Is it safe to attach a bath screen to a steel stud behind tile?
As long as there aren't any wires or plumbing in the area, because your entire drill bit length will plunge into the void &amp; get whatever's there when the hole is complete. You can avoid the plunge with a Depth Stop, Depth Gauge or block of wood or 2 (screwed together &amp; screws protruding outside the girder edges to prevent spin) on top of the girder to catch the drill. But, if all's clear then yep have at it.