(19)

(11)

EP 2 137 354 A1

(12)

(43) Date of publication: 30.12.2009 Bulletin 2009/53 (21) Application number: 08736791.8 (22) Date of filing: 28.03.2008

(51) International Patent Classification (IPC):  E02D 27/42(2006.01) E04H 12/22(2006.01) (86) International application number: PCT/FI2008/050142 (87) International publication number: WO 2008/119878 (09.10.2008 Gazette 2008/41)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR (30) Priority: 30.03.2007 FI 20075216 (71) Applicant: Rautaruukki OYJ 00810 Helsinki (FI)	(72) Inventors: MOISIO, Marko FI-05460 Hyvinkää (FI) HOLOPAINEN, Ville FI-33710 Tampere (FI) (74) Representative: Valkeiskangas, Tapio Lassi Paavali  Kolster OY AB P.O. Box 148 (Iso Roobertinkatu 23) 00121 Helsinki 00121 Helsinki (FI)