ASME A90.1:2003 pdf free download SAFETY STANDARD FOR BELT M AIiILIFTS
1 GENERAL
1.1 Scope
This Standard applies to the manufacture, installation,maintenance, inspection,and operation of manlifts.Manlifts covered by this scope consist of steps (plat-forms) and accompanying handholds mounted on, orattached to, an endless belt operating vertically in onedirection only and being supported by, and driventhrough, pulleys at the top and bottom. These manliftsare intended for conveyance of persons only. It is notintended that this scope cover moving stairways, eleva-tors with enclosed platforms (Paternoster elevators),gravity lifts, or conveyors used only for conveying mate-rials.
1.2 Purpose
The purpose of this Standard is to establish safetyrequirements for manlifts. It is intended for use as astandard reference for manlift safety requirements bymanufacturers, architects, plant designers, installers,and consulting engineers,and for users of manliftsthrough voluntary application and for governmentalauthorities.
1.3 Application
(a)This Standard applies to manlifts used to carryonly authorized personnel trained in their use.Manliftsshall not be available to the general public.
(b) Because of the difficulty in enforcing paras.4.2and 7.1(a),manlifts are not recommended for use onconstruction sites.
(c) One year after the date of issuance, all provisionsof this Standard shall apply to both new and existinginstallations, except as noted in individual sections.
1.4Exceptions
In case of practical difficulty or unnecessary hardship,the enforcing authority may grant exceptions from theliteral requirements of this Standard or permit the useof alternate methods, but only when it is clearly evidentthat equal safety is thereby secured.
NOTE: It is suggested that in cases where exceptions are askedfor, the enforcing authority consult with The American Society ofMechanical Engineers, Secretary, A90 Standards Committee, ThreePark Avenue, New York, NY 10016-5990.
1.5 Units of Measurement
This Standard contains SI (metric) units as well asCustomary units. The Sl units have been directly (softly)converted from the Customary units.
REFERENCES
This Standard is intended for use in conjunction withthe following American National Standards.
ANSI A12.1-1973,Safety Requirements for Floor andWail Openings,Railings, and Toeboards
ANSI Ai4.3-1984,Safety Requirements for FixedLadders
Publisher: American National Standards Institute(ANSI),25 West 43rd Street,New York, NY 10036ASME B15.1-2000,Safety Standard for MechanicalPower ‘Transmission Apparatus
ASME B18.5-1990, Round Head Bolts
Publisher: The American Society of Mechanical Engi-neers (ASME International),Three Park Avenue, NewYork,NY 10016-5990;Order Department: 22 LawDrive, Box 2300,Fairfield, NJ 07007-2300
NFPA 70-1984, National Electrical Code
Publisher: National Fire Protection Association (NFPA),1 Batterymarch Park,Quincy, MA 02269-9101
3DEFINITIONS
belt-breaking strength: the amount of tensile load [pounds(Newtons)] applied to a belt causing its fracture.
belt travel: the distance between the centers of the topand bottom pulleys when the bottom pulley is at itshighest position.
debris deflector: a protective shield positioned to deflectfalling objects away from the bottom pulley.
elevator bolt: a flathead countersunk elevator bolt asdefined by ASME B18.5-1990, Table 9.
factor of safety: the ratio of the tensile strength of thematerial to the allowable stress when a part is subjectedto full-load operation.
handhold (handgrip): a cup-shaped device securelyattached to the belt, which can be grasped by the passen-ger to provide a means for maintaining balance.
manlift: a power-driven endless belt that moves in onedirection only, and is provided with steps (platforms)
ASME A90.1:2003 pdf free download
