David Bolton When the Mortise Lockset Hold-Back Function Creates a Liability: What Facilities Miss About Trim Compatibility and Door Classification Why Hold-Back on a Mortise Lockset Is a Problem Waiting to Happen This article is for facility managers, commercial contractors, and project architects who specify or maintain mortise locksets with a ... fire door compliance hold-back function institutional hardware lockset trim selection mortise locksets Aug 18, 2026 Our Blog