How interlocking door system works

One of the most secure methods of access control

An interlocking door system is one of the most secure methods of access control, but how exactly does it work? In its simplest form, an interlocking system is composed of two doors electronically connected, so one can open only if the other has closed.

Using identification

When the user arrives in front of the first door: a) can ring and ask for the opening, b) the dorr can be automatically opened by a presence sensor, c) the user has to be identified (by id badge, pin code, biometric system, etc.), after that, user enters the first door which must close behind him before the second door opens and allows him to pass through. Rather like an airlock.

When you are inside the interlocking system (also called mantrap) the internal personnel or guards can easily block your passage and force you to go back. In other kind of interlocking system the user identification can be requested at the entrance or inside (between the two doors).

High-Level Entrance Security

Interlocking doors provide one of the highest levels of entrance control and access management available. As well as intrusion protection, they can also offer a very high physical protection with metal detector and armored structure (anti-drilling manganese steel panels, bullet proof frame and glass, blast attacks resistance, etc.).

Detection and Identification Systems

Interlocking doors are often fitted with a range of different detection systems. You can have single person passage smart sensors, for example, they detect when more than one person has entered into the mantrap and prevents the second door from opening. It is also common for metal detectors to be built into a booth when there is a threat of firearms being carried through (banks, embassies, etc.).

Piggybacking and Tailgating

Interlocking doors are particularly effective at stopping piggybacking or tailgating.

  • Can be installed a piggybacking detection system which allows to block the passage when more than one person has entered into the "mantrap" (i.e. also when a person take an other person on their arms)
  • Can be installed a tailgating detection system which blocks any attempts to enter a restricted area by following closely behind someone with the correct authorisation

Emergency Exit with interlocking system

CoMETA has designed and installed many emergency exits with integrated interlocking system. They are often request to enforce the burglar proof level on a main entrance but at the same time they need an emergency exit (with escape-route certification). That's possible creating a custom emergency exit with interlocking system where each door is equipped with a special frame and elements. It's an interlocking system with armored emergency exits (with both RC4 burglar proof and escape-route certifications).