ASME A120.1 pdf download

ASME A120.1 pdf download.Safety Requirements for Powered Platforms and Traveling Ladders and Gantries for Building Maintenance.
ASME A120.1 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 (II m) above a safe surface (e.g., grade, street, floor, or roof level). Additionall> this Standard establishes safety requirements for permanent traveling ladders and gantries (TLG).
It pertains to either permanently installed or transportable equipment meeting the requirements of this Standard.
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 of these scaffolds is included in ANSI AlO,8-2001, Safety Requirements for Scaffolding.
This Standard does not relate to any service performed by persons supported by equipment covered by any of the ANSI A92 standards.
(06) 1.2 Purpose
The purpose of this 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, pu rchasers, building owners, and others associated with the installation of powered platforms and traveling ladders and gantries.
Additionally, it is recommended for use by enforcement 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.
When used, imbedded tie-down anchors shall be of noncorrosive metal. The anchor installation shall be inspected for compliance with design requirements by a registered professional engineer. The report of inspection shall be included in the installation design record. Anchors should he tested at the discretion of the inspecting engineer.
2.3.6 Electrical Requirements. The electrical design shall be in accordance with the following:
(a) General design shall be in accordance with the applicable requirements of the National Electrical Code edition in effect at the time of making the design, e.g., grounding, wire sizes, motors, controls and control wiring, and enclosures.
(h) When full load is applied to the circuit, building conductors shall be of such capacity that not more than a 3% voltage drop from nominal equipment requirements shall occur at each building outlet.
(c) Communications and power connections shall he weatherproof and provided with locking type connectors. They shall be protected from damage and abrasion.
(d) Each communication and power outlet shall be provided with an adjacent strain relief anchor to prevent force from being applied to the outlet or to the conduit leading to the outlet by movement of the equipment.
(e) The equipment power supply shall be from an independent electrical circuit that shall remain separate from all other equipment within or on the building, except hand tools used in conjunction with the equipment. If the building is provided with an emergency power system, the equipment circuit may be designed so it may be connected to the emergency circuit.
(J) The power circuit shall be provided with a cutoff switch that can be locked in the “OFF” position. To allow the equipment operators access to the switch, it shall be conveniently located relative to the primary operating area of the equipment.
(g) Power and communication outlets shall be located at the approximate elevation of the primary equipment operating area. The outlets should be located so that no more than 100 ft (30.38 m) of supply cable need be used for the horizontal area being traversed.
(h) The power circuit shall contain a separate equipment electrical grounding conductor.
(i) Carriage track systems shall be electrically connected to an earth ground.
(j) Conmunication Facilities. A two-way voice communication system shall be provided between the equipment operators and a manned station while the working platform is in use. The communication facility shall be operable and manned at all times when the equipment is being used.