NCCCO - National Commission for the Certification of Crane Operators Lift Planning and Critical Lift Procedures 1 — Questions and Answers
Question 1: Under ASME B30.5, when two cranes are used to lift a single load in a tandem lift, at what threshold does the operation automatically qualify as a critical lift requiring a formal lift plan?
- When either crane exceeds 50% of its individual rated capacity for the shared load
- Tandem lifts are always classified as critical lifts regardless of the percentage of rated capacity used (Correct answer)
- When the combined load exceeds 75% of the total rated capacity of both cranes added together
- Only when the load exceeds the rated capacity of the larger of the two cranes
Correct answer: Tandem lifts are always classified as critical lifts regardless of the percentage of rated capacity used
ASME B30.5 and industry standards classify all tandem (multi-crane) lifts as critical lifts by definition, because the load-sharing dynamics between cranes introduce inherent complexity and risk regardless of what percentage of rated capacity each crane is using. A formal engineered lift plan is always mandatory.
Question 2: A lift plan must include an assessment of ground bearing pressure. Which of the following correctly describes what must be verified before positioning the crane?
- The ground bearing pressure under each outrigger pad must not exceed the manufacturer's rated outrigger load divided by the pad area, and this value must not exceed the site's allowable soil bearing capacity (Correct answer)
- Ground bearing pressure only needs to be assessed when the crane is operating on fill material or near excavations
- The crane's total weight must be less than the soil bearing capacity at the geometric center of the outrigger spread
- Ground bearing pressure is the responsibility of the civil engineer of record for the site and does not need to be included in the crane operator's lift plan
Correct answer: The ground bearing pressure under each outrigger pad must not exceed the manufacturer's rated outrigger load divided by the pad area, and this value must not exceed the site's allowable soil bearing capacity
Each outrigger pad transmits a concentrated load to the ground. The pressure (load divided by pad area) must be calculated for each pad individually and compared against the verified allowable soil bearing capacity at that specific location. This is a required element of any lift plan and is critical to preventing crane tip-over from ground failure.
Question 3: During lift plan development, the rigger calculates that the crane's maximum radius during the pick will be 42 feet. After reviewing the load chart, she determines the rated capacity at that radius is 28,000 lbs. The total lifted weight including rigging is 23,500 lbs. What is the percentage of rated capacity, and does this classify as a critical lift under common industry thresholds?
- 83.9% — this does not meet the typical 85% threshold and is not a critical lift
- 83.9% — this exceeds the typical 75% threshold and qualifies as a critical lift (Correct answer)
- 119.6% — the lift exceeds rated capacity and must not proceed
- 16.1% — the 16% margin means no additional planning is required
Correct answer: 83.9% — this exceeds the typical 75% threshold and qualifies as a critical lift
23,500 ÷ 28,000 = 83.9% of rated capacity. Most industry standards and employer programs classify lifts at or above 75% of rated capacity as critical lifts requiring a formal lift plan. ASME B30.5 and OSHA 1926.1431 both reference the 75% threshold as the common trigger, so this lift qualifies.
Question 4: A critical lift plan has been completed and approved. On the day of the lift, the site superintendent directs the crane operator to begin the pick before the scheduled pre-lift meeting has been held. What is the correct action for the crane operator?
- Begin the lift if the lift director verbally confirms all conditions match the lift plan
- Proceed with the lift since the approved lift plan is the controlling document and the meeting is administrative
- Refuse to begin the lift; the pre-lift meeting is a required step that must occur before any critical lift begins (Correct answer)
- Conduct a brief self-review of the lift plan and proceed if no discrepancies are found
Correct answer: Refuse to begin the lift; the pre-lift meeting is a required step that must occur before any critical lift begins
The pre-lift meeting is not an administrative formality — it is a required procedural step for critical lifts under ASME B30.5 and OSHA 1926.1431. All personnel involved must confirm roles, review the plan, and identify last-minute hazards before work begins. The crane operator has the authority and obligation to refuse to lift until this step is completed.
Question 5: A lift plan identifies a load path that passes over an active roadway. Which of the following is the most appropriate control measure to address this hazard?
- Increase the crane's rated capacity derating factor by 10% to provide additional margin over the roadway
- Temporarily close or control traffic in the load path for the duration of the lift, and document this measure in the lift plan (Correct answer)
- Shorten the boom length to reduce the time the load spends over the roadway
- Notify the crane's manufacturer so they can verify the load chart applies to over-roadway operations
Correct answer: Temporarily close or control traffic in the load path for the duration of the lift, and document this measure in the lift plan
Swinging or transporting a suspended load over an active roadway creates a hazard to the public that must be mitigated through traffic control — typically a temporary closure coordinated with the appropriate authority. This is a standard requirement under OSHA 1926.1425 and must be explicitly addressed in the lift plan as a documented engineering control.
Question 6: After a critical lift is completed successfully, how long must the written lift plan typically be retained according to standard industry recordkeeping practice and OSHA regulations for construction?
- The lift plan may be discarded once the lift director verifies the lift was completed without incident
- Lift plans must be retained for a minimum of 3 years after the lift is completed (Correct answer)
- Lift plans must be retained until the crane's next annual inspection
- There is no federal retention requirement; retention period is determined solely by the contractor's internal policy
Correct answer: Lift plans must be retained for a minimum of 3 years after the lift is completed
OSHA's general recordkeeping regulations and industry best practices require that critical lift plans and associated documentation be retained for a minimum of three years following completion of the lift. This retention window supports incident investigation, insurance documentation, and regulatory audit purposes.
NCCCO - National Commission for the Certification of Crane Operators Lift Planning and Critical Lift Procedures 1
Under ASME B30.5, when two cranes are used to lift a single load in a tandem lift, at what threshold does the operation automatically qualify as a critical lift requiring a formal lift plan?