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ASME B30.24-2008 pdf download

ASME B30.24-2008 pdf download.Container Cranes.
drum: a cylindrical member around which wire rope is wound for moving the load, boom, or trolley. equalizer: a device that compensates for unequal rope length or unequal load application. exposed: applies to hazardous objects not guarded or isolated, and capable of being contacted inadvertently. gantry frame: a structural assembly that supports the trolley girder beams. gantry leg: the structural member that supports a trolley girder. gantry travel: the crane movement in a direction parallel to the crane runway. headblock: an assembly of sheaves, pins, and frame sus- pended from the crane for connecting container-han- dling devices such as lift beams and spreaders. hoist: a machinery unit that is used for lifting or lowering a freely suspended load. hoist, main: the primary hoist mechanism provided for lifting and lowering the rated load. lifting apparatus: spreaders, cargo beams, heavy lift beams, cargo hooks, and other devices attached to the headblock for lifting loads. limit device (crane motion): a device that, when actuated, limits crane motion. load: the total superimposed weight on the spreader or hook. normal operating conditions: conditions under which a crane is performing functions within the scope of the original design. parts of line: the number of ropes supporting the load. qualified person: a person who, by possession of a recog- nized degree in an applicable field or a 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. rail sweep: a device attached to the crane and located in front of the crane’s leading wheels to remove obstruc- tions. rated load: the maximum allowable working load desig- nated by the manufacturer for which a crane or individ- ual hoist is designed and built. The term “safe working load” is commonly used to describe the rated load. reeving: a system in which a rope travels around drums and/or sheaves. rope: refers to wire rope unless otherwise specified. runway, gantry: the path on which the gantry travels. serviceplatform: a meansprovidedforworkers toperform maintenance, inspection, adjustment, or repair ofcranes.
sheave: a grooved wheel or pulley used with a rope to change direction and point of application of a pulling force. sheave, equalizer: a sheave used to equalize tension in opposite parts of the rope. Because of its slight move- ment, it is not termed a running sheave. shock load: any condition that causes a momentary increase in the forces in a load-supporting component beyond the weight of the actual load being lifted. side pull: the portion of the hoist pull acting horizontally when the hoist lines are not tensioned vertically. sill beam: horizontal structural members that connect the lower ends of two or more legs of a container-handling crane. slap block: a sacrificial protective device or guard to pro- tect the wire rope or other parts of the crane from rope contact. span: the horizontal distance, center to center, between runway rails or tire centers. spreader: a fixed or telescoping frame attached to the headblock that is used for lifting containers (see Fig. 3). stop, runway or trolley: a device to limit travel. This device normally is attached to a fixed structure and normally does not have energy-absorbing ability. switch: a device for making, breaking, or changing the connections in an electric, hydraulic, or pneumatic circuit. switch, emergency stop: a manually actuated switch to disconnect power independently of the regular operating controls. switch, limit: a device that is actuated by the motion of a part of a power-driven machine or equipment to alter ordisconnectthe electric, hydraulic,or pneumaticcircuit associated with the machine or equipment. switch, main (crane disconnect): a switch on the crane controlling the main power supply. switch, master: a switch that controls the operation of contactors, relays, or other remotely operated devices. switch, spring return: a switch that, when released, will return automatically to a neutral (off) position. torque proving: a feature that ensures sufficient motor torque is applied to the motor shaft prior to release of the brake(s) and the start of drive operation. trolley: the unit that travels on the trolley rails and sup- ports the load and lifting apparatus. truck: an assembly that includes a pivot, frame, axle(s), and wheels on which a crane rides on rails. twist-lock: alatchingdevice whose rotatable motionlocks or unlocks the spreader to an intermodal shipping container.

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