Erection, climbing, jacking, dismantling and transport/relocation procedures
Erection and dismantling
Erection, climbing, and dismantling of a self-erecting tower crane must be performed by trained and competent personnel following the manufacturer's procedures. A safe system of work includes a lift plan, exclusion zones, and communication. Pre-erection checks include inspecting components for damage and ensuring the base is adequate. During erection, the crane must be stable at all times; use temporary supports if necessary. Climbing and jacking involve adding mast sections; never exceed the manufacturer's wind speed limit and ensure all pins and bolts are secured.
Transport and relocation
Before transport, the crane must be dismantled and components secured. Check transport vehicle capacity and load restraints. On arrival, reassemble according to manual. Relocation within a site requires the same procedures as initial erection.
Traps in questions
A trap is thinking that self-erecting means no assistance is needed; often a mobile crane or trained crew is required. Another trap is ignoring the need for a new risk assessment for each erection site. Also, climbing must not be done in high winds.
Worked example / rule of thumb
Rule: Always follow the manufacturer's manual for erection sequence; never improvise. Example: If wind speed exceeds 10 m/s (or manufacturer's limit), stop climbing operations.