Same here, it is a conveinient way of suspending the GEC / UFER in the bottom in the pour. The guy probhably wrapped it at the end to get it to stay put while he rolled it out. The zip tie wont matter after preservation in the concrete... Any galvanic action is on the steel not the copper, and minimal at best. With current prices of copper you may see less of this type installation. Usually I try to go across the rebar, not along it....
[This message has been edited by e57 (edited 06-22-2006).]
