ASME B30.4 pdf download

ASME B30.4 pdf download.Portal and Pedestal Cranes.
Volume B34J.4 includes provisions that apply to the construction, installation, operation, inspection, testing, and maintenance of electric motor or internal- combustion engine-powered portal and pedestal cranes that adjust operating radius by means of a boom luffing mechanism or by means of a trolley traversing a horizontal boom, that may be mounted on a fixed or traveling base, and to any variation thereof that retain the same fundamental characteristics.
This Volume applies only to portal and pedestal cranes utilizing a drum and wire rope for hoisting and that are used for hoisting work. The requirements for tower cranes (refer to ASME 1330.3), telescopic boom cranes, twin boom container handling cranes, and articulating boom cranes are not included in this Volume.
SECTiON 4-0.2: DEFINITIONS
4-0.2.1 Types of Cranes
luffing crane: a crane with a boom pinned to the super. strticture at its inner end and containing load-hoisting tackle at its outer end and with a hoist mechanism to raise or lower the boom in a vertical plane to change load radius (see Figs. 4-0.2.1-1 through 4-0.2.1-3).
pedestal crane: a crane consisting of a rotating superstructure with operating machinery and boom, all of which is mounted on a pedestal (see Fig. 4-0.2.1-1).
portal cram: a crane consisting of a rotating superstructure with operating machinery and boom, all of which is mounted on a gantry structure, usually with a portal opening between the gantry columns or legs for traffic to pass beneath the crane. The crane may be fixed or on a traveling base (see Figs. 4-0.2.1-2 and 4-0.2.1-3).
(15) 4-0.2.2 General
accessorl/: a secondary part or assembly of parts that contributes to the overall function and usefulness of a machine.
administrative or regulatory authority: governmental agency or the employer in the absence of governmental jurisdiction.
(3) Lifting attachments thit are a permanent part of the crane in its working condition shall be considered part of the load for stability calculations whether or not such attachments are part of the published load ratings.
4-1.2.2 Load Ratings Where Factors Other Than Stability Govern Lifting Performance
(a) For each stipulated operating radius, the manufacturer shall ascertain that the crane is capable of supporting rated loads without stresses exceeding predetermined acceptable values. Dynamic effects associated with hoisting and slewing shall be considered, and wind, if applicable, shall be taken in the least favorable direction and at the maximum in-service velocity, as specified by the manufacturer.
(b) Under any condition of loading, stresses may be affected by boom or jib length, counterweight arrangement, tower height (when applicable), swing speed changes and other dynamic effects, hoist line reeving, and hoisting speed range. Therefore, the structural, mechanical, hydraulic, electrical, or pneumatic competence shall be evaluated for the least favorable configuration and operating conditions covered by given load ratings.
(c) A nonsymmetrical mounting may require a considerably higher loading to produce a tipping condition in a direction other than the least stable dittion for which basic load ratings have been established. Therefore, ii the crane specification includes ratings for other than the least stable direction, such ratings may be governed by structural, mechanical, hydraulic, electrical, or pneumatic competence, in which case, they shall be verified.
(d) For cranes designed to travel with load, inertial forces, and forces induced by the maximum allowable track variation from level, as specified by the manufacturer, shall he considered in establishing structural, mechanical, hydraulic, electrical, or pneumatic corn petence.
4-1.2.6 Altered (Modified) Cranes
Whenever cranes are altered, unless the work is done by the original manufacturer, the owner of the crane shall maintain records of the work performed. The records shall include calculations and drawings prepared and signed by a qualified person that delineate the alterations and that verify that the entire crane and/or the affected components satisfy the applicable portions of this Volume. The calculations shall include a recitation of the engineering criteria governing the design. For all altered cranes, records of tests required under para.