DEM/General/TBT-DEM-013

Floor-by-Floor Demolition

Demolition › General › Floor-by-Floor Demolition

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Floor-by-floor demolition is a top-down method used for multi-storey buildings, especially in urban locations.
A high-reach excavator or remote-controlled robot works from the floor being demolished downward.
Structural loading from demolition equipment on upper floors must be assessed to prevent overloading.
Debris is typically pushed to a designated drop zone within the building footprint or cascaded down.
Dust and noise suppression is critical given the proximity to occupied buildings and public areas.
Asbestos surveys must confirm all ACMs are removed from each floor before demolition begins.
Progressive structural instability develops as each floor is removed — monitoring is essential.
Edge protection and exclusion zones at the demolition level prevent falls and material ejection.
The building services including gas, water, and electricity must be fully disconnected at each level.
BS 6187 requires a detailed method statement and sequence plan approved by a competent engineer.

Collapse risk	Removing structural elements floor by floor progressively weakens the building — incorrect sequence causes uncontrolled collapse.
Public protection	Urban floor-by-floor demolition is close to occupied buildings and public spaces requiring robust exclusion controls.
Overloading	Demolition equipment and debris loads on upper floors can exceed the residual structural capacity.

Don't

Follow the engineer-approved demolition sequence for each floor precisely
Assess floor load capacity before positioning demolition plant on upper storeys
Complete asbestos removal and clearance certification before demolishing each floor
Maintain exclusion zones around the building perimeter at all times
Use dust suppression systems continuously during all demolition activities
Monitor the structure for signs of distress including cracking and deflection
Disconnect and cap all services at each floor before demolition commences
Install edge protection at the demolition level to prevent falls and debris ejection
Brief the team daily on the planned sequence, hazards, and emergency procedures
Remove debris progressively to prevent overloading the remaining structure

DON'T demolish structural elements in a different order from the approved sequence
DON'T position heavy plant on floors without confirming residual load capacity
DON'T start demolition on any floor until asbestos clearance is certified
DON'T allow public access within the exclusion zone around the building
DON'T accumulate excessive debris on floors — remove it progressively
DON'T ignore cracking, deflection, or unusual sounds from the remaining structure
DON'T remove edge protection at the demolition level without replacement barriers
DON'T demolish a floor without confirming all services are disconnected and capped
DON'T allow hand demolition operatives to work in areas accessible to machine demolition
DON'T skip daily structural monitoring during the floor-by-floor removal process

See also: Demolition Safety Awareness | Structural Stability During Demolition

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