If so, do the following: In between the steel studs, rip the sheet rock in 8 to 10 inch strips, horizontally.  Put a block across the bottom of the rip, make sure the block is stable.  Using a pneumonic anchoring machine, arch in necessary pins, and secure with engineering grade anchor epoxy.  (Stainless steel pins, this time)  Once hardened, remove wood block, and replace with steel, level to pin shafts.  Secure steel blocks.  If you cannot get behind it, drill the face, into the studs, counter sink, and install, threaded pins and hide with a travertine fill.

--Your old steel studs and new steel pins are going to continue to rust behind the porous travertine.  Unless the travertine has some artistic value, tear it all out and start over.  On second thought, if it does have artistic value, remove it as carefully as you can (it will still disintegrate) save it, and install new stone (preferably not travertine) and backup system correctly.

Ralph

--
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