Building Earthing works

[uzakcil]

hi there, I am oscar , working as electrical engineer in a seaport project. I'd like gather some information about building earthing work. Here, it is first time, in that project i saw earthing system both in lean concrete and raft foundation(in some buildings). Both of them don't make any connection in anywhere. Anybody can help me by answering why it is used this kinds of earthing system in different level for building infrastructure?

 

[Bobster]

look up Ufer earthing. I presume from your description this is what you mean.