Pre-Lift Planning & Inspections
2 hours
Learning Objectives
- •Conduct a thorough pre-shift inspection of a lattice-boom or truck crane per OSHA 1926.1412
- •Develop a lift plan that identifies load weight, load radius, boom configuration, and ground conditions
- •Explain the OSHA ground condition requirements of 1926.1402 and identify when additional ground support is needed
- •Define when a critical lift plan is required and who must develop it
Topics Covered
- •OSHA 1926.1412 pre-shift inspection: required before each shift by a competent person
- •Pre-shift checklist: control mechanisms, drive mechanisms, pressurized lines, hydraulic fluid, hooks and latches, wire ropes, electrical apparatus, ground conditions, equipment levelness, cab windows, safety devices
- •Monthly inspection: same as pre-shift plus documented records retained for three months (inspector name, signature, date)
- •Annual/periodic inspection: by a qualified person; includes structural members, bolts, fasteners, welds, sheaves, brake and clutch components
- •Lift planning sequence: (1) determine load weight, (2) determine load radius, (3) select boom configuration, (4) consult load chart, (5) verify ground conditions, (6) determine rigging
- •OSHA 1926.1402 ground conditions: firm, drained, and graded; supplemented by blocking, mats, cribbing, or similar materials as needed
- •Ground bearing pressure: the controlling entity must inform the operator of subsurface hazards — voids, tanks, utilities
- •Outrigger pad sizing: pad area = maximum outrigger load ÷ allowable soil bearing pressure
- •Crane levelness: follow manufacturer tolerance (typically ±1% of level); a crane out of level has reduced rated capacity and increased tipping risk
- •Critical lift definition under OSHA 1926.1432: any lift using multiple cranes, or when the operator or lift director determines the lift requires special procedures
- •Critical lift plan: developed by a qualified person; reviewed by a competent person; pre-lift meeting required with all involved workers
- •Exclusion zone: establish and maintain clear area around the crane equal to the maximum radius plus the load swing potential
- •Checking weather: wind affects load stability and boom structural limits — manufacturer charts include wind speed restrictions
Resources
Self-Check Questions
Question 1: Who is required to conduct the pre-shift inspection of a crane under OSHA 1926.1412?
- A. The crane operator, who may self-certify the inspection
- B. A competent person(correct)
- C. A qualified person with an engineering degree
- D. A third-party inspection company
Show Explanation
Explanation:
OSHA 1926.1412 requires pre-shift inspections to be conducted by a competent person — someone with the training and authority to identify unsafe conditions and take corrective action. The operator may be the competent person, but the key is that someone with that designation performs the check.
Question 2: Under OSHA 1926.1402, what must ground conditions be before assembling or using a crane?
- A. The ground must be level to within 1 degree
- B. Firm, drained, and graded sufficiently to support the equipment per manufacturer specifications(correct)
- C. The soil bearing capacity must exceed 3,000 psf as tested by an engineer
- D. A concrete pad must be poured if the soil is not bedrock
Show Explanation
Explanation:
OSHA 1926.1402 requires that ground conditions be firm, drained, and graded to meet the manufacturer's specifications. If natural ground does not meet the requirement, supporting materials such as blocking, mats, cribbing, or marsh buggies may be used to provide adequate support.
Question 3: Monthly crane inspections must be documented. How long must monthly inspection records be retained under OSHA 1926.1412?
- A. 30 days
- B. 3 months(correct)
- C. 6 months
- D. 1 year
Show Explanation
Explanation:
OSHA 1926.1412 requires monthly inspection records to be retained for three months. Records must include the items inspected, the results, the date of the inspection, and the inspector's name and signature.
Question 4: You are planning a lift and calculate that the maximum outrigger load on the critical corner will be 80,000 lbs. The soil has an allowable bearing pressure of 2,000 psf. What is the minimum outrigger pad area needed?
- A. 20 sq ft
- B. 40 sq ft(correct)
- C. 80 sq ft
- D. 160 sq ft
Show Explanation
Explanation:
Required pad area = load ÷ allowable bearing pressure. 80,000 lbs ÷ 2,000 lbs/sq ft = 40 sq ft minimum contact area. This is the load-spreading purpose of cribbing and outrigger pads — if the soil's bearing capacity is exceeded, it will fail and the crane will tip.
Question 5: Under OSHA 1926.1432, a critical lift plan involving multiple cranes must be developed by whom?
- A. The general contractor's project manager
- B. A qualified person(correct)
- C. Any crane operator with 5 years of experience
- D. OSHA must pre-approve the plan
Show Explanation
Explanation:
OSHA 1926.1432 requires the critical lift plan for multiple-crane/derrick lifts to be developed by a qualified person — someone with the knowledge, training, and experience necessary to solve problems related to the task. The plan must also be reviewed with all involved workers before the lift begins.
Question 6: During a lift plan review, you realize you do not know the exact weight of the load. What must you do before proceeding?
- A. Estimate the load at 90% of the crane's rated capacity and proceed conservatively
- B. Determine the actual load weight through recognized industry methods before lifting(correct)
- C. Lift slowly and watch the LMI — if it reads under 75% of capacity you may proceed
- D. Get a verbal estimate from the rigger and add a 10% safety margin
Show Explanation
Explanation:
OSHA 1926.1417 requires that the operator determine the load weight through recognized industry methods before lifting any load that appears to exceed 75% of rated capacity. You cannot safely select the correct crane configuration or verify you are within rated capacity without knowing the actual load weight.