Both IRCAM and Rue de Meaux use a rigid geometry and a relatively small element size. Later, Renzo Piano developed the use of terracotta in his design for the Cité Internationale in Lyon. Here larger and more curved components are used. He developed a system using twenty different models of cladding panels,
including curved corner elements.Their size varies in length from 0.2 m to 1.4 m and they are mounted on aluminium rails. This system formed the basis of the 'Bardeau' system now marketed in the UK, USA and Europe byTerreal.
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