book-2

INTERIOR STRUCTURE 123▲ 6.32 Westminster Station, London, England, Michael Hopkins & Partners, 1999. Tunnellining exposed at a platform.▲ 6.33Horizontal props between side walls.tunnel liners, plates and bolts speak the unique language of undergroundconstruction (Fig. 6.32). However, the structure expresses the externalpressures most clearly in the main hall (Fig. 6.33). Designed to be asopen as possible, this huge 35 m high hall houses seventeen escalatorsand numerous floors that service the various lines that pass through