(19)

(11)

EP 2 456 932 A2

(12)

(88) Date of publication A3: 22.03.2012 (43) Date of publication: 30.05.2012 Bulletin 2012/22 (21) Application number: 10734301.4 (22) Date of filing: 16.07.2010

(51) International Patent Classification (IPC):  E04C 2/16(2006.01) (86) International application number: PCT/GB2010/051166 (87) International publication number: WO 2011/010127 (27.01.2011 Gazette 2011/04)

(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 SE SI SK SM TR (30) Priority: 23.07.2009 GB 0912830 (71) Applicant: Construction Innovation Ltd South Yorkshire S10 5PX (GB)	(72) Inventor: WALDRON, Peter South Yorkshire S10 5PX (GB) (74) Representative: Stainthorpe, Vanessa Juliet  Harrison Goddard Foote Fountain Precinct Balm Green Sheffield S1 2JA Sheffield S1 2JA (GB)