Some struct. engineers are hyper-concerned about the moisture intrusuin problem. They will not let the the copper UFER be tied to the structural rebar.
I was not aware the was a choice available.
250.50 Grounding Electrode System.
If available on the premises at each building or structure served, each item in 250.52(A)(1) through (A)(6) shall be bonded together to form the grounding electrode system.
If the rebar is there we must tie into it.
