Freyssinet has been awarded a contract for the associated temporary works design and jacking of the Asticus Building in London to enable the installation of an additional floor between the existing eighth and ninth floors.
Built in 2006, the Asticus is a striking 10-storey circular office complex in Westminster adjacent to the St. James underground station. The extension works will maintain the integrity of the original architectural features while providing an extra floor and additional office space.
Freyssinet is collaborating with London-based contractor Iconic on the innovative structural extension, which will require the construction of extensive temporary works, strengthening of the existing slabs to limit deflection during the jacking operations, cutting of the slab at the core and four internal columns to disengage the building from the lower levels before the existing level nine and 10 (with roof service left in place) are jacked 3.6m to allow the installation of the new storey – all whilst levels one – seven remain fully occupied and operational.
Once the structure has been jacked up into the final position, the columns will be reinstated, followed by re-connection to existing lift core and the new slab being cast.
The project is due to start in September 2020.