DEM/Specific/TBT-DEM-012

Bridge Demolition

Demolition › Specific › Bridge Demolition

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Location		Date

Bridge demolition is a high-risk specialist operation requiring detailed engineering planning.
A pre-demolition structural survey must identify the bridge type, condition, and load paths.
Demolition methods include mechanical breaking, diamond cutting, strand jacking, and controlled explosives.
Post-tensioned bridges contain high-energy tendons that can release violently if cut incorrectly.
Traffic management on roads and railways beneath or adjacent to bridges must be in place.
Environmental controls are needed for dust, noise, vibration, and debris falling into watercourses.
Temporary works may be needed to support the structure during sequential demolition phases.
Utility diversions must be completed before demolition begins — bridges often carry live services.
Exclusion zones must be established to protect workers and the public from falling debris.
All bridge demolition requires a site-specific method statement approved by a competent engineer.

Prevent collapse	Uncontrolled structural collapse during bridge demolition can cause multiple fatalities among workers and the public.
Protect the public	Bridges are often above roads, railways, or waterways where the public is present during demolition.
Specialist risks	Post-tensioned elements, hazardous materials, and complex load paths require expert engineering knowledge.

Don't

Complete a pre-demolition structural survey and asbestos refurbishment survey
Obtain an approved method statement before starting any demolition work
Establish exclusion zones to protect workers and the public from debris
Coordinate traffic and rail possessions with highways authorities and Network Rail
Install temporary works to support the structure during phased demolition
Identify and divert all live services carried by or adjacent to the bridge
Use dust suppression and debris netting to control environmental impacts
Ensure all operatives hold CSCS demolition cards and relevant NVQ qualifications
Monitor the structure for movement and distress throughout the operation
Brief the team daily on the demolition sequence, hazards, and escape routes

See also: Demolition Safety Awareness | Structural Stability During Demolition

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