ASME B30.8:2015 pdf free download – Floating Cranes and Floating Derricks
fiddle block: a type of tandem block consisting of two sheaves in the same plane held in place by the same cheek plates. floating crane: a rotating superstructure, power plant, operating machinery, and boom mounted on a barge or pontoon. The power plant may be installed below decks. The crane’s function is to handle loads at various radii. floating derrick: a mast or equivalent member held at the head by guys or braces, with or without a boom, for use with a hoisting mechanism and operating ropes, mounted on a barge or pontoon. The power plant may be installed below decks. foot bearingorblock(sill block): the lowersupportonwhich the derrick mast rotates. gantry (A-frame): a structural frame, extending above the superstructure, to which the boom support ropes are reeved. gudgeon pin: a pin connecting the mast cap to a derrick mast allowing rotation of the mast. guy, derrick: a rope used to steady or secure the mast or other member in the desired position. hoist mechanism: a hoist drum and rope reeving system used for lifting and lowering loads.
hook, latch-type: a type of hook with a mechanical device to close the throat opening of the hook. 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. land crane: a crane designed primarily for operation on land. liquid free surface: the unchecked movement of a liquid in a tank or compartment. This results in a virtual rise in the vertical center of gravity of the barge or pontoon and is detrimental to transverse stability. list: angle of inclination about longitudinal axis of barge or pontoon. list, machine: the inclination of the transverse centerline of the base of the crane or derrick from the horizontal. load, rated: the maximum allowable working load in pounds (kilograms) designated by the manufacturer in accordance with Section 8-1.1. load, working: the external load in pounds (kilograms) applied to the crane or derrick, including the weight of load-attaching equipment, such as load blocks, shackles, and slings. load block, lower: the assembly of hook or shackle, swivel, sheaves, pins, and frame suspended by the hoisting ropes. loadblock, upper: the assembly ofsheaves, pins, and frame attached to or suspended from the boom. load indicator: a device that measures the weight of the load. loadlines: horizontal lines painted on the side of a barge to indicate maximum drafts. mast (derrick): the upright member of the derrick used for support of the boom. mast cap (spider): the fitting at the top of the derrick mast to which the guys are connected. minimum breaking force: the minimum load at which a new and unused wire rope will break when loaded to destruction in direct tension. multiple sheave block: a block consisting of two or more sheaves held in place by the same cheek plates. normal operating conditions: conditions during which a crane orderrickis performingfunctions withinthe scope of the original or modified design.