OK-- let me try to make it a bit crisper-- my fused sculpture-- totems-- have a copper sleeve incased in the bottom. This sleeve is a 3/4" copper pipe fitting into which 3/4 copper pipe is fitted when its time to mount the piece, either on a base or in the garden.
The sleeve is of 1.5" in length, 3/4 + " inside diameter.
It is fused into place by letting the base of the sculpture drape, and then fuse, around the sleeve, or draping and fusing about 1/2 " of clear onto the fitting and later fusing this to the sculpture. In either case, its prudent to roll up a plug of fiber paper and stick it into the fitting to prevent glass from covering the desired opening into which the standup pipe goes.
So the sleeve is encased in anywhere from .5 to .75 inches of a glass and responds fine to the new Bullseye
firing schedule for thick glass.
Sorry about the non-metric numbers, but you can extrapolate.
(You can view examples @ www.new
mexico creates.com; then art glass/sculpture, john reeves)
Hope this is useful,