Basic Rigging (RB) case studies
Basic Rigging (RB) · Put your knowledge to work in context.
The Basic Rigging (RB) credential is an entry-level certification for workers who attach loads to cranes, hoists, and other lifting equipment under supervision. It is typically pursued by construction laborers, millwrights, ironworkers, warehouse staff, and helpers moving into rigging roles, and it signals that a candidate understands safe hardware selection, hitch types, load control, and communication with operators. The exam is multiple choice and is organized around five domains: rigging safety and standards; rigging hardware and slings; knots, hitches, and sling configurations; load weight estimation and center of gravity; and lifting, moving, and hand signals. Expect questions that test practical judgment rather than pure recall - identifying the right sling for an edge, estimating a load from dimensions, or choosing a hitch that will not crush a bundle. The Basic Rigging (RB) case studies are 4 cases and about 2,062 words.
1Choosing a Sling for an Off-Center, Sharp-Edged Load
A crew must lift a 2,400 lb steel weldment from a truck bed to a floor 12 ft away. The weldment has two lifting eyes: one near the center of gravity (CG) and one 5 ft from the CG on a 6 ft-long part, so the load hangs noticeably tilted with a single pick point.
547 words, about 3 min2Two-Crane Tandem Lift of an Irregular Tank
Two 15-ton rough-terrain cranes must set a 9,000 lb fiberglass tank onto a foundation. The tank is 22 ft long with its CG marked 8 ft from the left end.
502 words, about 3 min3Estimating Weight and CG of a Fabricated Skid Without a Tag
A maintenance crew must lift a welded steel skid with no weight tag. The skid is a 10 ft × 4 ft base of 1/2 in.
508 words, about 3 min4Hand Signals and a Load That Will Not Seat
An operator is lowering a 3,000 lb precast panel onto dowels on a wall. The panel is 8 ft tall and the operator cannot see the dowels; a signal person stands at the wall edge with a clear view of both the panel and the operator.
505 words, about 3 min