(19)

(11)

EP 4 584 446 A1

(12)

(43) Date of publication: 16.07.2025 Bulletin 2025/29 (21) Application number: 23777013.6 (22) Date of filing: 06.09.2023

(51) International Patent Classification (IPC):  E04B 2/14(2006.01) E04C 1/39(2006.01) E04B 2/18(2006.01) (52) Cooperative Patent Classification (CPC): E04B 2/14; E04B 2/18; E04C 1/39 (86) International application number: PCT/GB2023/052297 (87) International publication number: WO 2024/052667 (14.03.2024 Gazette 2024/11)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 06.09.2022 GB 202213019 (71) Applicant: Quick Block Limited Dundee DD1 3JT (GB)	(72) Inventors: VINCENT, Andrew Dundee DD1 3JT (GB) RENNIE, Graham Dundee DD1 3JT (GB) BRITOVSEK, Marc Dundee DD1 3JT (GB) LIDDERDALE, John Dundee DD1 3JT (GB) HOUSTON, Donald Dundee DD1 3JT (GB) (74) Representative: Hindles Limited  Clarence House 131-135 George Street Edinburgh, EH2 4JS Edinburgh, EH2 4JS (GB)