3 inch core drilling concrete floors

One of the tougher jobs when core drilling is going through metal framing for sheetrock in when it is part of the project. Usually 3 inch core drilling through metal framing is different for if you do not have the core drill rig anchored or vacuum sealed to hold the rig to the floor then your going to have problems cause the core drill bit when engaging the metal framing will maybe try to skip around making starting the hole tough to do.