I was recently asked what could be done in a remedial manner to retrofit a 40' high travertine panel wall (1-1/4 thickness panels) in which structural steel studs, with a non-waterproofed layer of exterior (?) sheetrock, form the backup with the anchors being a ferrous disk (not stainless), now rusting and popping shards of the stone and thus reducing the integrity of the wall, with a dog-leg from the disk welded to the steel stud, we hope it is welded. This was over the phone long distance from Dallas for a VERY fancy up-scale shopping mall establishment at a non-disclosed ex-urban location near enough to all of us. After contempleting the faxed sketch for several nano-seconds, grunting a few times, a healthy pause of contemplation, I broke down and asked if they had considered the availability of a structural duct tape.

I'm still on the project, and we still do not have a convenient solution.