Written Specialties and the Cranes They Cover
Every candidate takes the Core exam plus at least one specialty, then passes the matching practical.
| Written specialty | Practical designation(s) | Typical cranes |
|---|---|---|
| Lattice Boom Cranes (LAT) | LBC — Lattice Boom Crawler; LBT — Lattice Boom Truck | Crawler cranes, truck-mounted lattice cranes |
| Telescopic Boom — Swing Cab (TLL) | TLL | Rough-terrain, all-terrain and hydraulic truck cranes with a cab on the upper |
| Telescopic Boom — Fixed Cab (TSS) | TSS (also confers Service Truck Crane) | Boom trucks and other cranes operated from the carrier or a fixed station |
Eligibility, Exams and the 12-Month Clock
NCCCO's mobile program was developed by an industry task force of operators, users, trainers, safety professionals and manufacturers. To be eligible you must be at least 18, comply with CCO's substance abuse policy and code of ethics, and meet the physical requirements referenced in ASME B30.5 as described in the candidate handbook.
Written exams can be taken at a test center or through NCCCO's online proctored options, and you can take the written or the practical first. What matters is the window: once you pass any component, you have 12 months to pass the corresponding exams in the same designation. Anything that expires before the set is complete must be retaken.
Question counts and time limits are published in the Mobile Crane Operator candidate handbook on nccco.org; check the current edition rather than relying on figures you've seen elsewhere, since they're revised from time to time.
Certification Is Not Permission to Run Every Crane
A CCO card proves you passed accredited exams for a crane type. Before you work independently, OSHA still requires your employer to evaluate you on the specific equipment and document it. Until that happens, you may operate only as an operator-in-training under supervision. Plan for both the card and the evaluation when you change employers or move to a new crane.
OSHA operator requirements explained →Building Your CCO Mobile Crane Card
Choose your specialties
Match TLL, TSS or lattice to the cranes you'll run. Not sure? Our TSS and TLL training explains the split.
Study the Core thoroughly
Site setup, operations, technical knowledge and load chart use apply to every specialty — use our mobile crane course and practice exams.
Pass Core + specialty written
Register for both in the same session if you can, so the 12-month window starts together.
Pass the practical
Find equipment using our practical test site guide and review the practical checklist.
Get your employer evaluation
OSHA 1926.1427 requires the employer to evaluate you on the cranes you'll operate before you work independently.
Keeping NCCCO Mobile Crane Certification Current
Certification is valid for five years from the date it's granted
Complete recertification requirements in the 12 months before expiration
Designations added later are aligned to your existing expiration date
You can add a new specialty during recertification by taking the full exam for it
TSS holders also receive the Service Truck Crane (STC) designation
Replacement cards are ordered online from NCCCO for a fee