Any ballast weights at the base are loaded onto transport trucks. 6. Safety & Environmental Controls
Only certified personnel should be involved in the dismantling process:
Slowly lower the main jib to the ground, using tag lines to steer it clear of the building facade. Disassemble it on the ground for transport. Step 5.5: Removal of the Counter-Jib
A strict drop zone, often calculated based on the height and reach of the crane components, must be barricaded.
Before commencing, it is imperative to review all relevant regulations. In the US, OSHA standards (specifically 29 CFR 1926 Subpart CC) govern the process. Under these provisions, the term "assembly/disassembly" is replaced by "erecting, climbing, and dismantling" for tower cranes. tower crane dismantling method statement
[Preparation & Positioning] │ ▼ [Telescoping Down (If Applicable)] │ ▼ [Counter-Weight Removal (Partial)] │ ▼ [Jib Removal & Lowering] │ ▼ [Remaining Counter-Weights Removal] │ ▼ [Counter-Jib Removal] │ ▼ [Tower Top / Apex Removal] │ ▼ [Slewing Ring & Cabin Removal] │ ▼ [Mast Section & Base Dismantling] Step 5.1: Telescoping Down (For High-Rise Cranes)
All team members must use a dedicated radio frequency.
The of the tower crane (e.g., Liebherr, Potain).
Verify valid calibration certificates for all lifting gear (slings, shackles, chains). Any ballast weights at the base are loaded
Dismantle the climbing cage assembly once it is reached in the sequence.
Deploy trained watchpersons to prevent unauthorized entry into the drop zone.
Sling and dismantle the jib in sections, often using the mobile crane to lower them to the ground.
Tirfor jacks or chain blocks for fine alignment during unpinning. 4. Pre-Dismantling Requirements & Site Preparation Disassemble it on the ground for transport
Responsible for operating the tower crane safely during its final self-dismantling steps (such as balancing the jib) until control is transferred entirely to the assist crane.
If removed fully, the assist crane takes the weight of the entire jib.
When all team members understand their roles and the exact sequence of events, the dismantling process is completed more efficiently and with fewer costly delays. Conclusion