Last weekAutomatic operators at a school entrance I posted about whether automatic operators are required by the International Building Code (IBC) for accessible public entrances on schools, which raised another Quick Question:

When a door that is secured to prevent unauthorized access from the outside is equipped with an automatic operator, how does the interface between security and accessibility function?

This has become a common application, but as with most door openings, this takes a bit of preplanning.  If the proper hardware and operational description are not in place from the start, you could end up with a door that doesn’t unlatch for the automatic operator to open the door, or a locked door that allows free access when someone presses the button for the automatic operator.

It has been a while since I’ve written a hardware spec, so I asked Mark Kuhn of Allegion for a typical hardware set for this application, including the operational description explaining how it will work.  The key is the electric latch retraction panic hardware (or latch retraction lockset), which retracts the latch before the door opens automatically, along with the relay in the power supply to coordinate the exterior actuator with the access control system.  If someone does not present a valid credential, the exterior actuator will not open the door, but the interior actuator will always open the door automatically to allow someone to exit (the door can also be used manually for egress at all times).

The hardware set is below…is there anything that you would do differently?  If the idea of specifying this hardware makes your head spin, you can always contact an Allegion specwriter for help.  😀

Hardware Group No. 36

For use on Door #(s): 100.1

Provide each OPENING with the following:

QTY   DESCRIPTION CATALOG NUMBER FINISH MFR
2 EA   CONT. HINGE 112HD EPT 628 IVE
2 EA POWER TRANSFER EPT10 CON 689 VON
1 EA ELEC PANIC HARDWARE SD-RX-QEL-9949-EO 24 VDC 626 VON
1 EA ELEC PANIC HARDWARE SD-RX-QEL-9949-NL-OP-110MD 24 VDC 626 VON
1 EA INTERFACE BOX JB7 AS REQUIRED VON
2 EA SFIC MORTISE CYL. 80-110 CAM AND CYLINDER RING AS REQUIRED 626 SCH
1 EA SFIC RIM HOUSING    80-129 626 SCH
3 EA SFIC CORE 80-032 626 SCH
2 EA LONG DOOR PULL 9266 72″ O 630-316 IVE
2 EA OH STOP 100S 630 GLY
1 EA SURFACE CLOSER 4040XP EDA 689 LCN
1 EA PA MOUNTING PLATE 4040XP-18PA 689 LCN
1 EA CUSH SHOE SUPPORT 4040XP-30 689 LCN
1 EA BLADE STOP SPACER 4040XP-61 689 LCN
1 EA SURF. AUTO OPERATOR 4642 689 LCN
1 EA WEATHER RING 8310-801 LCN
1 EA RELAY/DOOR SEQUENCER 8310-845 689 LCN
2 EA ACTUATOR, TOUCH 8310-853T 630 LCN
2 EA DOOR SWEEP 8198AA AA ZER
1 EA THRESHOLD 566A-MSLA-10 A ZER
1 EA CREDENTIAL READER MTB15 BLK SCE
2 EA DOOR CONTACT 7764 628 SCE
1 EA POWER SUPPLY PS902 900-4RL 120/240 VAC LGR SCE
1 PROVIDE FACTORY POINT TO POINT WIRING DIAGRAMS AND RISER DIAGRAMS
1 NOTE SEALS BY DOOR MFR

 

OPERATIONAL DESCRIPTION: DOORS NORMALLY CLOSED AND LOCKED.  PRESENTING VALID CREDENTIAL TO READER MOMENTARILY RETRACTS PANIC DEVICE LATCHES AND MOMENTARILY ENABLES EXTERIOR ACTUATOR BUTTON.  PUSHING ENABLED EXTERIOR ACTUATOR BUTTON SIGNALS AUTOMATIC OPERATOR TO MOMENTARILY OPEN DOOR.  INTERIOR ACTUATOR ALWAYS ENABLED. PUSHING INTERIOR ACTUATOR BUTTON SIGNALS AUTOMATIC OPERATOR TO MOMENTARILY OPEN DOOR. PANIC DEVICE LATCHES ALSO CAPABLE OF BEING ELECTRONICALLY DOGGED DOWN (I.E. PUSH/PULL MODE) AS DESIGNATED BY ACCESS CONTROL SYSTEM SCHEDULE. EXIT DEVICES LATCH AND LOCK WITH ACTIVATION OF SECURITY SYSTEM. DOOR REMAINS LOCKED TO PREVENT ACCESS UPON POWER LOSS.  DOOR ALLOWS FREE EGRESS AT ALL TIMES.  

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