided a stabilizing force of at least 10 lb (44.5 N) is maintained under all conditions of loading. (b) Continuous tie-in-guides may be eliminated on the exterior of buildings where either (1) the building is provided with an intermittent stabilization system (equipment tie-in-devices) in accor- dance with para.
2.3.3.3; or (2) the equipment installation utilizes angulated roping, a stabilizing force of at least 10 lb (4.5 kg) is maintained under all conditions of loading, and only where the rise of the suspended portion of the equip- ment does not exceed 130 ft (40 m). (c) Continuous tie-in-guides, angulated roping, and workstation tie-in-devices are not required for interior building maintenance equipment. ASME A120 pdf download.ASME A120-2008 pdf free download
