CalvinHobbes Posted May 30, 2023 Share Posted May 30, 2023 300mm or 325mm? Link to comment Share on other sites More sharing options...
PeterW Posted May 30, 2023 Share Posted May 30, 2023 BS:845-1 and Approved Document A state cavity plus 125mm and then select the nearest standard length. Search around though as I’ve seen 350mm cheaper than 325mm..! 1 Link to comment Share on other sites More sharing options...
ETC Posted May 30, 2023 Share Posted May 30, 2023 https://www.ancon.co.uk/blog/how-to-ensure-sufficient-embedment-of-wall-ties#:~:text=Contractors are advised to double,construction about to be undertaken. Link to comment Share on other sites More sharing options...
ETC Posted May 30, 2023 Share Posted May 30, 2023 Check Ancon but will defer to the relevant BS. Link to comment Share on other sites More sharing options...
ETC Posted May 30, 2023 Share Posted May 30, 2023 https://nhbc-standards.co.uk/2020/6-superstructure-excluding-roofs/6-1-external-masonry-walls/6-1-18-wall-ties/ Link to comment Share on other sites More sharing options...
PeterW Posted May 30, 2023 Share Posted May 30, 2023 1 hour ago, ETC said: https://nhbc-standards.co.uk/2020/6-superstructure-excluding-roofs/6-1-external-masonry-walls/6-1-18-wall-ties/ That NHBC guidance is incorrect as it does not include Note 3 from Table 5 of Approved Document A, which refers to cavities of over 175mm (of which this is) and a requirement for 125mm or 62.5mm embedment in each wall. Ancon have an easier to read version here and the full version is here on Page 23. 1 Link to comment Share on other sites More sharing options...
CalvinHobbes Posted June 3, 2023 Author Share Posted June 3, 2023 Thanks so much, we got them! Ouch , eye watering price but hey ho, we want to get it done right. Link to comment Share on other sites More sharing options...
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