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(11)

EP 1 165 899 A1

(12)

(43) Date of publication: 02.01.2002 Bulletin 2002/01 (21) Application number: 00910399.5 (22) Date of filing: 02.03.2000

(51) International Patent Classification (IPC)7: E04B 1/38, E04B 1/58 (86) International application number: PCT/AU0000/145 (87) International publication number: WO 0052/275 (08.09.2000 Gazette 2000/36)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 02.03.1999 AU PP896299 11.03.1999 AU PP917899 16.03.1999 AU PP922999 19.01.2000 AU PQ516500 (71) Applicant: Klasgold Pty Ltd Toowoomba, QLD 4350 (AU)	(72) Inventor: BEVIS, David, Allen Toowoomba, QLD 4350 (AU) (74) Representative: Schmitt, Armand et al Office Ernest T. Freylinger S.A. 234, route d'Arlon, B.P. 48 8001 Strassen 8001 Strassen (LU)