NCCCO Mobile Crane case studies
NCCCO Mobile Crane · Put your knowledge to work in context.
NCCCO Mobile Crane Operator certification is a professional credential for people who run telescopic boom and lattice boom mobile cranes on construction, industrial, and utility sites. It is issued by the National Commission for the Certification of Crane Operators (NCCCO). This page is an independent study resource and is not affiliated with, endorsed by, or sponsored by NCCCO - always confirm current requirements in the official candidate handbook. The credential has two parts. The NCCCO Mobile Crane case studies are 5 cases and about 3,647 words.
1Outrigger on Fresh Backfill Over a Trench
A 50-ton rough-terrain crane will set a 9,000 lb rooftop unit at a 40 ft radius, over the side. The outrigger float (a 24 in.
819 words, about 4 min2Mid-Span Outriggers and a Chart That Does Not Apply
A 60-ton all-terrain crane must set an 18,000 lb generator at a 45 ft radius, over the front of the carrier. The only setup spot is a 14 ft wide driveway.
667 words, about 3 min3Blind Lift, Radio Failure, and a Signal You Did Not Expect
A 35-ton all-terrain crane is placing a 6,500 lb air handler on a roof. To land it, the load must pass over a 20 ft parapet, after which the operator cannot see it from the cab.
708 words, about 4 min4Two Radii, One Chart, and a Margin That Is Not There
A 100-ton all-terrain crane is rigged with 42.5 ft of main boom on full outriggers, using the 360° chart. With the load hanging at the pick point, the load line measures 30 ft from the rotation center; the chart at 30 ft reads 43,000 lb.
748 words, about 4 min5End-of-Shift Pressure, an Overdue Inspection, and an Unqualified Signalperson
A superintendent wants a 12,000 lb pump skid set at a 55 ft radius. In the crane's current configuration the chart allows 11,200 lb at 55 ft after all deductions.
705 words, about 4 min