Key constraint: The mobile crane’s jib must reach the top of the tower crane without exceeding 75% of its rated capacity—a legal margin in most jurisdictions.
Never remove more counterweight than specified before the jib is detached; doing so can cause a structural collapse due to the rear-heavy moment. Trapped Energy: tower crane dismantling method statement
The assist crane supports the weight of the jib as it is disconnected from the slewing unit. Once the main jib is safely on the ground, the counter-jib and the A-frame (or cat-head) are removed. Phase D: The Slewing Unit and Mast Key constraint: The mobile crane’s jib must reach
Establish a physical barrier around the radius of the crane and the loading area to prevent unauthorized access. Once the main jib is safely on the
Any ballast weights at the base are loaded onto transport trucks. 6. Safety & Environmental Controls
Any method statement must address these top hazards explicitly: