CIT decided to reconfigure the office layout and extend the floors into the building's enormous lightwell. This would involve scrapping one of the reinforced concrete access cores and rebuilding it in a more efficient form and location. The other cores would be modified. With the extended office floors, the lightwell would be about 30% of its original size.
CIT let the contract as a two-stage tender with a guaranteed maximum price, to develop the design with the construction company and ensure it was built within cost. The company opted to use the same construction team for this project as it had on its previous two, and is planning to use on its next scheme.
The challenge for the design and construction team was to carry out the works while keeping the retail units on the ground floor open. And, just to add a little extra spice, the local planners insisted that the developer increase the amount of residential space in the building.
March 2002As demolition of the core was under way, work began in the basement. Nine piles, each 350 mm in diameter, were installed. These would carry the load from the extended office floorplates and support a goods lift. Interior, the main contractor, had to scour the country to find a piling rig small enough to be manoeuvred along a 1.4 m-wide corridor in the building’s basement and yet robust enough to sink a 350 mm-wide auger pile into the ground. A high water table meant that when the team broke out the existing pile cap to install piles for the lift water flooded into the new excavations. “We had to pump 24 hours a day until the slab was put in place,” explains Interior’s Hill.
Completion July 2003
developer CIT and Morgan Stanley architect Rolfe Judd main contractor Interior structural engineer Adams Kara Taylor services engineer RHB Partnership cost consultant EC Harris roofing Able Roofing partitioning Amwell Laminates fire protection ATE Fire Protection piling Berry Piling M&E enabling works CEL Building Services demolition and asbestos removal Clifford Devin builders’ work Coffey Construction fire/smoke curtains Coopers Group insulated render David Andrews Construction structural steel Elstead Construction kitchen joinery Ergonom electrical works Gratte Bros mechanical services Gratte Manly suspended ceilings and dry walling Integra ceramic and stone tiling Keystone Restoration facade cleaning and repairs PAYE Stonework & Restoration concrete frame P Colohan architectural metalwork Raven Project Management hoardings and joinery Scotts of Thrapston cladding, new windows and entrance canopy WRC Architectural plastering and rendering David Andrew Construction lifts Kone