(19)

(11)

EP 1 337 723 A1

(12)

(43) Date of publication: 27.08.2003 Bulletin 2003/35 (21) Application number: 01993732.5 (22) Date of filing: 08.11.2001

(51) International Patent Classification (IPC)7: E04D 3/363, E04B 9/04, E04B 5/32 (86) International application number: PCT/AU0101/446 (87) International publication number: WO 0203/8885 (16.05.2002 Gazette 2002/20)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 08.11.2000 AU PP130300 22.12.2000 AU PP228500 22.12.2000 AU PP228600 (71) Applicant: BHP Steel Limited Sydney,New South Wales 2000 (AU)	(72) Inventor: SECCOMBE, Campbell, John TURRAMURRA, New South Wales 2074 (AU) (74) Representative: Curtis, Philip Anthony et al A.A. Thornton & Co.,235 High Holborn London WC1V 7LE London WC1V 7LE (GB)