(19)

(11)

EP 0 832 330 A1

(12)

(43) Date of publication: 01.04.1998 Bulletin 1998/14 (21) Application number: 96901822.0 (22) Date of filing: 12.02.1996

(51) International Patent Classification (IPC):  E04B 1/ 19( . ) (86) International application number: PCT/FI1996/000079 (87) International publication number: WO 1996/025565 (22.08.1996 Gazette 1996/38)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI NL PT SE (30) Priority: 13.02.1995 FI 19950000615 (71) Applicant: RAUTARUUKKI OY 90101 Oulu (FI)	(72) Inventor: SIIVONEN, Taisto FIN-00280 Helsinki (FI) (74) Representative: Laako, Tero Jussi  Berggren Oy Ab P.O. Box 16 00101 Helsinki 00101 Helsinki (FI)