If the actual extreme load is 6 g, the glider will loose wings as soon
as G-loading is greater than 6 g. Not 5 seconds later, not 0.5 second
later, but immediately. And not "progressively" (can you loose wings
progressively ???)

Yes - on some gliders anyway. The Schweizer 1-34 is designed so that the
*first* failure occurs about 2/3 out from the root at about 8 Gs.

Tony V
http://home.comcast.net/~verhulst/SOARING