“We produced an extensive ground works plan whereby we undertook a cut and fill exercise and introduced retaining walls where necessary. This appraisal considered both finished building requirements and the construction sequencing.
A curved 20m spanning truss was designed working with the appointed steel fabricator to ensure stability during a staged steel erection sequence. A deep cell beam was designed for the 9m cantilever with an 8m backspan. This cantilever was designed to support the roof slab and the floor below through a tie at the tip of the cantilever.
The glazed front elevation is supported by steel columns, 14m in height without any intermediate restraint. These columns support the roof over the existing building. Notional removal of these columns was undertaken to satisfy disproportionate collapse requirements. The retaining wall along the front elevation has also been designed to accommodate a traffic collision.
Working closely with the design team, the requirement for the 2 locomotive rails were understood and incorporated into the foundation and external works strategies.
The demolition of the existing building was appraised to ensure the retained portion of the building would retain its integrity for the design life of the new building. This appraisal included intrusive surveys of the existing slabs and inspections of the walls and the iconic timber turrets. Any restoration works were designed to ensure the existing building working closely with a specialist restoration contractor to ensure the existing building is integrated into the proposed building for its entire design life.”