Seismic safety isn’t just about the building’s structure

When it comes to earthquakes, we immediately think of the resistance of columns, beams, and foundations. In reality, building systems can also suffer significant damage. Among these are air ducts, which during an earthquake can detach, deform, or fall, creating dangerous situations.

If a duct network is damaged, it can block escape routes, compromise the building’s functionality, and make emergency management more difficult, especially in hospitals and other strategic facilities. For this reason, designing systems with seismic risk in mind isn’t just about complying with regulations—it’s about actively contributing to people’s safety.

What happens to air ducts during an earthquake

During an earthquake, systems also follow the building’s movements. If they aren’t properly fastened, they can sway, collide with other elements, loosen anchor points, or, in the most severe cases, come loose.

To reduce these risks, it’s important to design an adequate bracing system, correctly selecting the appropriate bracing based on the weight of the system. This way, the ducts remain more stable even during the stresses caused by an earthquake.

The advantage of pre-insulated aluminum ducts: less weight, greater safety

One of the aspects that most affects how a system behaves during an earthquake is its weight. The lighter a duct is, the smaller the forces acting on it during the building’s oscillations.

Pre-insulated aluminum ducts, such as the P3ductal system, weigh less than traditional sheet metal ducts: between 70 and 80% less. This means they place less strain on fastening systems, requiring fewer braces.

In this regard, P3 has developed a seismic bracing system specifically designed to ensure maximum safety of P3ductal ducts in the event of an earthquake.

Materials that help withstand earthquakes better

In addition to being much lighter, pre-insulated aluminum ducts offer another important advantage: they are better able to absorb the vibrations caused by an earthquake thanks to their high damping values. These ducts tend to oscillate less and return to a stable condition more quickly than traditional sheet metal ducts.

This behavior reduces stress on fastening points and helps keep the system safer even during a seismic event.

The performance of these systems has been confirmed by specific shake table tests, which verified their reliability under conditions similar to those of a real-scale earthquake.

Safety comes from teamwork

To create a system that is truly safe from a seismic standpoint, it’s essential for all parties involved to work in a coordinated way. P3 has developed P3ductbim, a specific plugin compatible with REVIT. This powerful calculation tool enables highly precise seismic design of air ducts, reducing errors and facilitating coordination between designers and installers.

Seismic protection of systems should not be seen merely as a legal obligation, but as an investment in people’s safety and in the continuity of building operations. Choosing lightweight, reliable, and properly designed systems means reducing risks and increasing the building’s ability to withstand a seismic event.