I wonder if there are another buildings that have been permitted as Type IV-C yet?
As far as I'm aware, Oregon is the first state to incorporate the prescriptive path elements for Tall Wood Buildings into its building code, via
Statewide Alternate Method No. 18-01. These are amendments that have been approved for incorporation into the
2021 International Building Code (IBC). (For context, Oregon's current building code is an amended version of the 2012 IBC; later this year we'll adopt the 2018 IBC as the basis for our code).