NCCCO Lift Director case studies
NCCCO Lift Director · Put your knowledge to work in context.
The NCCCO Lift Director credential is a certification offered by CCO (the National Commission for the Certification of Crane Operators), an organization that has described itself as "Committed to Quality, Integrity, and Fairness in Testing since 1995." It is intended for the person on a lifting operation who is responsible for planning and directing the lift - coordinating the equipment, the rigging crew, the crane operator, and site conditions so that the lift is carried out safely. Candidates are typically experienced riggers, operators, supervisors, or site safety personnel moving into a planning and oversight role. The NCCCO Lift Director case studies are 5 cases and about 3,593 words.
1Outrigger Reaction Over Fill Next to an Open Trench
A 110-ton hydraulic truck crane is set on ground that was built up with 4 ft of compacted structural fill over natural clay. The geotechnical report gives an allowable bearing pressure of 2,000 psf and notes the fill was never engineered for concentrated loads.
605 words, about 3 min2Upending a Vessel: Load Share Changes With the Stage
A 47,000 lb horizontal vessel, rigging included, is to be upended and set on a foundation. The vessel is 58 ft long.
717 words, about 4 min3Boom Approach to a 69 kV Line on a Diagonal Swing
An 80-ton AT crane with 110 ft of main boom must set a 9,500 lb chiller onto a pad. Truck access forces a 70 ft pick radius.
734 words, about 4 min4An 87 Percent Lift on Ground That Is Out of Level
Company policy defines a critical lift as any lift at or above 75 percent of the crane's rated capacity. Today's load is a rooftop unit weighing 13,800 lb with 700 lb of rigging.
729 words, about 4 min5Four-Leg Bridle With a Damaged Chain and Unknown Sharing
A 14,000 lb welded steel skid is to be lifted by four corner lugs on a 10 ft square pattern. The plan is to hang the hook 7 ft above the lug plane when taut, using a 4-leg chain sling with 10 ft legs, which puts each leg at about 45 degrees from vertical.
808 words, about 4 min