4The enclosed sample is Fluon ETFEfilmof 250 microns thicknesswhich was used on the National Aquatics Center in Beijing.Wewould like tothankAGCChemicals fortheirkind donationof these samples.Graphic design: Esther Mildenberger, envision+Cover photograph: Ben McMillanThis book is also available in a German edition:ISBN 978-3-7643-8562-0Library of Congress Control Number: 2008920812Bibliographic information published by Die Deutsche BibliothekDie Deutsche Bibliothekliststhispublication in the DeutscheNationalbibliografie; detailed bibliographic data is available inthe Internet at .This work is subject to copyright. All rights are reserved, whetherthe whole orpartof the material is concerned, specifically therights of translation, reprinting, re-use of illustrations, recitation,broadcasting, reproduction on microfilms or in other ways, andstorage in data banks. For any kind of use, permission of thecopyright owner must be obtained.2008 Birkhauser Verlag AGBasel· Boston· BerlinP.O.Box 133, CH-4010 Basel, SwitzerlandPart of Springer Science+Business MediaPrinted on acid-free paper produced fromchlorine-free pulp. TCF00Printed in GermanyISBN 978-3-7643-8563-7987654321
IanLiddellSustainingNewTechnologies---------It is rare to have a new material introduced into the buildingconstruction industrythathas had such an impact onthe design and performance of buildings asETFEfoil. Overthe past century there have been numerous examples ofnew materials and technologiesthathave been advancedby inventive engineers. In many cases, these materials havebeen popular for abriefperiod and then have died awayto a lower level of use. Concrete shells were developedin the 1950s and flowered in the 1960s,butthe change inbuilding economics and design fashion and the exactingrequirements of concrete technology finished them off.Fabric architecture blossomed in the 1980s and 1990sbutsince then has been in decline. Likewise, there was amarked change in the use of glass whenfloatglass wasintroduced around 1955. With toughening and laminatingtechniques, larger panels were possible. However,theweight of glass and problems with fracture and seals havemeantthatmulti layer construction on roofs isstillriskyand expensive. Now, ETFEfoil cushions are providingnew opportunities for lightweight, tough and durable en-closures, and there seems to be every reason for buildingapplications ofETFEto continue to grow and diversify.