• 1) Survey, assumptions & verification

• Compiled available drawings/records; undertook dimensional checks and visual inspection notes.
• Established conservative material assumptions (e.g., concrete density, reinforcement allowance, any liner/insert allowances where applicable).
• Embedded hold-points to reconcile actual measured piece-weights (via load indicator) against calculated values and update the plan if required.

2) Weight calculations & lift envelopes

• Produced a 1 m increment weight schedule accounting for taper and thickness variation, plus rigging and dynamic load allowances.
• Set lift envelopes and radius charts compatible with the selected crane duty, including wind limits per manufacturer’s charts and FoS ≥ 2.0.

3) Dismantling strategy & sequencing

• Recommended a top-down phased dismantling: cut ring segments to controlled lengths to maintain shell stability; avoid excessive eccentricity.
• Defined cut geometry and temporary bracing/prop allowances where local weaknesses might occur (e.g., near openings or construction joints).
• Provided exclusion zone principles and tag-line control notes to manage swing and rotation.

4) Site safety & QA controls

• Aligned with BS 7121 (planning of lifting operations) and BS 5975 (temporary works).
• Required lift plan sign-offs, daily briefings, radio protocol, and a permit-to-lift process with stop rules if conditions (e.g., wind) exceeded limits.
• Included ground bearing checks for crane mat design inputs and clear red/amber/green criteria for proceeding.