NCCCO Lift Director key terms

The person who directs crane or rigging operations at a site, with authority to control the lift plan, the crew, and the work area for the duration of the lift.

A written document prepared before a lift that identifies the load, crane, rigging, personnel, hazards, and step-by-step sequence, and that is reviewed with everyone involved in the operation.

A lift that exceeds routine criteria, such as a load above a set percentage of the crane's capacity, multiple cranes, personnel aloft, or high-consequence hazards, and that requires a more detailed plan and approval.

The manufacturer's table or graph that gives the rated capacity of a crane for a given boom length, radius, and configuration, subject to notes and footnotes that must also be followed.

The maximum load a crane may handle at a specific configuration and radius, as published in the load chart, before any deductions for attachments or site conditions.

The load a crane can actually handle after deducting the weight of rigging, attachments, and other items that count against the rated capacity for that configuration.

The total weight being lifted, made up of the load itself plus all rigging, slings, shackles, spreader beams, and any other gear suspended below the hook.

The horizontal distance from the crane's center of rotation to the center of gravity of the suspended load, measured with the boom at the working position.

A measure of the turning effect of a load about a point, calculated as load weight multiplied by radius, used to compare a lift against the crane's capacity limits.

An instrument that senses boom angle, length, and load, and warns or stops the operator when the lift approaches the crane's rated capacity for the current configuration.

A safety device that prevents the load block from being pulled into the boom tip by interrupting the hoist function before the two blocks contact each other.

A retractable beam extended from the crane carrier to widen the support base and transfer load to the ground, whose full extension and float condition must be verified before lifting.

The pressure a crane's outrigger or track imposes on the soil or structure beneath it, which must be checked against the ground's capacity and spread with mats or cribbing if needed.

Placing timber, steel plates, or engineered pads under outriggers or tracks to spread the load over a larger area and reduce ground bearing pressure.

The process of positioning, leveling, and stabilizing a crane, including outrigger deployment, matting, and verification of clearances, before any lift begins.

The area swept by the crane's counterweight, boom, and load as the upper works rotates, which must be kept clear of people and obstructions during operation.

The distance the crane's counterweight extends behind the center of rotation as the upper works swings, a hazard to people and structures in that path.

A designated area around the lift where entry is restricted to authorized personnel, marked and enforced by the Lift Director to keep people clear of suspended loads and swing paths.

An area beneath or near a suspended load or energized line that no person may enter except as required for the work, established by barriers, marking, or attendants.

A person who, by possession of a recognized degree, certificate, or professional standing, or by extensive knowledge and experience, can select and use rigging gear and solve rigging problems.

A person who meets the employer's qualification requirements and is competent to give crane signals, including hand, voice, or radio signals, to the operator.

A set of agreed hand and arm movements used to direct crane operations, which must be understood by the operator and signal person before work starts.

Voice direction of crane operations over a dedicated channel, requiring clear protocols, identification, and a backup signal method in case the link fails.

A lift in which the operator cannot see the load or the landing area, requiring a signal person or other means to relay direction throughout the move.

The shackles, hooks, links, swivels, and other fittings that connect the load to the slings and hoist line, each with a rated capacity and inspection requirement.

The angle between a sling leg and the horizontal, which determines the tension in that leg; flatter angles increase tension and reduce the load a sling assembly can safely carry.

The maximum load a sling or sling assembly may carry in a given configuration, adjusted for the number of legs, the angle, and the type of hitch used.

The method of attaching a sling to a load, such as vertical, choker, basket, or bridle, each of which changes the sling's capacity and the way load is distributed.

The pulling force carried by each sling leg, which increases as the sling angle becomes flatter and which must not exceed the leg's rated capacity.

The point at which the weight of an object is considered to act; the load must be rigged so that this point is directly below the hook to avoid tipping or shifting.

A rope attached to a load so a worker can control rotation and sway from a safe distance, keeping hands off the load and out of pinch zones.

The closest a crane, load, or rigging may come to an energized power line, set by the line's voltage and required to be maintained unless the line is de-energized and grounded.

An event in which the crane or load touches an energized conductor, which requires immediate emergency response, area control, and notification of the utility.

A lift in which two or more cranes share a load, requiring a detailed plan that assigns capacity, movement, and communication responsibilities to each operator.

The portion of a shared load that each crane in a tandem lift carries, which must be planned so no crane exceeds its rated capacity as the load moves.

A briefing held before the lift in which the Lift Director reviews the plan, roles, signals, hazards, and emergency procedures with the entire crew.

A structured review that breaks a task into steps and identifies hazards and controls for each step, used to support lift planning and crew briefing.

The process of identifying hazards, judging their likelihood and severity, and deciding on controls before and during a lifting operation.

A test load applied to rigging or a lifting device to verify its strength and condition, typically at a specified multiple of its rated capacity.