(19)

(11)

EP 1 751 368 A1

(12)

(43) Date of publication: 14.02.2007 Bulletin 2007/07 (21) Application number: 05735818.6 (22) Date of filing: 02.05.2005

(51) International Patent Classification (IPC):  E04C 3/34(2006.01) (86) International application number: PCT/AU2005/000627 (87) International publication number: WO 2005/106157 (10.11.2005 Gazette 2005/45)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR (30) Priority: 03.05.2004 AU 2004902338 (71) Applicant: Rocla Pty Ltd Chatswood DC NSW 2067 (AU)	(72) Inventors: BEATTIE, Kenneth Greensborough, VIC 3088 (AU) CARTER, Chris Vermont South, VIC 3133 (AU) (74) Representative: Gerbino, Angelo et al Jacobacci & Partners S.p.A. Corso Emilia, 8 10152 Torino 10152 Torino (IT)