Abstract： ASME A120.1:2008 pdf download.Safety Requirements for Powered Platforms and Traveling Ladders and Gantries for Building Maintenance. 3.3.9 Trolley System. A track-mounted trolley system, supported from an overhead structure. may be used as...

ASME A120.1:2008 pdf download.Safety Requirements for Powered Platforms and Traveling Ladders and Gantries for

Building Maintenance.

3.3.9 Trolley System. A track-mounted trolley system, supported from an overhead structure. may be used as a means of suspension, under the definition of a carriage, provided that the installation complies with the requirements

of this Standard and with the following specific rcqui rem ents:

(a) Each installation shall be provided with a means for safe egress of personnel in the event of a loss of power to the equipment.

(Ii) A maintenance area shall be provided to permit safe access to the trolley(s).

(C) Means shall he provided to prevent the equipment from unintentionally traversing in a horizontal direction.

(d) Manually propelled trolleys shall require a maximum of 40 lb of pull to move the trolley along its track.

3.4 Outriggers (Beam Type)

Outriggers may be used on buildings to support ground-rigged self-powered platforms where the point of suspension does not exceed 130 ft (39.6 m) above a safe surface unless a continuous means of engagement is provided on the

face of the building where the maximum rise of the platform shall be limited to 300 ft (92 m).

The initial installation shall be designed by, or under the direction of, a registered professional engineer to

comply with the following safety requirements:

a) Platforms shall be required to be disengaged from the outriggers after each day’s use or the platforms shall

be secured and stored at grade with the power supply disconnected. All suspension wire ropes shall be attached to their outriggers with forged double-locking snap hooks or equivalent devices.

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