David Bolton Ball Bearing Hinges on Commercial Doors: How to Size and Specify Them Right the First Time Why Getting Hinge Spec Right Matters Before the Door Ever Gets Hung This guide helps contractors, facility managers, and specifiers choose the correct ball bearing hinge size, quantity, and configurat... ball bearing hinges commercial door hardware door hardware installation full mortise hinges hinge specification Apr 23, 2026
David Bolton NRP Hinges on Outswing Doors: When and Why Non-Removable Pins Matter The Security Gap Most Contractors Miss at Outswing Openings If a door swings toward the outside of a building, its hinge pins face the public side of the opening. On a standard loose-pin hinge, that m... NRP hinges commercial hardware door hinges hinge specification outswing door security Apr 22, 2026