ASME B30.20-2010 pdf free download.Below-the-Hook Lifting Devices.
SECTiON 20-0.1: SCOPE OF ASME B30.20
Volume B34J.20 includes provisions that apply to the marking, construction, insta11ation inspection, testing, maintenance, and operation of below-the-hook lifting devices, other than components addressed by other ASME B30 volumes or other standards, used for attaching loads to a hoist. The devices are arranged in five chapters as follows:
Chapter 20-1: Structural and Mechanical Lifting Devices
Chapter 20-2: Vacuum Lifting Devices
Chapter 20-3: Close Proximity Operated Lifting Magnets
Chapter 20-4: Remotely Operated Lifting Magnets Chapter 20-5: Scrap and Material 1 landling
Grapples
SECTION 20-0.2: DEFINITIONS — GENERAL
govern mental agenc or the employer in the absence of governmental jurisdiction.
alteration: a physical change, addition, or deletion that modifies the original design, or intended functioning, of the below-the-hook lifting device.
altered: see alteration.
appointed: assigned specific responsibilities by the employer or the employer’s representative.
authorized: appointed by a duly constituted administrative or regulatory authority.
below-the-hook lfting device: a device used for attaching loads to a hoist. The device may contain components such as slings, hooks, and rigging hardware addressed by other ASME B30 volumes or other standards.
design category: lifter classification that specifics the design factor to be used to establish static stress limits for the design.
designated person: a person selected or assigned by the employer or the employer’s representative as being competent to perform specific duties.
hoist: a machinery unit that is used for lifting and lowering.
lifter: see belozc’-t he-hook lifting device.
lfting device: see below-the-hook lifting device. ,uothfication: see alteration.
nodifled: see alteration.
normal operatinç conditions: conditions during which the lifter is performing functions within the scope of the original design.
quail! inI person: a person who, by possession of a recogni7ed degree in an applicable field or certificate of professional standing, or who, by extensive knowledge, training, and experience, has successfully demonstrated the ability to solve or resolve problems relating to the subject matter and work.
rated load: the maximum load for which the equipment is designated by the manufacturer.
repair: the process of reconditioning, renewal, or repLacement of parts, components, and/or subsystems to a condition equal to the original manufacturer’s specifications for the purpose of ensuring performance in accordance with the applicable requirements.
service class: lifter classification that establishes the allowable stress range for the specified fatigue life (load cycles).
shall: indicates that the rule is mandatory and must he followed.
should: indicates that the rule is a recommendation, the advisability of which depends on the facts in each situation.
SECTION 20-0.3: DEFINITIONS FOR CHAPTER 20-1
abnormal operatinç conditions: environmental conditions that are unfavorable, harmful, or detrimental to or for the operation of structural and mechanical lifting devices, such as excessively high or low ambient temperatures, exposure to adverse weather, corrosive fumes, dust-laden or moisture-laden atmospheres, and hazardous locations.
friction-type pressure-gripping ifters: lifters that grip the load without significant or harmful permanent deformation of the load surface (see Fig. 20-0.3-1).
grip ratio: the ratio of the sum of the horizontal forces on one side of the load to the live weight of the load. For example, if the total horizontal force on one side of the load is 100,000 lb and the live load is 50,000 Ib, the grip ratio is 2. For purposes of this calculation, the weight of the load does not include the weight of the lifter (see Fig. 20-0.3-2).
indentation-h/pc pressure-gripping lifters: lifters that carry the load by applying force to indent the sides of the load (see Fig. 20-0.3-3).
ingot turnover grab: a manipulating lifter [Fig. 20-0.3-4, illustration (e)].
latch: a device for holding a lifter in the open or closed position.
latch, automatic: a sequencing latch mechanism operated by lifter motion.
lifting beam (spreader beam): a load-supporting lifter [see Fig. 20-0.3-5, illustration (a)].
lock bar sheet lifter: a supporting lifter [see Fig. 20-0.3-5, illustration (j)].
manipulating lifter: a lifter that rotates the load about one or more axes during the lifting process (see Fig. 20-0.3-4).