(19)

(11)

EP 1 073 803 A1

(12)

(43) Date of publication: 07.02.2001 Bulletin 2001/06 (21) Application number: 99918104.3 (22) Date of filing: 19.04.1999

(51) International Patent Classification (IPC)7: E04B 1/342, E04C 3/40 (86) International application number: PCT/GB9901/187 (87) International publication number: WO 9954/566 (28.10.1999 Gazette 1999/43)

(84) Designated Contracting States: DE ES FR GB NL (30) Priority: 21.04.1998 GB 9808266 (71) Applicant: Metsec PLC Oldbury,West Midlands B69 4HE (GB)	(72) Inventor: BURNS, Roy John Rugeley,Staffordshire WS15 4RS (GB) (74) Representative: Carpenter, David et al MARKS & CLERK,Alpha Tower,Suffolk Street Queensway Birmingham B1 1TT Birmingham B1 1TT (GB)