Tower Crane Setup, Erection, Climbing, and Dismantling
Setup, Erection, Climbing, and Dismantling
This domain tests the sequence and control of assembling, climbing, and dismantling a tower crane. Questions focus on engineered foundations, component identification, pinning and torque, hydraulic climbing, tie-ins, wind limits, and role clarity.
Core rules
- Work only to the manufacturer's erection, climbing, and dismantling manual. The sequence is not interchangeable; ballast, mast sections, and tie-ins must match the configuration in the load chart.
- Verify foundation level and plumbness before adding mast. Record torque and pin retention; use locking pins and keep temporary pins controlled.
- Inspect the climbing unit before use: hydraulic pressure, hoses, guide rollers, wedges, and safety latches. Nobody stands under the climbing frame or on the moving mast section.
- Climbing is a hold point: stop if wind, visibility, or communication is outside the procedure. After climbing, install and torque structural pins, complete tie-ins, and recheck plumbness and limit settings.
- Dismantling is the reverse of erection but not a mirror image; load charts and stability change as components come off. Use the dismantling chart and keep specified ballast until the manual says otherwise.
- Only qualified and competent crew under a designated supervisor. Keep the area below closed.
Worked example
A crane climbs from 60 m to 80 m. Hydraulic pressure is in range and wind is 7 m/s, but the tie-in bracket at 70 m is not yet pinned. Reasoning: the crane is in an intermediate configuration not covered by the final chart. Stop climbing until the tie-in is complete and the manual or engineer confirms the intermediate wind limit. Do not "finish the last section" because the weather is calm.
Traps
- Leaving a pin out "until lunch" and forgetting it.
- Climbing with a load on the hook.
- Using a load chart for the pre-climb height.
- Reusing bent or mismatched mast pins.
- Removing ballast early during dismantling to speed the job.