(19)

(11)

EP 0 990 077 A1

(12)

(43) Date of publication: 05.04.2000 Bulletin 2000/14 (21) Application number: 98921272.5 (22) Date of filing: 18.05.1998

(51) International Patent Classification (IPC)7: E04B 2/60, E04B 2/62, E04C 3/07, E04C 3/32 (86) International application number: PCT/AU9800/365 (87) International publication number: WO 9857/001 (17.12.1998 Gazette 1998/50)

(84) Designated Contracting States: BE CH DE ES FI FR GB IT LI NL SE (30) Priority: 11.06.1997 JP 16951497 19.08.1997 AU PO008697 (71) Applicant: CDS NU-Steel Pty Ltd Clear Island Waters, QLD 4226 (AU)	(72) Inventor: SAWADA, Taiichi Clear Island Waters, QLD 4226 (AU) (74) Representative: Smaggasgale, Gillian Helen  OLSWANG, Sollicitors90 Long Acre GB-London WC2E 9TT GB-London WC2E 9TT (GB)