While it would be nice to use the current code for the retrofit, I have told the client that I intended to use the 2018 IBC for all situations where I could but then switch to either the 2018 IEBC or ASCE 41-17 for non-conforming elements. The KB-IIs would seem to fall under that exception...
CG Hopi, thanks for you thoughts. There are about 1500 of these anchors so I would prefer not to replace them for obvious reasons. You idea of testing the anchors in a cracked condition is something I will look into.
I am designing a seismic retrofit for a 110,000 square foot tilt-up building that was designed and constructed in 2000-2001 to the 1997 UBC. The building retrofit is to be designed as a risk Category IV building (essential facility) per the current code (2018 IBC) to the extent that it can be...
