Thank you,... so that makes two of us, I also have to smile here because apparently no one really reads or makes the effort to do so..... and I hope you know what the term "freitragenden/selbsttragenden Absturzsicherung" actually means..., and for the second time.. no, no concrete ceiling (otherwise you could fix it quickly, which I don't want, because of penetration... see text), and yes.. I know it’s all written there... no penetration... yes, therefore the question I asked again earlier..., or actually asked at the beginning..., no sketch needed for that!.., I want to know who might have already installed something like this, is satisfied, or can recommend a manufacturer..., for example attached.