NCCER Mobile Crane case studies
NCCER Mobile Crane · Put your knowledge to work in context.
The NCCER Mobile Crane Operator Certification is a crane, rigger and signal person credential offered by NCCER, which describes itself as "a 501(c)(3) nonprofit education foundation providing industry-recognized credentials" and states that it "was created in 1996 and is an independent 501(c)(3) nonprofit educational foundation." NCCER also describes its own role as "the nation's leader in providing construction industry education, assessments, credentials and accreditation." This page supports candidates preparing for that mobile crane operator credential, whether they are entering crane work, adding a certification to existing rigging or equipment experience, or renewing a lapsed credential for a jobsite requirement. The five domains weighted here are Mobile Crane Operation (site preparation, setup, inspection, operation, shutdown); Rigging and Load Handling; Load Charts and Capacity Calculations; Signaling and Communication; and Safety, Hazards and Jobsite Regulations. The NCCER Mobile Crane case studies are 5 cases and about 3,385 words.
1Outrigger on Trench Backfill
A 60-ton rough-terrain crane is set up on a gravel pad beside a 12 ft deep utility trench to set a 9,000 lb precast vault. The pad was recently backfilled over the trench and compacted with a plate compactor.
777 words, about 4 min2Offset Center of Gravity in a Two-Leg Bridle
An 8,000 lb steel skid is to be lifted from a truck bed with a two-leg bridle. The skid is 8 ft long between lifting eyes.
691 words, about 3 min3Rear Pick, Side Set, and Chart Deductions
A 100-ton all-terrain crane is set up with 120 ft of main boom, full outriggers, and 26,000 lb of counterweight. It must pick a 22,500 lb air-handling unit from a truck at a 45 ft radius over the rear and swing it 90 degrees to set it on a roof.
655 words, about 3 min4Conflicting Signals on a Blind Lift
A 70-ton telescopic crane is setting a 4,500 lb steel beam into a rack inside a pre-engineered building. The operator can see the boom tip but not the load below the roof line.
626 words, about 3 min5Energized Line and Wind Limit
A 50-ton rough-terrain crane is setting 6,000 lb steel columns beside a 12.5 kV overhead distribution line. The utility owner says the line is energized and will not be de-energized during the shift.
636 words, about 3 min