What that hex key hole in your panic bar does (dogging, explained)

What this error means

'Dogging' holds the exit device's latch retracted so the door operates as simple push/pull during business hours — no latching, easy traffic flow. It's engaged with a hex key (or a key cylinder on better hardware, which gives you control over who can dog the door). The critical rule: fire-rated exit devices must NOT have mechanical dogging — fire doors need an active latch to hold back smoke and fire, so labeled fire exit hardware ships without it, and the code-compliant way to get the same convenience is electric latch retraction that releases on the fire alarm.

Symptoms

• You found a hex hole in the push bar and wondered
• Doors mysteriously latching (someone un-dogged) or not latching (someone dogged)

Try this first (safe DIY steps)

1. To dog: push the bar in, insert the hex key, turn per the device manual — door now works push/pull
2. To un-dog: reverse; always un-dog at close of business
3. Audit: if any door with a FIRE label on its edge has hex dogging engaged (or even installed), flag it — that combination is itself a violation

Safety: power off before any physical intervention. Never bypass covers or interlocks — fuser areas run hot enough to burn.

When to call a technician

If you want dogging convenience on a fire door: electric latch retraction retrofit — an access-control integrator job.