ASME B30.3:2004 pdf free download

ASME B30.3:2004 pdf free download.Construction Tower Cranes.
rated load (load rating): the maximum allowable working load designated by the manufacturer; rated loads are expressed in pounds, kilograms, short tons, or metric tons.
remote control station: a location, not on the crane, from which the operator can control all the crane movements.
rope: refers to wire rope unless otherwise specified.
rotation-resistant rope: wire rope consisting of an inner layer of strands laid in one direction covered by a layer of strands laid in the opposite direction; this has the effect of counteracting torque by reducing the tendency of the finished rope to rotate.
heavy: service that involves operating at 85% to
100% of the rated load or in excess of 10 lift cycles per hour as a regular specified procedure. Cranes regularly engaged in rapid concrete placement operations may fall into this category.
serr’ice, light: service that involves irregular operation with loads generally about one-half or less of the rated load.
service, normal: service that involves operating occasionally at rated load but normally at less than 85% of the rated load and not more than 10 lift cycles per hour, except for isolated instances.
service life: the time, expressed as the sum of the periods of operation, over which a stressed component can function without undue risk of failure when the crane is operated in accordance with the manufacturer’s instructions under either light, normal, or heavy service.
shall: this word indicates that the ruk’ is mandatory and must be followed.
sheave: a grooved wheel or pulley used with a rope to change the direction and point of application of a pulling force.
should: this word indicates that the rule is a recommendation, the advisability of which depends on the facts in each situation.
stahili:crs: auxiliary devices for increasing stability of a crane, such as guys, for example.
structural competence: the ability of the machine and its components to withstand the stresses imposed by applied rated and dynamic loads.
superstructure: that portion of the crane that rotates.
swing (slew): rotation of the superstructure for movement of loads in a horizontal direction about the axis of rotation.