(19)

(11)

EP 1 442 181 A1

(12)

(43) Date of publication: 04.08.2004 Bulletin 2004/32 (21) Application number: 01980738.7 (22) Date of filing: 07.11.2001

(51) International Patent Classification (IPC)7: E04D 3/35, E04B 7/20, E04C 2/292 (86) International application number: PCT/GB2001/004941 (87) International publication number: WO 2003/046306 (05.06.2003 Gazette 2003/23)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (71) Applicant: Corus UK Limited London SW1P 4WY (GB)	(72) Inventors: Ponting, Christopher OakenholtFlintshire CH6 5NP (GB) Burns, Ian, Lewis MoldFlintshire CH7 6YB (GB) (74) Representative: Townsend, Victoria Jayne et al Fry Heath & Spence LLP,The Gables,Massetts Road Horley,Surrey RH6 7DQ Horley,Surrey RH6 7DQ (GB)