A clear chain of command is non-negotiable.
| Role | Responsibility | |-------|----------------| | Appointed Person (AP) | Plans the entire operation; holds legal authority to stop work. | | Crane Supervisor | Directs the dismantling crew and coordinates communication. | | Competent Crane Operator | Operates the tower crane during initial lowering steps (if applicable) or operates the mobile crane. | | Riggers / Dogmen | Attach slings, guide loads, and signal movements. | | Bankman | Ensures ground exclusion zone is maintained. | | Safety Officer | Monitors compliance with method statement and intervenes on hazards. |
Approval signatures:
| Role | Name | Signature | Date | |------|------|-----------|------| | Appointed Person | | | | | Site Manager | | | | | Safety Officer | | | |
Note to user: This is a template. Always follow the crane manufacturer’s specific dismantling procedure and ensure the mobile crane’s capacity and set-up are verified by a competent lifting engineer. Do not rely on memory – use a checklist during each step.
A Tower Crane Dismantling Method Statement is a critical safety document that outlines the step-by-step procedure for removing a crane from a construction site.
Below is a standard framework for this document. Note: This must be tailored to the specific crane model, site constraints, and local safety regulations by a qualified engineer. 1. Project Overview & Scope Project Name/Location: [Insert Details]
Crane Specifications: Make, model, jib length, and current height under hook.
Objective: To safely decommission and remove the tower crane using a mobile assist crane. 2. Personnel & Responsibilities
Appointed Person (AP): Responsible for the lift plan and overall management. Crane Supervisor: Oversees the dismantling team on-site.
Slinger/Signallers: Responsible for attaching loads and directing the assist crane.
Crane Technicians/Erectors: Skilled team performing the mechanical disassembly. 3. Equipment & Tools
Assist Crane: [Insert Capacity, e.g., 200-ton Mobile Crane] with sufficient boom length.
Hand Tools: Torque wrenches, impact drivers, drift pins, and sledgehammers.
Safety Gear: Full-body harnesses, fall arrest lanyards, radios, and standard PPE (Hard hats, boots, hi-vis). 4. Pre-Dismantling Requirements tower crane dismantling method statement
Exclusion Zone: Establish a physical barrier around the radius of the crane and the loading area to prevent unauthorized access.
Weather Check: Confirm wind speeds are below the manufacturer’s limit for dismantling (typically <10 m/s).
Ground Conditions: Verify the mobile crane standing area is compacted and capable of bearing the outrigger loads. 5. Step-by-Step Dismantling Procedure Phase A: Preparation
Position the mobile assist crane and set outriggers on spreader mats.
Trolley the tower crane to the minimum radius and engage the slew lock.
Disconnect the main power supply and switch to the assist crane’s auxiliary power if required. Phase B: Counterweights & Jib
Counter-Jib Weights: Remove the specified number of counterweight blocks as per the manufacturer's manual to maintain balance.
The Jib: Attach the assist crane to the jib at designated lifting points. Remove pins and lower the jib to the ground for further disassembly.
The Counter-Jib: Remove the remaining counterweights, then rig and lower the counter-jib. Phase C: Tower Head & Cab
Rig the tower head/apex and disconnect it from the slewing ring. Lower to the transport vehicle. Disconnect and lower the operator’s cabin. Phase D: Slewing Assembly & Tower Sections Unbolt the slewing ring/gear assembly and lower it.
Systematically unbolt and remove tower sections (masts) one by one. If a climbing frame was used, dismantle and lower it last. 6. Safety & Environmental Controls
Fall Protection: 100% tie-off policy for all technicians working at height.
Communication: Dedicated radio channel for the lead signaller and mobile crane operator.
Waste Management: Ensure no hydraulic fluids leak during hose disconnection; use drip trays where necessary. 7. Emergency Procedures A clear chain of command is non-negotiable
Contact details for the nearest hospital and site first aid station. Rescue plan for a technician stranded at height.
Tower Crane Dismantling Method Statement
Introduction
Tower cranes are commonly used in construction sites to lift and move heavy loads. However, when a construction project is completed, the tower crane needs to be dismantled and removed from the site. Dismantling a tower crane is a complex process that requires careful planning, specialized equipment, and trained personnel. This method statement outlines the steps and procedures for safely dismantling a tower crane.
Scope of Work
The scope of work includes the dismantling of a [insert type/model] tower crane, located at [insert location], to a height of [insert height] meters. The crane has a lifting capacity of [insert capacity] tons and consists of [insert number] sections.
Pre-Dismantling Activities
Before dismantling the tower crane, the following activities will be carried out:
Dismantling Procedure
The dismantling procedure will be carried out in the following stages:
Stage 1: Preparation
Stage 2: Dismantling of Crane Sections
Stage 3: Removal of Crane Components
Stage 4: Final Activities
Safety Measures
The following safety measures will be implemented during the dismantling process:
Equipment and Tools
The following equipment and tools will be used during the dismantling process:
Quality Control
The following quality control measures will be implemented during the dismantling process:
Environmental Considerations
The following environmental considerations will be taken into account during the dismantling process:
Conclusion
The dismantling of a tower crane is a complex process that requires careful planning and execution. This method statement outlines the steps and procedures for safely dismantling a tower crane. By following this method statement, the risk of accidents and injuries can be minimized, and the dismantling process can be completed efficiently and effectively.
A dismantling method statement devotes 40% of its content to ground operations. Why? Because most injuries occur not at height, but during slinging, unslinging, and transport.
Ground controls include:
This method statement covers the safe dismantling of the tower crane after its service life on site. Dismantling will proceed in reverse sequence of erection, using a mobile crane of sufficient capacity (or a derrick/jib crane if required). The procedure ensures the tower crane components are lowered safely, no uncontrolled releases occur, and personnel are protected from falling objects, crushing, and other hazards.