NCCCO Digger Derrick case studies
NCCCO Digger Derrick · Put your knowledge to work in context.
The NCCCO Digger Derrick Operator Certification is a credential for people who operate digger derricks - the truck-mounted machines that auger holes and set poles and other structures, most often in utility and line-construction work. It signals that an operator has demonstrated knowledge of safe setup, operation, and load handling to a certifying body's standard, and it is typically sought by apprentice and journey-level operators, crew leads, and employers who want documented competency before putting someone on a machine. The NCCCO Digger Derrick case studies are 5 cases and about 2,803 words.
1Outrigger Setup on Fill Beside an Open Trench
A three-axle digger derrick is staged in a new subdivision to set a 40 ft Class 4 pole. The rear lot line slopes about 8 percent toward a 6 ft deep foundation excavation.
583 words, about 3 min2Load Chart at Radius with a Pole and Crosswind
A crew is using a digger derrick with a 50 ft boom and stowed jib to lift a 42 ft, 2,900 lb treated pole. Rigging, slings, and a pole grab add 250 lb, so the suspended load is 3,150 lb.
561 words, about 3 min3Pre-Operation Inspection Findings on a High-Hour Derrick
During a morning pre-operation inspection, a 2012 digger derrick with 6,800 hours shows four findings. The winch wire rope has three broken wires in one lay near the lower sheave and a kink 4 ft from the drum.
556 words, about 3 min4Auger Stall and Hole Sloughing in Gravel Fill
A crew is boring a 9 ft deep, 24 in diameter hole for a 45 ft pole in compacted gravel fill over clay. The utility locate is current and marks an 8 in water main 9 ft away.
570 words, about 3 min5Boom Near a 12.5 kV Primary in a Rear Alley
A digger derrick is setting a pole in a rear alley. A 12.5 kV primary conductor runs overhead about 27 ft above grade and about 9 ft horizontally from the pole hole.
533 words, about 3 min