ASME B30.4 pdf free download

ASME B30.4-2020 pdf free download.Portal and Pedestal Cranes Safety Standard for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings.
Volume B30.4 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. that may be mounted on a fixed or traveling base, and to any variation thereof that retains the same fundamental characteristics.
This Volume applies only to portal and pedestal cranes having a luffing boom and utilizing a drum and rope for load hoisting. The requirements for tower cranes (refer to ASME B30.3). telescopic boom cranes, twin boom container handling cranes, and articulating boom cranes are not included in this Volume.
SECTION 4-0.2: DEFINITIONS
4-0.21 Types of Cranes
pedestaicrane: a crane consisting of a rotating superstructure with operating machinery and boom, all of which is mounted on a pedestal (see Figure 4.0.2.1.1).
portal crane: a crane consisting of a rotating superstructare 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 Figures 4-0.2.1-2 and 4-0.2.1.3).
4-0.2.2 GeneraL
accessory: a secondary part or assembly of parts that contributes to the overall function and usefulness of the crane.
alteration (modification): any change in the original equipment manufacturer’s design configuration of the crane that pertains to load-supporting components, load-positioning components, and other components that affect the safe load-carrying capability of the crane (e.g counterweights, holding valves), including operational aids, limit devices, and other safety equipment.
axis of rotation: the vertical axis around which the superstructure rotates.
boom: a member used for supporting the hoisting tackle. with its outer end supported by ropes, chains, rods, or hydraulic cylinder(s).
boom point- the outward end of the boom.
boom stop: a device or structure designed to limit boom travel to its highest allowable position.
brake: a device, other than a motor, used for retarding or stopping motion by means of friction or power.
bumper: an energy-absorbing device for reducing impact when a moving boom or crane reaches the end of its permitted travel. This is also known as a butler.
cab: the operator’s compartment on the crane. clutch: a means for engagement or disengagement of power.
counterweight: weight used to supplement the weight of the crane in providing stability for lifting loads; it rotates with the superstructure.
drum: the cylindrical member around which the rope is wound for lifting or lowering the load or boom.
gantry: a movable structural frame consisting of columns and bracing capable ofsupportinga crane with its working and dynamic loads.
heavy service: service that involves operating at 85% to
100% of rated load or in excess of 10 lift cycles per hour as
a regular specified procedure.
in-service: the condition of a crane ready for or engaged in work; an operator Is at the controls.
jib: an extension attached to the boom point to provide added boom length for lifting specified loads. The jib may be in line with the boom or offset to various angles in the vertical plane of the boom.
level luffing boom: a type of luffing boom arrangement where the load stays at a constant elevation during luffing of the boom.ASME B30.4 pdf download.