New Access Control on a Fire Door: Follow the Evidence Before You Drill

New Access Control on a Fire Door: Follow the Evidence Before You Drill Related diagnostic: The Old Lock Mortice Tells a Story: What Previous Hardware Work Can Reveal explores the connected fault pattern and helps compare the evidence before choosing a repair. Access-control work changes a familiar fire door into a different configuration. A neat reader, lock or cable entry can still represent new penetrations and altered hardware geometry. What the pattern is telling you Map existing and proposed penetrations, cable routes, readers, locks, strikes and transfer devices before drilling. Then assess latch travel, seals, frame clearance, closer path, closing and escape hardware. For hardware faults I would establish the current configuration before making another alteration. Record lock, latch, strike, bolts, access-control parts and previous machining. Test the mechanism open and closed where appropriate, because internal hardware resistance and closed-door…