Operating Safely
1.5 hours
Learning Objectives
- •Apply safe setup procedures for boom truck lifts including ground assessment and outrigger deployment
- •Identify overhead hazard clearance requirements for boom trucks near power lines
- •Describe safe operating procedures for loader-backhoes and wheel loaders
- •Explain swing-radius exclusion zones and their enforcement
Topics Covered
- •Ground assessment before outrigger deployment: soil type, underground voids, pavement thickness
- •Overhead power line clearance: OSHA 1926.1408 — minimum 20 ft for lines up to 350 kV, greater for higher voltages
- •Utility location (Dig Safe / 811) before any ground disturbance
- •Swing-radius exclusion zones: 230 CMR 6.00 prohibits persons within full working radius during crane operations
- •Load path planning: plan the full lift path before picking the load
- •Tandem lifts: require separate written plan and both operators must communicate
- •Loader-backhoe travel: loader bucket low, backhoe bucket curled and raised slightly
- •Wheel loader bucket carry position: low for stability, raised only for dumping
- •Ramp and slope operations: load faces uphill when traveling with a load
- •Pedestrian awareness: maintain visibility and use spotters when backing
- •Weather restrictions: wind speed limits on load charts; ice and mud affect ground bearing
- •Refueling: engine off, no smoking, ground the fuel nozzle on metal to prevent static
- •Emergency procedures: lower load and shut down if structural, hydraulic, or electrical failure
Resources
Self-Check Questions
Question 1: OSHA 29 CFR 1926.1408 requires a minimum clearance of how many feet from energized power lines rated up to 350 kV when operating a boom truck?
- A. 10 feet
- B. 15 feet
- C. 20 feet(correct)
- D. 25 feet
Show Explanation
Explanation:
OSHA 1926.1408 sets the minimum clearance at 20 feet for lines up to 350 kV. This distance applies to the boom, load line, and load — not just the cab. When in doubt, contact the utility company and request a line de-energized or insulated before beginning work.
Question 2: You are operating a wheel loader on a ramp. You have a loaded bucket. In which direction should the load face?
- A. Load faces downhill to see where you are going
- B. Load faces uphill to keep weight over the drive axle and improve stability(correct)
- C. Direction does not matter on grades under 15%
- D. Load faces downhill so the bucket can be lowered quickly if needed
Show Explanation
Explanation:
With a loaded bucket on a ramp, always travel with the load facing uphill. This keeps the heavy end closer to the uphill slope, reducing the risk of tipping forward (over the load) if you stop suddenly or if a tire slips.
Question 3: Under 230 CMR 6.00, what must be true before the operator can swing a boom truck's superstructure during a lift?
- A. The site foreman must be watching
- B. The load must be less than 50% of rated capacity
- C. No persons may be within the full working radius of the machine(correct)
- D. The swing must be less than 90 degrees
Show Explanation
Explanation:
230 CMR 6.00 prohibits any persons within the full working radius during boom/load operations. The operator must confirm the area is clear before initiating any swing movement — no exceptions, regardless of load weight.
Question 4: Before setting up a boom truck on a paved surface (parking lot), what ground condition must you assess?
- A. Asphalt color and age only
- B. Pavement thickness and subgrade capacity — pavement can shear under outrigger point loads(correct)
- C. Whether the lot is marked as private property
- D. Distance to the nearest storm drain
Show Explanation
Explanation:
Asphalt pavement may look stable but can punch through under concentrated outrigger loads, especially over soft subgrade or underground voids (utilities, drainage). Outrigger pads spread the load, but you must still assess and potentially probe for subsurface conditions.
Question 5: When traveling a loader-backhoe on a job site between work areas, how should the machine be configured?
- A. Loader bucket raised to see over obstacles; backhoe bucket on the ground as a brake
- B. Loader bucket low (just above ground); backhoe bucket curled and raised slightly off the ground(correct)
- C. Both buckets raised to maximize ground clearance
- D. Loader bucket dumped open; backhoe at full extension for balance
Show Explanation
Explanation:
During travel the loader bucket should be in the low carry position (12–18 inches off ground) for stability, and the backhoe bucket should be curled and held slightly above ground to prevent dragging and to keep the center of gravity low.