In parking garages incidents happen where rapid evacuation is required. Think of fire detection, CO detection and LPG detection. Parking garages have an even bigger problem nowadays; these objects are often completely closed by the far-reaching security.
This is an unwanted situation. The entrances and exits are often secured with speed gates or grilles that open and close at each passage. The only escape routes are the stairwells, because using elevators is out of the question during a fire situation. Add to this that by smoke your sight in such an object decreases rapidly, and you will understand:
”the worst case scenario is complete”
Of course, a lot of attention is given to the evacuation during the designing of a building. If things are not regulated well in the design, there will never be a license provided by the fire department. However, it is important to be critical and ensure how things are settled.
We always ask questions in the offer stage about how these things are arranged. The following questions can arise:
- Are the speed gates/grilles controlled at the entry and exits?
- By which system is this controlled? (Make sure this is at least achieved by the evacuation system or if necessary by the fire alarm.)
- Is there emergency lighting?
- Have you ever thought of floor lighting?
- Have you ever thought about visualization panels for signage?
”You can see that in the field of lighting there are pretty good opportunities”
We are an proponent of emergency lighting with signage. Because of the smoke, visualization on the floor is actually the only reliable method. Think in particular of airplanes where they also use signage. This lighting can be controlled by the evacuation system.
Speakers in parking garages
Our article on evacuation alarms in tunnels goes also a little deeper into acoustic problems. It is important to pay attention to the acoustics in a parking garage. Because of the concrete walls there are many reflections, and the STi values will not be great.
The speakers in a parking garage must comply with the EN54-24 standard. Furthermore, it is preferable to include the speakers in a ring, and then place an isolator on each speaker. This increases the reliability significantly.
There is said only little in the NEN2575 about the sound level. There are no requirements applying to this area. From experience, we advise you to require at least 65dB sound in all places in the garage.
Tip! If a garage has a CO/LPG detection, there is usually an optical signaling device available that indicates that you must turn off the engine of the car. These signs often contain a acoustic sounder. It is recommended to deactivate this sounder in case of an spoken word evacuation. The chances are very high that in such a case the spoken word is not understood.