(19)

(11)

EP 3 464 745 A1

(12)

(43) Date of publication: 10.04.2019 Bulletin 2019/15 (21) Application number: 17730389.8 (22) Date of filing: 23.05.2017

(51) International Patent Classification (IPC):  E04B 2/74(2006.01) E04C 3/28(2006.01) (86) International application number: PCT/EP2017/062393 (87) International publication number: WO 2017/202836 (30.11.2017 Gazette 2017/48)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 24.05.2016 SE 1650713 (71) Applicant: Wood Tube Sweden AB 664 32 Grums (SE)	(72) Inventors: HÄRDIG, Kurt 661 96 LÅNGSERUD (SE) KÄMPE, Patrik 664 32 GRUMS (SE) (74) Representative: Hynell Intellectual Property AB  Box 138 683 23 Hagfors 683 23 Hagfors (SE)