David Bolton Why Security Openings Fail at the Floor: The Case for Interlocking Thresholds The Vulnerability Nobody Specs Until It Is Too Late This article covers what interlocking thresholds are, why they matter in security-sensitive openings, and how specifiers, facility managers, and com... commercial door hardware door bottom seals facility hardening security hardware thresholds Nov 11, 2026
David Bolton UL 752 Bullet-Resistant Ratings Decoded: How to Match the Level to the Opening What This Article Covers -- and Who Needs It If you are specifying a secure entry for a bank, government facility, school office, hospital pharmacy, or any opening where forced ballistic entry is a de... UL 752 bullet-resistant doors door specification security hardware specialty openings Nov 3, 2026
David Bolton Anti-Passback Rules: What Access Control Specifiers and Facility Teams Get Wrong at the Door What This Article Covers -- and Who It Helps Anti-passback is one of the most misunderstood rules in access control system design. Facility managers, security integrators, and commercial contractors o... access control door position switches electric strikes electrified hardware security hardware Aug 16, 2026
David Bolton NRP Hinges on Outswing Doors: When the Pin Becomes the Vulnerability Why the Hinge Pin Is a Security Problem on Outswing Doors This article is for commercial contractors, facility managers, and architects who specify or install hardware on outswing doors. It explains w... NRP commercial door hardware hinges outswing doors security hardware Aug 4, 2026
David Bolton NRP Hinges on Outswing Doors: When the Pin Is the Vulnerability and How to Fix It Before the Frame Is Set The Problem Nobody Catches Until the Door Is Already Hung Outswing commercial doors show up constantly in schools, healthcare facilities, retail storefronts, and industrial buildings. They improve egr... commercial door hardware hardware specification hinges outswing doors security hardware Jul 14, 2026
