Why is there a limitation to embedment depth for resin anchor solutions ? E.g. h_ef for M16 it is limited to 320mm? This does not depend on the base material thickness. Is it some technological limitation due to using specific tools for cleaning, brushing etc? Or is there a structural reason for this?
Thank you for your enquiry question. In brief for fastener design theory (EN1992-Part 4) the concrete tensile capacity is directly used to transfer loads into the concrete component. The limitation of 20 x d is that if this is exceeded, a linear bond stress distribution or concrete cone method may not be conservative enough.
Hello PM, I'd suggest contacting your local HILTI office for assistance. They will need to know the existing concrete details, spacing, edge distances, etc . You can also look at utilising the Profis Engineering software for the design again just follow the online registration process on your local HILTI website.