David Bolton Exit Device Prep on Hollow Metal Doors: What Gets Cut Wrong Before the Device Ever Ships Why Door Prep Is the Decision That Happens First -- and Hurts Last This article is for commercial subcontractors, door and hardware suppliers, and facility project managers who specify or install exit... door prep exit devices fire door compliance hollow metal doors panic hardware Jul 26, 2026
David Bolton When the Replacement Lockset Does Not Match the Existing Door Prep: What to Measure Before You Order Why the Door Prep Is the First Thing to Confirm -- Not the Last This article is for maintenance technicians, commercial subcontractors, and facility managers who need to replace a worn or damaged cyli... backset commercial door hardware cylindrical locksets door prep lockset replacement Jun 26, 2026
