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