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A brick and glass-block tower

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The three-storey car park has five circular towers and an elevated walkway - the 'wallwalk' - which refers to the ancient ramparts. Visitors reach the wallwalk, which gives access to the city, via staircases set in the towers.

A combination of precast T-beams and in-situ edge beams forms the structure. The towers are of solid brickwork - rendered commons on the inside and Sherborne reds on the outside, with occasional Ketley blue bricks reminiscent of the burnt headers traditionally used in the Chichester area. The upper parts of the towers are glazed with glass blocks. The interiors of each tower are painted in distinguishing colours to help drivers find their cars. Night-lit internally with halogen lamps, the colours glow through the glass block sections.

The tower roof rests on four 203 x 203mm uc stanchions positioned to allow the roof-support channels to be face-fixed to them. The channels project to the eaves and are bolted to a ring beam.

Luxcrete glass blocks, 197 x 197mm, rise in one-block steps around part of the the circumferences of the towers. The lowest course rests on a stepped steel wall-plate, made of curved sections to follow the shape of the tower. The wall plate takes up tolerances between the brick joint and the 28mm block joint, which includes vertical mesh reinforcement. The eaves are capped with a row of glass blocks secured to the ring beam by a 100 x 100mm curved steel angle, and covered with a pressed-steel fascia. A double-channel gutter spans between the ring beam and drains into an aluminium downpipe.

Entrance openings are supported with a specially made lintel - a 203 x 178mm inverted T-shape - to make the brickwork look seamless.

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