A telescopic crane arrives on a job ready to work after setup. A lattice boom crane arrives on several trucks and has to be built: boom sections pinned together, pendants connected, counterweight installed, and in many cases a jib added. That difference shapes what lattice boom operators need to know, and it is why the NCCCO lattice boom specialty exams feel different from the telescopic ones.
The Two Lattice Boom Designations
NCCCO splits lattice boom mobile cranes into two specialties:
- LBC (Lattice Boom Crawler). Cranes on tracks. These are the machines you see on bridges, power plants, refineries and large structural jobs, often moving around the site with or without a load.
- LBT (Lattice Boom Truck). Lattice booms mounted on a rubber-tired truck carrier. They travel on public roads between jobs and set up on outriggers.
Both are taken alongside the NCCCO mobile crane core exam, and each has its own practical exam. Our article on the difference between LBT and LBC goes deeper into the machines themselves. Always confirm the current exam structure in NCCCO's Candidate Handbook.
Topics That Set Lattice Boom Exams Apart
Assembly and disassembly
More lattice boom accidents happen during assembly and disassembly than many operators expect. OSHA addresses this work in 29 CFR 1926.1403 and 1926.1404, which require procedures, a qualified A/D (assembly/disassembly) director and attention to hazards such as unsupported boom sections and pin removal. Expect questions on:
- Why you never stand under or inside a boom section when removing pins
- Blocking and supporting sections before pins come out
- The correct order for installing inserts and pendants
- Who is responsible for supervising the work
Pendants, boom inserts and configurations
A lattice boom's capacity depends on the exact combination of base section, inserts and tip. Each configuration has its own chart, and the wrong pendant length or a missing insert changes everything. Candidates need to identify the configuration from a description and pick the matching chart.
Jibs and auxiliary heads
Fixed jibs, luffing jibs and auxiliary sheaves (rooster sheaves) add reach and complexity. Exam questions often ask what must be deducted from main-boom capacity when a jib is attached but not in use, or which chart governs a lift on the jib.
Crawler travel and ground conditions
For LBC candidates, ground bearing pressure is a major theme. Crawlers distribute weight through their tracks, but that load shifts toward one end when the boom swings over the front or rear. Mats, compacted fill and ground slope all matter, and many charts restrict pick-and-carry operations to specific conditions such as boom over the front, firm level ground and slow travel speed.
Wind and long booms
Long lattice booms catch wind, both on the boom and on large loads. Expect questions about manufacturer wind limits, when to lower the boom and how wind affects load control.
Reading Lattice Boom Load Charts
Lattice boom charts tend to be longer and more conditional than telescopic charts. A structured approach helps:
- Confirm the configuration. Boom length, jib length and offset, counterweight, and whether the crawlers are extended.
- Find the radius line. Do not interpolate unless the chart notes allow it; normally you use the next longer radius.
- Read gross capacity. Watch for shaded areas or footnotes that indicate structural limits or restricted zones.
- Apply deductions. Hook blocks, overhaul balls, slings, spreader bars, and any attached but unused jib.
- Check the operating area. Some capacities apply only over the front or over the side.
Practicing with real charts is the best preparation. Our CCO practice tests include chart problems so you can drill this routine until it is automatic.
Is Online Prep Enough?
Online study handles the written side well. Lessons, practice questions and chart work can all be done at home, at your own pace, without leaving the job. What online study cannot do is put you in the seat. The practical exam requires smooth, controlled operation of a real lattice boom crane, and the only way to build that is hours on the machine.
The usual path for working operators looks like this:
- Study the core and LBC or LBT material online until practice scores are consistently strong.
- Take the written exams at a test center.
- Arrange seat time with your employer, a union program or a hands-on facility.
- Book and pass the practical exam. Our directory of CCO practical test sites can help.
Our Lattice Boom Prep Options
The Online Crane School offers self-paced written-exam prep for lattice boom candidates:
- The lattice boom crane training course covers assembly, configurations, charts and safe operation.
- The LBT and LBC exam prep page focuses on the two NCCCO specialties side by side.
- The Lattice Boom Crane prep product in our store is the direct enrollment option.
None of these replace the official exams. NCCCO issues certification only after you pass its written and practical tests.
Other Certifying Bodies
NCCCO is not the only accredited option. CIC and OECP also certify lattice boom operators, and some employers or regions prefer one over another. See our overviews of CIC lattice boom certification and OECP lattice boom certification if you want to compare.
After Certification
A lattice boom card often opens doors to heavy civil, industrial and energy work, where long booms and crawler cranes are standard. Many operators later add Rigger Level II, Signalperson or Lift Director credentials as their responsibilities grow. Remember that NCCCO certifications are valid for five years, so plan your recertification well before the expiration date on your card.