NCCCO Rigger case studies

NCCCO Rigger · Put your knowledge to work in context.

CCO Rigger certification is a nationally recognized, internationally accredited credential for the people who handle and move loads - iron workers, millwrights, electricians, mechanics, laborers, linemen, pipe fitters and others who rig as part of their trade. Two levels are offered. The NCCCO Rigger case studies are 5 cases and about 4,831 words.

Sling Returned to the Shack with a Kink, Birdcage, and a Bad Hook

You are the rigger on a night shift at a fabrication yard. A two-leg bridle built from 3/4-in, 6x37 IWRC wire rope slings comes back to the rigging shack after a lift.

892 words, about 4 min 2

Four-Leg Bridle on a Rigid Skid: The Per-Leg Number on the Plan Sheet Is Wrong

You are handed a lift plan for a 12,400 lb steel skid with four symmetric lifting lugs. The plan calls for a four-leg bridle of 3/4-in wire rope slings, each rated 8,000 lb in a vertical hitch and 6,000 lb in a choker.

850 words, about 4 min 3

Air-Handler Lift Beside an Excavation in Rising Wind

A 2,600 lb air-handling unit, 6 ft by 6 ft by 10 ft, sits on a flatbed. Its sheet metal casing gives it roughly 60 sq ft of sail area.

968 words, about 5 min 4

Chain Wear, a Side-Loaded Shackle, and a Missing Latch on a 5,200 lb Vessel

You are rigging a 5,200 lb vessel out of a shop. The available gear is a 3/8-in Grade 80 chain sling with a legible tag, to be used in a basket hitch under the vessel.

1,027 words, about 5 min 5

Shortening a Bridle Leg with a Bowline on a Pipe Bundle

You need to lift eight lengths of 6-in Schedule 40 pipe, 21 ft long, banded into one bundle with two steel bands, total weight 4,100 lb. Available gear is a two-leg bridle of 1/2-in wire rope slings, each 15 ft long, each rated 5,600 lb vertical and 4,200 lb choker, plus 200 ft of 3/4-in three-strand nylon rope.

1,094 words, about 5 min