(19)

(11)

EP 3 580 401 A1

(12)

(43) Date of publication: 18.12.2019 Bulletin 2019/51 (21) Application number: 18705469.7 (22) Date of filing: 08.02.2018

(51) International Patent Classification (IPC):  E04C 1/42(2006.01) E04C 2/54(2006.01) (86) International application number: PCT/GB2018/050356 (87) International publication number: WO 2018/146477 (16.08.2018 Gazette 2018/33)

(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 RS SE SI SK SM TR (30) Priority: 08.02.2017 GB 201702035 (71) Applicant: Ian Ritchie Architects Ltd. London E14 8AZ (GB)	(72) Inventor: RITCHIE, Ian London E14 8AZ (GB) (74) Representative: Gill Jennings & Every LLP  The Broadgate Tower 20 Primrose Street London EC2A 2ES London EC2A 2ES (GB)