David Bolton Mixed-Corner Spring Hinge Replacements: Why the Frame Mortise You Already Have Decides the Leaf You Order Next The Replacement Order That Arrives Wrong A facility manager at a school or clinic calls for a replacement spring hinge on a self-closing corridor door. The hinge is ordered, it ships, the installer op... commercial door hardware fire-rated doors hinge replacement self-closing doors spring hinges Jun 4, 2026 Our Blog
David Bolton When a Ball Bearing Hinge Fails Before the Door Does: Reading the Warning Signs During Routine Maintenance Why Ball Bearing Hinges Fail Quietly -- and What That Costs You This article is for facility managers, maintenance technicians, and commercial contractors who are responsible for keeping doors in serv... ball bearing hinges commercial door maintenance door closer wear fire door inspection hinge replacement May 19, 2026 Our Blog