David Bolton The Frame Is Fine, the Door Is Not: How Half Surface Hinges Solve Retrofit Hinge Problems Without Touching the Frame Prep When the Opening Has Already Been Built, but the Hardware Has Not This article is for contractors, maintenance technicians, and facility managers who are replacing doors on existing frames and cannot ... commercial door hardware fire door hardware half surface hinges hinges retrofit hardware Oct 2, 2026
David Bolton When the Existing Keyway Stays But the Lock Gets Replaced: Cross-Keying Competitor Cylinders Into New Hardware What This Article Covers and Who It Helps When a school replaces a worn cylindrical lockset, a hospital renovates a wing, or a facilities team upgrades hardware after a breach, the last thing anyone w... cross-keying cylinders keying locksets retrofit hardware Jul 4, 2026
David Bolton Cylinder Dogging on Exit Devices: Why the Upgrade Gets Ordered Wrong Before Anyone Checks the Fire Rating What Cylinder Dogging Actually Does on a Panic Bar Cylinder dogging is a feature that lets a building operator use a standard key cylinder to hold an exit device's latch bolt in the retracted position... cylinder dogging exit devices fire-rated openings panic hardware retrofit hardware Jun 27, 2026
