(19)

(11)

EP 0 583 249 A1

(12)

(43) Date of publication: 23.02.1994 Bulletin 1994/08 (21) Application number: 92906736.0 (22) Date of filing: 16.03.1992

(51) International Patent Classification (IPC):  E04B 1/ 19( . ) (86) International application number: PCT/GB1992/000488 (87) International publication number: WO 1992/018715 (29.10.1992 Gazette 1992/27)

(84) Designated Contracting States: GB (30) Priority: 19.04.1991 GB 19910008420 (71) Applicant: LK LIMITED Castle Donington, Derby DE7 2SA (GB)	(72) Inventors: BURY, James Allestree Derby DE3 2HH (GB) STOTT, Christopher Chellaston Derby DE7 1XD (GB) (74) Representative: Swindell & Pearson  48 Friar Gate Derby DE1 1GY Derby DE1 1GY (GB)