Demolition on live sites

The presence of a functioning supply of electricity, gas, water and telecomms are known as ‘live’ services. The utilities always require the earliest site-specific information in the project planning phase of a demolition and/or excavation.

The project management team at DHD have 35 years experienced and detailed knowledge in identifying significant hazards and safety risks, which are often less obvious, such as underground cables, and high versus low voltage electricity.

Buried pipe and cable detection

DHD operate modern industry tools for buried pipe and cable detection, which can be used as standalone or in tandem with units designed to detect smaller, weaker signal cables.

Depth and location cannot always be accurately determined by simply referring to drawing and mapping information. Service drawings on structures more than 25 years old are likely to be outdated. To positively verify the exact physical location of service supply cables will almost always require manual exploration and trial holes along the presumed route.

Photo 28-05-2015 16 54 44 (1)Temporary service cut-offs

Where temporary service isolation is required only during renovation projections, DHD will ensure:

  • Distribution boxes or valve housing are protected from damage or contact throughout the duration of works.
  • A safe system of work and procedure is written in advance, including risk assessment, safety protection and monitoring.

Shallow ground cables

DHD ensure that any shallow ground utility service runs are protected against damage:

  • When heavy machinery and transport will be crossing over the affected route.
  • Where older service runs are laid in clay duct pipes or without any external protection.

Overhead cables

Before carrying out demolition work where overhead cables are known to exist, DHD liaise closely with the electrical supply company who will usually undertake their own site survey prior to work commencing.

Safety and protection

Our duty of care and responsibility means on-site safety and protection on-site are always a priority at every step of the way from planning stage to completion, at any scale.