ASME B30.4:2020 pdf free download

ASME B30.4:2020 pdf free download.Portal and Pedestal Cranes.
load hoist a hoist drum and rope reeving system used for hoisting and lowering loads.
lower load block: the assembly of hook, shackle, swivel, sheaves, pins, and frame suspended by the hoisting rope.
Iufjing boom: a member hinged to and part of the superstructure that raises and lowers to change load radius and is used for supporting the hoisting tackle (see Figures 4-0.2.1-1 through 4-0.2.1-3).
maximum operating wind speed: the maximum wind speed permitted by the crane manufacturer or a qualified person for the continued operation of the crane.
normal service: service that involves operating at less than 85% rated load and not more than 10 lift cycles per hour except for isolated Instances.
operational aid: an accessory that provides information to facilitate operation of a crane or that takes control of particular functions without action of the operator when a limiting condition is sensed. Examples of such devices Include, but are not limited to, the following: anti-two block device, rated capacity indicator, rated capacity (load) limiter, boom angle or radius indicator, drum rotation indicator, load indicator, and wind speed Indicator.
out.of.service: the condition of a crane when unloaded, without power, with the controls unattended, and prepared to withstand winds above the in-service level.
parking track: for rail-mounted cranes, a section of track supported so that it is capable olsustaining storm or windinduced wheel loads: it is provided with storm anchorages when required.
pedestal: a fixed raised crane base or foundation that may be solid or enclosed, but without a portal opening.
pintle/kinqpost: fixed or rotating vertical structure (depending upon bearing arrangement) supporting the superstructure, which allows for rotation.
qualified person: a person who, by possession of a recognized 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.
radius (load): the horizontal distance from a projection of the axis of rotation to the base of the crane portal or pedestal, before loading, to the center of vertical hoist line or tackle with load applied.
rail clamp: a device for fastening a traveling crane to its rails to limit storm or wind-induced travel.
remote-control station: a location, not on the crane, from which the operator can control all the crane movements.
rape: refers to rope covered by ASME B30.30.