Fire protection is of the utmost importance for any building, and passive fire protection systems are crucial to a building’s fire safety strategy.
Passive fire protection measures slow down and prevent a developing fire and smoke from spreading, aiming to limit loss of life and possible financial devastation. Passive fire protection methods are built into the building structure.
In this guide, we’re going to talk about what passive fire protection is, what its purpose is, and how it differs from active fire protection systems.
The Purpose of Passive Fire Protection
Passive fire protection helps to stop the spread of fire in a property. Your passive fire protection strategy will contain the fire and smoke to allow for safe escape routes. This will also provide the structure with greater resiliency.
As well as containment, a passive fire safety system will put measures in place to limit the structural damage in a fire, protecting passageways, whilst also limiting damage to structural elements that could result in costly repairs.
Why is Passive Fire Protection Important?
- Saves lives by slowing the spread of fire
- Protects the structure of the building
- Reduces damage
- Works without activation
- Helps buildings meet legal and safety regulations
What are Passive Fire Protection Measures?
Fire Dampers & Smoke Dampers
These are HVAC safety components that are installed in ductwork where it passes through fire-rated walls. The dampers close automatically when they detect high heat. This helps prevent flames from spreading.
Fire Doors & Smoke Doors
Fire doors have a fire resistance rating and a smoke control rating. These help to stop the spread of fire.
Fire Curtains
Fire curtains may also be used to stop the spread; they are triggered by fire alarms and will drop to obstruct the pathway of a fire, hopefully stopping the fire spreading.
Fire Resistant Coatings
An intumescent coating is used on materials to keep them from reaching flammable temperatures
Fire-Resistant Walls
A firewall is a barrier that is installed in buildings to help structural fire resistance.
Passive vs Active Fire Protection Systems
Fire safety is made up of two complementary systems: active and passive fire protection. Passive systems, as we’ve mentioned, are built into the structure of a building and work continuously.
Active fire protection requires activation (by human intervention or automatically) to respond to a fire. Both systems are designed to reduce risk to life and property in different ways.
What are Active Fire Protection Measures?
Fire Alarms
Fire alarm systems detect smoke or heat and alert occupants to evacuate as quickly as possible.
Automatic Sprinkler Systems
Sprinklers activate when high temperatures are detected, and they release water to control or extinguish the fire.
Fire Extinguishers
These are portable devices used to tackle small fires in the early stages.
Smoke Detectors
When there is smoke, it triggers an alarm to warn residents.
Emergency Escape Lighting
Illuminates escape routes during a power failure to support safe evacuation.
Legal Requirements for Passive Fire Protection (UK)
Passive fire protection is a legal requirement in the UK, and plays a role in ensuring building are designed and maintained to limit the spread of fire and smoke. In addition, Building Codes and Regulations (Approved Document B) set out clear standards for fire-resistant construction, including requirements around compartmentation, fire stopping, and structural protection to support safe evacuation and minimise damage.
