Provision, testing and certification of critical access and safety systems
“Removing and refitting for central London skyscrapers”
Background: Our brief was to remove and recycle the old equipment, to assess the suitability of the existing davit plinths for a change in use, to design, install, test and commission replacement building maintenance units and monorail systems.
Results: 25 Cabot Square is a 17 floor office building owned and occupied by Morgan Stanley in the Canary Wharf development in London. The 81m tall building was designed by Skidmore Owings & Merrill and completed in 1991.
In 2008 PTSG Access and Safety were tasked by ISS (the main contractor) with removing the existing redundant davit arm system of façade access and providing a safer more user friendly system for maintaining the façade while still being relatively discreet.
Investigation of the building structure indicated that the roof areas would not be able to support the loads of even the lightest machines, so PTSG Access and Safety set about designing a track system utilizing the existing structural davit bases. This involved load testing all the bases and carrying out deflection tests to establish what the bases could support.
For the smaller terrace areas a monorail system was introduced again using the existing davit bases with us utilising rope access techniques to install the systems safely and effectively.
Following extensive co-ordination with local authorities and Canary Wharf Management the 250T crane complete with fly jib arrived on site 4th July 2009 and began lifting the old equipment off the building and lifting the new track and machines into position. Road closures, diversions and an extensive exclusion zone had to be put into place and effectively managed; as most of the surrounding buildings are office space, foot fall is significantly reduced on a weekend as is the amount of vehicular traffic, this in turn helped greatly reduce and associated risk to the general public.
Once the installation work was successfully completed the systems were tested, commissioned and inspected by the client´s insurance company Allianz.