Entire building ground rings 4/0

[Fordean]

I have a project that shows exothermic bonding to steel beams, with 4/0 being the Grounding electrode. Bond beam and skip 3 beams and bond, skip 3 bond around entire building. ending all the way back to Pad Transformer. Plus at each of the beams that get this exothermic bond. two ground rods. Mechanically connected to same 4/0

Question is. One. Shows every 3rd or 4th beam around. You dont need to bond all beams around perimeter. Correct.? just every 3rd or fourth. Like article to show this definition. Also Details two. I wil post one myself. Looking for confirmation on this.

Where is code article on this. Didnt seem to fine Defining one in book.

 

[iwire]

None of what you described is required by the NEC all of it is a design issue and allowed by the NEC.

 

[Article 90.1]

The last time I was part of the installation of what you have explained was at an AT&T NOC. The "counterpoise" was designed by the RF and EE's. We must have gone through several hundred cadweld shots on that project.