Definitions Flashcards
The wire rope live line that is reeved over the auxiliary boom head or jib (extension, fly, etc.)
Auxiliary line (wire rope)
These separate the whip line (auxiliary line) and the main hoist load line. Usually attached to the end of the main boom to separate load lines and used in the place of a jib.
Auxiliary boom head (Rooster sheave, auxiliary boom point sheave, hammer head, etc.)
Preferably hard wood or like material used to aid in elevation changes of an outrigger float, placed on top of cribbing.
Blocking
Normally a running wire rope used as the boom hoist line on a lattice boom crane, run from the rear of the boom mast (gantry or strut) to a drum controlled by the operator from inside the crane cab. Many consist of many parts of line in a reeving system to move the boom up or down.
Boom backstay
Almost always a standing pendant line or rod used to support the main boom from the boom mast (gantry or strut) to the boom tip.
Boom forestay
A lever used to aid in the up and down movement of the main boom, normally mounted near the boom heel pin. The boom forestay is attached to the front of the mast and the boom backstay is attached to the rear of the mast.
Boom mast
A hard wood or other strong material used as a tool to displace weight and provide support to a crane using outriggers.
Cribbing
A lifting attachment with a hook similar to a standard lift hook, only supported by one part of wire rope with an additional purpose of aiding the wire rope in unspooling evenly, preventing nesting on the wire rope drum.
Headache ball
A jib, that the angle of offset can be controlled by the operator from inside the cab via jib reeving.
Luffing jib
An extension which adds height to a main boom. Can be either a mechanically mounted or luffing. When not in use on many cranes, it is stowed on the side of the main boom. It can be fixed length extension or a telescopic extension.
Jib (extension, fly)
Normally a running wire rope used as the jib hoist line on mobile boom crane (lattice or telescopic), run from the rear of the jib mast (gantry or strut) to a drum controlled by the operator from inside the cab. May consist of many parts of line in a reeving system to change the angle of offset to the jib.
Jib backstay
Almost always a standing/pendant line or rod used to support the jib from the jib mast (gantry or strut) to the jib tip. This line should always be under tension.
Jib forestay
A lever used to aid in the up and down movement of the luffing jib, normally mounted near the boom tip sheave pin area. The jib forestay is attached to the front of the mast and the jib backstay is attached to the rear of the mast. Occasionally, a fixed jib could be mounted using a jib reeving system where both the forestay and backstay are standing/pendant lines.
Jib mast (gantry or strut)
Also referred to as the main boom hoist line, is the reeved live line coming off the main boom sheaves and used to hoist loads with the main boom.
Main line
Extendable arms extending out of the carrier, with stabilizers attached to floats, used to extend down to the cribbing/blocking to relieve the crane’s weight off the tires. Also used to change leverage and stability, and to move the tipping fulcrum. Consist of beam, jacks, and pads/floats.
Outriggers
Odd lines terminate at the hook and even numbered lines terminate at the boom tip.
Reeving
The point in which a crane will tip on either outriggers or crawlers, based on the location of the load, which quadrant of operation the pad is in and outrigger, stabilizer, or crawler position.
Tipping fulcrum
An individual who meets the subpart’s requirements for A/D Director, irrespective of the person’s formal job title or whether the person is non management or management personnel.
A/D Director
A crane whose boom consists of a series of folding, pin connected structural members, typically manipulated to extend or retract by power from hydraulic cylinders.
Articulating Crane
A crane used to assist in assembling or disassembling a crane.
Assist crane
Any device that expands the range of tasks that can be done by the equipment (i.e. auger, drill , magnet, pile-driver, boom-attached personnel platform).
Attachments
A signal made by a distinct sound or series of sounds (i.e. bell, horn, whistle)
Audible signal
Device which measures the angle of the boom relative to horizontal.
Boom angle indicator
Includes boom hoist disengaging device, boom hoist shut-off, boom hoist disconnect, boom hoist hydraulic relief, boom hoist kick-outs, automatic boom stop device, or derricking limiter. This disengages boom hoist power when the boom reaches a predetermined operating angle, and sets brakes or closes valves to prevent the boom from lowering after power is disengaged.
Boom hoist limiting device
Indicated the length of the permanent part of the boom (such as ruled markings on the boom) or, as in some computerized systems, the length of the boom with extensions/attachments.
Boom length indicator
Equipment designed by the manufacturer (or employer) for marine use by permanent attachment to a barge, pontoons, vessel or other means of flotation.
Floating cranes/derricks
Angle of inclination about the longitudinal axis of a barge, pontoons, vessel or other means of flotation.
List
The object(s) being hoisted and/or the weight of the object(s).
Load
A fixed length of wire rope or bar with mechanical fittings at both ends for pinning segments of wire rope together. Typically used in latticed boom crane systems to easily change the length of the boom suspension system without completely changing the rope on the drum when the boom is increased or decreased.
Pendants
Maximum working load permitted by the manufacturer under specified working conditions. Such working conditions typically include a specific combination of factors such as equipment configuration, radii, boom length, and other parameters.
Rated capacity
The revolving frame of equipment on which the operating machinery (and many cases the engine) are mounted along with the operators cab.
Upperworks
Maximum weight a crane can lift (including all capacity deductions) given by the manufacturer for each configuration (Chart or Line pull)
Gross Capacity
Weight of each component the manufacturer requires to be deducted from its Rated/Gross Capacity (block, ball, rigging, etc.)
Capacity Deductions
Rated/Gross Capacity minus deductions
Net Capacity
Gross load minus capacity deductions (actual weight of the load to be lifted)
Net load
Combined actual weight of the load to be lifted and the weight of all capacity deductions.
Gross load
Horizontal distance from center or axis of rotation to the center of gravity of the suspended load.
Radius
Center of the boom foot pin to the center of the head sheave pin.
Boom Length Lattice Measurement
The weight the manufacturer determines must be used as a capacity deduction (ABPS, Jib, Extension, etc.). May be less or more than actual weight.
Effective weight
System that will stall when two-blocking occurs without causing damage to the hoist rope or crane machinery components (ASME B30.5-0.2)
Anti two-block damage prevention feature
Warning device to alert the operator of an impending two-blocking condition (ASME B30.5-0.2)
Anti two-block device
Amount of weight a drum will hoist for a given layer (decreases as layers increase).
Line Pull
Positioned directly above the load’s center of gravity.
Load block position
Required every 3 years
ASME B30.5 Physical Examination Requirements
