NCCCO Lift Director flashcards
NCCCO Lift Director · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Lift Director stop-work authority
- The Lift Director may halt any lift at any time for safety without seeking approval from the crane owner, site superintendent, or general contractor.
- Gross load calculation
- Gross load equals the weight of the load plus all rigging, the hook block, and any below-the-hook device. It must not exceed the chart capacity at the working radius.
- Working radius definition
- The horizontal distance from the crane's rotation center to the center of gravity of the load, measured with the boom in the planned configuration.
- Net capacity definition
- The published gross capacity from the load chart minus the weight of all lifting attachments such as the block, ball, slings, and spreader beam.
- Sling angle tension formula
- Tension per leg equals the load divided by the number of legs, then divided by the sine of the leg angle from horizontal. At 30 degrees, tension doubles.
- Choker hitch capacity
- A choker hitch reduces the sling's vertical rated capacity by a manufacturer-specified percentage, commonly around 75 to 80 percent, depending on sling type and choke angle.
- Basket hitch capacity
- A basket hitch can increase capacity over a vertical hitch when legs are vertical, but capacity decreases as the angle between legs widens.
- Center of gravity control
- The rigger locates the load's center of gravity and selects pick points so the load lifts level without unexpected rotation or tilt.
- Tag line purpose
- A tag line controls load rotation and drift. Handlers stay outside the fall zone and never wrap the line around a hand or body.
- Shock loading avoidance
- Slack is taken up slowly so the crane and rigging are not subjected to dynamic forces exceeding the static load used in the capacity calculation.
- Two-blocking hazard
- Two-blocking occurs when the hook block contacts the boom tip, damaging the crane and potentially dropping the load. Anti-two-block devices must be functional.
- Side loading prohibition
- Pulling or dragging a load sideways imposes forces the boom was not designed for and can cause structural failure. Side loading is not permitted.
- Power line clearance rule
- The crane and load must maintain the minimum required distance from energized lines. If that distance cannot be held, the line is de-energized and grounded.
- Wind limit determination
- The manufacturer's load chart wind speed governs, but the Lift Director also considers the load's sail area, which may require a lower limit than the crane's own rating.
- Ground bearing pressure check
- Outrigger or track reactions are compared to the soil's rated bearing capacity. Mats or cribbing spread the load over a larger area.
- Underground hazard assessment
- Voids, utility trenches, backfilled areas, slopes, and underground tanks can collapse under outrigger loads and must be identified before setup.
- Swing radius barricade
- The area the superstructure and load can reach must be barricaded to exclude non-essential personnel. Tail swing is a separate hazard from the load path.
- Pre-lift meeting purpose
- A documented meeting before the lift where the Lift Director reviews the plan, roles, signals, hazards, and emergency procedures with everyone involved.
- Critical lift criteria
- Employer or project criteria typically include loads over 75 percent of capacity, multiple cranes, personnel lifting, and lifts over occupied structures.
- Multi-crane load sharing
- Each crane's share depends on rigging geometry and the load's center of gravity, not simply half the load. Each crane must be rated for its share plus margin.
- Personnel platform trial lift
- Before lifting people, an approved platform is required, a trial lift is performed, and fall protection is verified for everyone in the platform.
- OSHA 29 CFR 1926 Subpart CC
- The federal construction standard for cranes and derricks. It addresses ground conditions, power line clearance, qualification of operators and riggers, and inspection.
- Qualified rigger verification
- The Lift Director confirms the rigger's qualification level matches the lift category, since critical lifts may require a certified rather than merely qualified rigger.
- Operator certification check
- The Lift Director verifies the operator's certification matches the crane type and capacity and that the operator is familiar with the specific model on site.
- Pre-shift inspection record
- The daily pre-shift inspection must be completed and documented before the crane is used. The Lift Director confirms the record exists.
- Load weight verification
- When the load weight is unknown, the Lift Director obtains a verified weight from shipping papers, a scale ticket, or a documented calculation rather than estimating.
- Lift plan deviation rule
- A longer radius, heavier load, softer ground, or higher wind invalidates the plan. Re-planning and re-authorization are required before the lift continues.
- Most protective requirement rule
- When OSHA, a state plan, the manufacturer's instructions, and site rules conflict, the requirement offering the greatest protection governs the lift.
- Below-the-hook device inspection
- Spreader beams, magnets, vacuum lifters, and clamps need current periodic inspections and a rated capacity at least equal to the load being lifted.
- Single signal person rule
- The Lift Director confirms one designated signal person, agreed signals or radio channel, and a tested emergency stop method before the lift begins.
- Outrigger configuration rule
- Load charts assume fully extended outriggers unless the chart states otherwise. Partial extension changes capacity and must be planned from the correct chart.
- Post-lift closeout duties
- After the lift, the load is secured, the rigging crew released, near misses logged, and the crane returned to a safe configuration.