Can Floating Shelves Be Installed On A Wall Framed With Steel Studs?

You might be OK if the shelves are shallow. If they are just ledges, like 6″ deep, it might work okay, but if you aim to put deeper shelves and load them up with books or anything heavy then forget it, you need to open up the wall and add blocking, wood studs, or other suitable bracing to attach to as well as stiffen the wall. The lag screws provided will not work with steel studs. Please refer to the installation guide video, as well as share it with your contractor and let them figure out the best way to proceed.