Your flat copper strap is a part of the "ground system"
Ideally, Starting at your "Single Point Ground" (Which could simply be some of your flat copper strap screwed to a piece of plywood, Located near where the coax enters the building, this is the point where your coax switches or lightning arrestors would be mounted.
The flat copper strap then running outdoors, And underground, then bonded to the rest of your ground system. (You can use the before described silver alloy welding sticks to bond the flat copper strap to your ground wires)
For some good info on lightning protection see:http://members.cox.net/pc-usa/station/ground0.htm
A very long read by the time you have gone through all of the links provided, But well worth your time.
Pay particular attention to the links to the Polyphaser site.
(Many of us have found coax switches that put unused antennas to ground, And lightning arrestors from I.C.E. (Industrial Communications Engineers) to be more cost effective than other brands)