TLL, TSS, LBC, LBT: Choosing the Right NCCCO Mobile Crane Designation

By Patrick SalazarSep 7, 2026Updated Oct 9, 202621 min read

NCCCO mobile crane designations are four codes on the cards and three you can test for. The title above lists four mobile crane codes. CCO now issues three. Lattice Boom Crawler (LBC) and Lattice Boom Truck (LBT) were folded into a single Lattice Boom Cranes designation (LAT) somewhere between the February 2021 and June 2023 editions of the candidate handbook, and the old codes now appear only on cards issued before the change. That detail matters because the three-letter code, not the phrase “NCCCO certified,” is what a general contractor’s prequal desk or an OSHA compliance officer actually reads. What follows is the current designation map, the machines each code legally covers, how CCO prices each one, the three clocks that make operators pay twice, and the testing order that keeps the money honest.

NCCCO mobile crane designations: four codes on the cards, three you can test for

CCO’s certification designation codes page is the authority here, and it is blunt: LBC and LBT are each marked “now LAT,” and LAT is defined as “Lattice Boom Cranes (includes LBC Crawler and LBT Truck).” The candidate handbook pulls friction cranes into LAT as well, defining a friction crane as a lattice boom crane whose only hoist and lower functions run through friction clutches and brakes. The consolidation was less dramatic than it sounds. In the February 2021 handbook the two lattice codes already shared a single Lattice Boom Cranes practical, taken on whichever carrier the candidate chose; what separated LBC from LBT was a pair of written specialty exams. What changed is the paper and the card. One LAT written specialty and one LAT practical now earn one designation that covers both carriers, so a crawler operator who later climbs into a lattice truck crane is not looking at a second exam of any kind.

The telescopic side did not change. TSS and TLL remain separate designations, each with its own specialty written exam and its own practical, and the line between them is drawn entirely by the operator’s station. CCO defines TSS as cranes “having a fixed (non-rotating) operator’s station” and TLL as cranes whose operator’s station “rotates with the crane’s upper works or turret of the boom,” a definition that explicitly sweeps in walk-around, platform and cab-operated boom trucks whenever the controls turn with the boom. The machine-spotting side of that question is covered in what counts as a swing cab crane, and the two telescopic cards are compared head to head in boom truck vs. rough terrain certification; this post does not repeat that ground.

Three other marks can still show up on a card you are checking. A “-SB” suffix meant a short boom restriction, earned by testing on a crane that did not meet CCO’s minimum boom configuration. An “-R” suffix meant a restricted certification limited to a 37-foot maximum boom, no jib or attachment, and a basic load chart. BTF was a boom-truck subcategory of TSS. CCO lists all three as no longer available, so a card that carries one is old enough to deserve a closer look at its expiration date. A “-SP” suffix is still live and means the written exams were taken in Spanish, which carries an OSHA obligation of its own that is covered further down.

What a designation costs to earn

Every mobile designation shares one Core written exam. CCO’s mobile crane operator overview and the current candidate handbook agree on its shape: multiple-choice, no calculator, with the question count and time limit set in the handbook. The Core itself is covered in the Core exam study plan. On top of the Core sits one specialty written exam per designation: calculator permitted, and weighted toward manufacturers’ load charts, which CCO puts at approximately 35 percent of the specialty paper. The specialty exams are short; check the current handbook for the question count and time limit before test day, because CCO’s web overview and handbook have not always matched. Each specialty carries only questions about its own machine family, so lattice boom assembly questions appear on the LAT paper and not on TLL or TSS.

Then comes one practical per designation, on a crane of that type. The course is the same six tasks for all three designations: a pre-operational inspection where you identify five items with about a minute each, placing the chain in the stop circle, following four hand signals from the examiner, placing the ball in two barrels, running the zigzag corridor with a test weight in both directions, and shutdown and securing. Telescoping is not permitted at any point because the boom length is pre-set, and an unsafe act ends the exam and bars you from any other practical that day. What the examiner is actually watching for is broken down in what examiners watch for on the practical. The part that differs by designation is the clock:

Those are optimum times from the handbook. Points come off gradually once you pass them, and at one-and-a-half times the optimum the examiner may end the task and move on. Task 3, the hand signals, is untimed. The fixed-cab course gets a full extra minute per direction on the corridor, which tells you something about how a boom truck handles a swinging load from a fixed seat and is one reason a TLL operator who has never run a fixed-cab machine should not assume the TSS practical is a formality.

CCO’s exam fee schedule is the only place to take the dollar figures from, and it changes on CCO’s calendar, not on any blog’s. What does not change is the shape of the bill. The mobile program is priced in three pieces: one fee for the Core written exam, one fee for each specialty written exam, and one fee for each practical exam. The Service Truck Crane program is priced as a single written exam plus a practical, with no Core fee at all, and a replacement card carries its own charge.

Run that structure before you build a budget. The first designation costs the Core plus one specialty written plus one practical. Every designation after the first costs a specialty written and a practical only, and that is true whether you add it in the same testing window or three years later, because a certified operator adding a designation does not retake the Core. The old advice that stacking saves you a second Core purchase is only true if you let a clock run out, and the clocks are covered below. What stacking actually saves is the day: the crane, the test site, the travel, the lost production, and the second calendar. Those costs are set by the employer and the test site, not by CCO, and the employer-side math is laid out in the NCCCO certification cost breakdown. One rule to keep in view when the invoice arrives: 29 CFR 1926.1427(c)(3) says that whenever operator certification is required under that section, the employer must provide it at no cost to the employee.

Which designation your fleet actually needs

Match the card to the iron the operator will sit in over the next five years, not to what is in the yard this morning. The decision is mechanical once you know the machine family and, for telescopics, where the operator’s station is.

1. Only fixed-cab boom trucks, carry decks and industrial cranes: TSS. The card arrives with STC printed on it automatically, so service truck cranes are covered without a separate exam. The fixed cab (TSS) certification page covers the class side.
2. Any rough-terrain, all-terrain or swing-cab truck crane, or a boom truck whose controls rotate with the boom: TLL. Those machines are outside the TSS definition regardless of capacity, and a rental swap is exactly how a fixed-cab operator ends up in a seat the card does not reach. Details on the swing cab (TLL) certification page.
3. Any lattice boom crane, crawler or truck-mounted: LAT. One practical on either carrier earns the one card that covers both. The crawler crane certification page is the entry point.
4. Service truck cranes and nothing larger: STC on its own. It is a single written exam and a five-task practical, with no Core, and its recertification practical is waived at 500 attested hours rather than the 1,000 the full mobile program requires. The trade-off is scope: CCO states plainly that STC “is intended only for operators of service truck cranes and not for those who operate larger Telescopic Boom—Fixed Cab” cranes. TSS covers STC; STC does not cover TSS. See service truck crane operator certification.
5. Knuckle-boom (articulating) cranes: a different CCO program entirely, with its own ABC, ABW and ABL written exams and its own practicals, and the same designations apply whether the crane is truck- or crawler-mounted. Nothing in the mobile program reaches them. Start at articulating crane certification.
6. Digger derricks: the Digger Derrick Operator (DDO) program, a written exam plus a practical. Whether Subpart CC applies at all depends on the work, since 1926.1400(c)(4) excludes digger derricks doing pole and Subpart V work; the boundaries are worked through in the digger derrick exemption explained.
7. A mixed telescopic fleet, or a rental habit: both TLL and TSS, ideally on the same test day.

That last line deserves a plain statement, because a lot of crews believe the swing-cab card is the “bigger” one, and an older version of the belief held that passing the TLL practical also satisfied the TSS practical. Neither appears anywhere CCO publishes today. The exam-requirements table in the current candidate handbook (cover revision 01/25) pairs each specialty written exam with a practical on that same crane type and lists exactly one designation earned per pair: Core plus the TLL written plus the TLL practical earns TLL, and nothing else. CCO’s practical exam page carries the same map, the swing-cab written exam corresponding to the swing-cab practical and the fixed-cab written to the fixed-cab practical, and the only cross-coverage CCO documents inside the mobile program runs from TSS down to STC. The same practical page lets a candidate test on “one, two, or all three of the crane types” inside one 12-month window, which is the mechanism for holding both telescopic cards. Treat TLL and TSS as two cards until CCO prints otherwise.

OSHA’s language points the same way. Under 29 CFR 1926.1427(d)(1)(ii)(B), an accredited testing organization must “provide certification based on equipment type, or type and capacity,” and paragraph (d)(2) adds that where no accredited exam exists for a particular type, the operator is deemed compliant if certified for the type that is most similar, with the certificate stating the type. Capacity is no longer part of the federal requirement. Operator certification has been mandatory since November 10, 2018; OSHA’s final rule published November 9, 2018 rewrote that paragraph to accept certification by type alone, and paragraph (k)(1) makes the rewritten section effective December 10, 2018. For equipment that does not map cleanly onto a CCO designation, CCO’s Crane Type Advisory Group publishes a directory of “most similar” certifications through the NCCCO Foundation, and that directory is the document to hand a compliance officer, not an argument. If the fleet also runs tower or overhead cranes, the wider map is in which NCCCO crane certification you need.

The three clocks that make operators pay twice

Most wasted exam fees trace back to one of three deadlines.

The 12-month exam window. Exams can be taken in any order, but from the day an operator passes the first exam in a designation, written or practical, the corresponding exams for that designation must be passed within 12 months. The handbook’s own example: pass the Core and TLL written in December 2024 and the TLL practical has to be passed by the end of December 2025. Any test passed inside a rolling 12-month period counts, and any test outside it is gone. CCO’s overview spells out the failure mode: Core in January, practical in June, specialty written not passed until February of the next year, and the Core has to be taken again while the practical still counts until the end of June. Extensions are considered for the practical exam only, take up to two weeks to process, and are “generally denied absent a showing of extraordinary circumstances.”

The 180-day practical authorization. Applying online for a practical produces an authorization code by email, and the operator has 180 days to use it. There are no extensions on the authorization, and the application cannot be cancelled, refunded or transferred to another candidate. A crew that applies before the test site has a date, or before the right crane is confirmed, is paying a practical exam fee for an authorization that will expire unused.

The four-week retake wait. A failed written exam cannot be retaken for four weeks unless CCO has an alternate form of that exam available. Written results are immediate, so the operator knows the same day; the calendar is what bites. For recertification candidates the wait is worse than an inconvenience, because a certificant who fails a written exam too close to expiration to sit again is required to take both the written and practical exams over as a new candidate.

A fourth rule is not a deadline but changes the arithmetic of adding designations. When a certified operator adds a mobile designation, the new one expires on the same date as the original card, no matter when in the five-year period it was earned. If the addition lands inside the final 24 months of the cycle, CCO exempts the new designation from recertifying at that expiration; after that, everything recertifies together in the 12 months before the shared date. In plain terms, a TSS added in year four of a TLL card is not a full five-year asset, it is a card that syncs to the older one.

The order that saves money

With the fees and the clocks in hand, the sequence mostly writes itself.

1. Certify for the seat the operator is in this quarter. 1926.1427(a) requires the operator to be trained, certified and evaluated before operating the equipment, and the designation has to match the type. The machine on this month’s schedule picks the first specialty; speculation picks nothing.
2. Add the second telescopic designation on the same practical event when the crane is there. The specialty written exams are registered together with the Core, and the second practical costs one more practical exam fee plus whatever the test site charges. What it saves is a second mobilization and a second calendar, and for a crew that swaps between rental rough terrains and its own boom trucks, that second card is not optional anyway.
3. Do not buy LAT until lattice is real. The LAT practical has to run on a lattice crane, crawler or truck, and staging one for a card nobody will use is the most expensive way to feel thorough. When a lattice job is actually booked, the good news is that one practical on whichever lattice machine is easier to stage covers both carriers.
4. Use the 1,000-hour attestation at recertification, and plan to earn it. Recertification means the same written exams as initial certification, taken in the 12 months before expiration; the practical is waived for operators who attest to at least 1,000 hours of crane-related experience during the certification period, and CCO defines that experience as operating, maintaining, inspecting or training on cranes. The attestation is a checkbox on the application, not a document, which is why an inspector may later ask how the hours were tracked. An operator moved off the cranes for most of a cycle will need a practical again, on the right type of machine, before the card expires. The windows and the lapse penalties are covered in NCCCO recertification deadlines.
5. Let dead designations die on purpose. A specialty the operator will not use in the next five years is a specialty written exam fee at every recertification, plus a practical on the right type of machine whenever the hours attestation cannot honestly be made. Drop it deliberately, in writing, rather than discovering the gap when a rental shows up.

One timing detail is worth building into the annual plan: recertifying inside the 12-month window starts the new five-year period from the original expiration date, so testing early costs nothing. Recertifying more than 12 months early starts the new period immediately and throws away the remainder of the old one.

What the card says to the people who check it

Whoever checks the card reads the designation first, the dates second, then looks it up. Cards issued in 2022 or later carry a QR code that opens the record in Verify CCO Online; older cards are checked by typing the seven-digit Candidate ID or the certification number. The tool is free, it returns every certification category the person holds from one number, and it cannot be searched by name. A printout from it is not proof of certification, and neither is a photocopy of the card; the check has to happen live. An added designation shows up in the system whether or not the operator paid for a new card. The step-by-step is in how to verify an NCCCO certification.

Two federal facts sit behind the card. A certification issued under 1926.1427(d) is portable among employers and valid for five years, and the certificate must state the type of equipment. And a card with an “-SP” suffix means the written exams were administered in Spanish, which 1926.1427(h)(2) allows on one condition: the operator “is only permitted to operate equipment that is furnished with materials required by this subpart, such as operations manuals and load charts, that are written in the language of the certification.” A Spanish-tested operator on a crane with English-only load charts is a citation waiting for an inspector who reads suffixes. More on the Spanish path in NCCCO en español.

The price of getting the match wrong is on OSHA’s penalties page: for violations assessed after January 15, 2026, the maximum is $16,550 per serious violation and $165,514 per willful or repeated violation. An operator running a swing-cab rough terrain on a TSS card is not certified for that equipment, and the citation lands on the employer who put them there.

The card is not the finish line

Certification is the middle step of OSHA’s three, and the rule says so directly: 1926.1427(f)(3) states that “possession of a certificate or degree cannot, by itself, cause a person to be qualified.” The employer still has to evaluate each operator on the equipment they will run, and the evaluation has to demonstrate skills specific to “the size and configuration of the equipment,” which the rule defines to include lifting capacity, boom length, attachments, luffing jib and counterweight set-up, plus the ability to perform the assigned hoisting work including blind lifts, personnel hoisting and multi-crane lifts where applicable. The evaluator must have the knowledge, training and experience to assess operators and must be an employee or agent of the employer. Once an operator passes, 1926.1427(f)(5) lets the employer put that operator on other equipment that it can show does not require substantially different skills, which is where the TLL-versus-TSS question returns from the evaluation side.

The documentation is short and specific: the operator’s name, the evaluator’s name and signature, the date, and the make, model and configuration of the equipment used, kept available at the worksite while the operator is employed. That requirement has been enforceable since February 7, 2019. CCO announced an Evaluator of Crane Operator certification for a January 2026 launch; as of September 2026 its program page lists a Core written exam and a specialty written exam in a mobile, tower or articulating track, no practical, and a candidate handbook still due in 2026. The program exists precisely because the rule never said how an evaluator becomes qualified. The gap between a valid card and a defensible evaluation, and how often it draws a citation, is the whole subject of the employer evaluation gap.

Riggers and signal persons carry different cards

The operator’s designation covers one seat on the lift. The people under the hook are qualified under separate rules that never mention CCO by name. 1926.1425(c)(3) requires materials to be rigged by a qualified rigger whenever workers are hooking, unhooking or guiding a load inside the fall zone, and 1926.1404(r)(1) requires the same for rigging the crane itself during assembly and disassembly. A qualified rigger, under 1926.1401, is simply a rigger who meets the definition of a qualified person, by credential or by knowledge, training and experience. There is no federal rigger card, and no operator card doubles as one.

Signal persons are stricter. 1926.1428 requires each signal person to pass an oral or written test and a practical test covering the signals in use, the Standard Method hand signals where used, and crane dynamics, and the documentation has to be on site and name each type of signaling covered. Option 1, a third-party qualified evaluator, produces a portable record; Option 2, the employer’s own evaluator, produces one that other employers cannot use. CCO’s Rigger Level I and II and Signalperson programs are one accepted way to build that paper; each is priced on CCO’s fee schedule as a written exam plus a practical, and the Signalperson program recertifies on a practical exam alone. The two rigger levels are compared in Rigger Level 1 vs. Level 2, and the signal side is at qualified signal person certification.

Frequently asked questions

Is rigger certification included with an NCCCO mobile crane operator card?

No. Rigger Level I, Rigger Level II and Signalperson are separate CCO programs with their own written and practical exams, and OSHA’s rigger and signal person requirements in 1926.1425, 1926.1404 and 1926.1428 are separate from the operator certification requirement in 1926.1427. An operator who also rigs needs to meet the qualified rigger definition on their own, and a crew that signals needs documented signal person qualification on site. Rigging and signaling certification is the cleanest way to produce that documentation, but it does not ride along with TSS, TLL or LAT.

What does “NCCCO certified” mean on a mobile crane operator’s card?

Less than most people assume. It means the operator passed the Core written exam, one or more specialty written exams and the matching practicals inside a 12-month window, and holds a five-year certification in the designations printed on the card. A TSS operator is not certified for a swing-cab crane, and no telescopic code touches lattice equipment. Check the code against the machine, then look the number up in Verify CCO Online.

Is CCO certification the same thing as NCCCO certification?

Yes. CCO and NCCCO are both registered marks of the National Commission for the Certification of Crane Operators, founded in 1995, and the organization now brands its credentials as CCO certification. A search for “NCCO certification” usually means the same thing with a letter dropped.

Does a swing cab crane certification (TLL) cover a fixed-cab boom truck?

Not according to anything CCO currently publishes. The handbook’s exam-requirements table earns TLL from the TLL written and TLL practical and TSS from the TSS written and TSS practical, and the only cross-coverage CCO documents is TSS to STC. An operator who runs both a rough terrain and a fixed-cab boom truck should hold both designations; the second one costs a specialty written exam and a practical in CCO fees, with no second Core, and can be done on the same test day. If the boom truck’s controls rotate with the boom, it falls under the TLL definition and the TLL card is the right one.

How much does NCCCO certification cost for the mobile crane designations?

Take the amounts from CCO’s exam fees page, which states its own effective date and is the only current source. The structure holds even when the numbers move: one Core written exam fee, then one specialty written exam fee and one practical exam fee for each designation, so the second and third designations skip the Core. Training, test-site charges, crane time and travel are separate and vary by provider. Where certification is required under 1926.1427, the employer pays.

Can you get mobile crane certification online?

The written exams, yes. CCO delivers the Core and specialty exams three ways, Online Proctored Testing, Test Center Testing and Event Online Testing, and results for all three are immediate. The practical cannot be online: it is run on a real crane of the designation’s type by a CCO-accredited practical examiner, on a standardized course adapted to that crane model. Anything sold as a fully online crane certification is not a CCO certification; see what can and cannot be done online.

Where do I find NCCCO certification near me?

Practical exams happen wherever an accredited test site has a crane and an examiner, and that includes employer sites that host their own testing, so “near me” usually means the machine is coming to you. Written exams are taken online or at a test center. CCO’s site lists open practical test sites and practical examiners for hire, and a provider that tests on your own equipment removes the travel line from the budget.

Do the LBC and LBT designations still exist?

Only on older cards. CCO’s designation codes page keeps both in its table, each marked “now LAT,” so a card issued before the change can still be read against the current list, and a single Lattice Boom Cranes designation now covers crawler and truck-mounted lattice cranes alike, with one written specialty and one practical taken on either carrier. Every current exam and every new card uses LAT.

Sort the designations against the fleet list before anyone books a practical, because the exam fee is the cheapest thing on the invoice and the wrong code is the most expensive.

Authoritative References

• OSHA 29 CFR 1926.1427 — operator training, certification, and evaluation, and the rule that certification must match the type and capacity of the crane.
• OSHA 29 CFR 1926.1428 — signal person qualification requirements.
• NCCCO Mobile Crane Operator certification overview — the designations, exam structure, and eligibility as the certifying body states them.
• NCCCO Mobile Crane Operator Candidate Handbook — the current candidate policies, exam content outlines, and practical exam specifications; confirm every detail here before booking.
• NCCCO exam fees — the current published fee schedule.
• NCCCO mobile crane practical exam — what the practical covers by designation.
• NCCCO certification card codes — how to read the designation codes printed on the card.
• OSHA penalties — current maximum penalty amounts, adjusted annually.

Sorting designations for a fleet? Call (252) 274-0583 or request a quote — we run NCCCO mobile crane certification training for every designation on your jobsite nationwide and OCONUS, or at our Goldsboro, NC crane operator school. Send the fleet list and we will map it to the cards before anyone books a practical.