Dave, you are right as usual.
10' on all except 90', 105' and 110' Class one..12' 0n them..birth mark at eye level..considered 6'..4' & 6', math is easy...for us dawgs that didn't finish grammer school...Now we could get into anchoring 110' steel H- Structures..that's way more fun...
Pressure treated are the same depth..sealine poles..getcha hooks sharp..these things are like concrete..but fun..about an 1/8" of your hook in the pole on a 90 footer is kinda an ass qwencher....first time I climbed them was in Calli..old power linemen there said they were safer than creasoe poles.