ASME B30.8:2020 pdf download

ASME B30.8:2020 pdf download Floating Cranes and Floating Derricks Safety Standard for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings
fiddle block: a type of tandem block consisting of twosheaves in the same plane held in place by the samecheek plates.
floating crane: a rotating superstructure, power plant,operating machinery, and boom mounted on a bargeor pontoon.The power plant may be installed belowdecks. The crane’s function is to handle loads atvarious radii.
floating derrick: a mast or equivalent member held at thehead by guys or braces, with or without a boom, for usewith a hoisting mechanism and operating ropes, mountedon a barge or pontoon.The power plant may be installedbelow decks.
foot bearing or block (sill block): the lower support onwhich the derrick mast rotates.
gantry (A-frame): a structural frame, extending above thesuperstructure, to which the boom support ropes arereeved.
gudgeon pin: a pin connecting the mast cap to a derrickmast allowing rotation of the mast.
guy, derrick: a rope used to steady or secure the mast orother member in the desired position.
hoist mechanism: a hoist drum and rope reeving systemused for lifting and lowering loads.
hook,latch-type: a type of hook with a mechanicaldevice toclose the throat opening of the hook.
jib: an extension attached to the boom point to provideadded boom length for lifting specified loads. The jibmay be in line with the boom or offset to variousangles in the vertical plane of the boom.
land crane: a crane designed primarily for operation onland.
liquid free surface:the unchecked movement ofa liquid in atank or compartment. This results in a virtual rise in thevertical center of gravity of the barge or pontoon and isdetrimental to transverse stability.
list: angle of inclination about longitudinal axis of barge orpontoon.
list, machine: the inclination of the transverse centerline ofthe base of the crane or derrick from the horizontal.load,rated: the maximum allowable working load inpounds (kilograms) designated by the manufacturer inaccordance with Section 8-1.1.
load, working: the external load in pounds (kilograms)applied to the crane or derrick, including the weight ofload-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.load block, upper: the assembly of sheaves, pins,and frameattached to or suspended from the boom.
load indicator: a device that measures the weight of theload.
loadlines: horizontal lines painted on the side of a barge toindicate maximum drafts.
mast (derricky: the upright member of the derrick used forsupport of the boom.
mast cap (spiderJ: the fitting at the top of the derrick mastto which the guys are connected.
minimun breaking force: the minimum load at which anew and unused wire rope will break when loaded todestruction in direct tension.
multiple sheave block: a block consisting of two or moresheaves held in place by the same cheek plates.
norrnal operating conditions: conditions during which acrane or derrick is performing functions within thescope of the original or modified design. Under theseconditions, the operator is at the operating controldevices.
operational aid: an accessory that provides information tofacilitate operation of a crane or derrick or that takescontrol of particular functions without action of theoperator when a limiting condition is sensed. Examplesof such devices include, but are not limited to, thefollowing: anti-two-block device, rated capacity indicator,rated capacity (load) limiter, boom angle or radius indi-cator, lattice boom hoist disconnect device, boom lengthindicator, crane level indicator, drum rotation indicator,load indicator, and wind speed indicator.
pawl (dog): a device for positively holding a memberagainst motion in one or more directions.
pin, boom foot: the pin connecting the foot of the boom tothe boom seat or superstructure.
pitch diameter: the diameter of a sheave or rope drummeasured at the centerline of the rope.
qualified person: a person who, by possession of a recog-nized degree in an applicable field or certificate of profes-sional standing, or who, by extensive knowledge, training.and experience, has successfully demonstrated the abilityto solve or resolve problems relating to the subject matterand work.
rated capacity indicator: a device thatautomatically moni-tors radius,load weight,and load rating and warns thecrane operator of an overload condition.
rated capacity (load) limiter: a device that automaticallymonitors radius,load weight,and load rating and preventsmovements of the crane, which would result in an over-load condition.
radius (reach): the horizontal distance from the theore-tical intersection of the axis of rotation and the waterlineto the center of the hoist line(s) at the waterline (seeFigure 8-0.2-1).