Engineering the redevelopment of the old Lloyds/TSB headquarters required both sensitivity and audacity. Parts of the original building are Grade II listed: the banking hall, much of the façade and wood-panelled meeting rooms on the fifth floor. To create a viable modern office, the client required a significant increase in usable space; lower levels, including the first of three existing basements, were converted for retail use.
Two new floors were added to the top of the six storey building. To achieve this without damage to the panelled meeting rooms, our engineers inserted six mega columns that support a steel truss at roof level: the new floors are suspended from it. A portion of the existing building was demolished behind a retained façade and replaced with a new core structure for increased stability.
Floor area was further increased by filling in the lightwell above the banking hall. Between first and fourth floors, we replaced 54 wide, brick-clad low-grade steel columns with slim, specially-rolled solid steel sections. This reduced clutter and increased flexibility of use. Elaborate temporary works supported the upper floors throughout.