The Pinnacle


LOCATION: Bishopsgate, London
CONTRACTOR: Keltbray Ltd
CLIENT: Arab Investments
VALUE: £2.3m
SECTORS: Commercial, mixed use, residential and retail
SERVICES: Concrete Cutting and Controlled Demolition

Kilnbridge successfully completed concrete cutting works involving the largest drilling and sawing contract ever undertaken in the UK at The Pinnacle, 38 Bishopsgate. This formed an integral part of the overall demolition and piling contracts. The piles installed on the Pinnacle are the largest ever placed in the UK at 65m deep. The stalled £1bn development would have been the tallest building in the UK at 63-storeys high (288m).

The Pinnacle
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Kilnbridge completed the formation of circular and octagonal openings in four levels of concrete floor slabs of varying thicknesses from 450mm to 3.4m to facilitate the installation of 2.4m diameter pile foundations from ground level. A total of 8,677 l/m was diamond stitch drilled and a total of 708m² was diamond wire sawn on the pile enabling works.

We also worked on the major concrete cutting of structural beams and columns to facilitate the controlled demolition and dismantling of the existing structure. One significant challenge was removing a transfer beam measuring 3.5m x 2.5m in cross sectional area and weighing 22 tonnes per metre by wire sawing it into smaller sections so it could be lifted out by a crane.

Due to the location, in the heart of the financial and legal district of the City of London, diamond cut, lift and grinding methods were utilised in order to comply with the onerous noise, vibration and party wall restrictions.