What Are The 5 Stages Of Fire?

What are the elements of fire?

Oxygen, heat, and fuel are frequently referred to as the “fire triangle.” Add in the fourth element, the chemical reaction, and you actually have a fire “tetrahedron.” The important thing to remember is: take any of these four things away, and you will not have a fire or the fire will be extinguished..

What is the first stage of a fire?

ignitionIncipient: This first stage begins when heat, oxygen and a fuel source combine, having a chemical reaction resulting in a fire. It is also known as “ignition”. There is usually a small fire, which often goes out on its own, before the following stages are reached.

What are the 3 stages of a fire?

Stages of fireIgnition: Fuel, oxygen and heat join together in a sustained chemical reaction. … Growth: With the initial flame as a heat source, additional fuel ignites. … Fully developed: Fire has spread over much if not all the available fuel; temperatures reach their peak, resulting in heat damage.More items…

What are the five stages of fire?

You can see in the image below the intensity of a fire at each stage.Incipient. The incipient stage of a fire is the stage immediately after ignition. … Growth. The growth stage occurs when the fire has established itself and is burning self-sufficiently. … Fully Developed. … Decay.

What is the second stage of a fire?

Growth. As we move through the phases of a fire, we come to the second stage – growth. The growth of a fire will be affected by the structure of the building and the fuel available.

What is the phase of fire?

By most standards including the International Fire Service Training Association (IFSTA) there are 4 stages of a fire. These stages are incipient, growth, fully developed, and decay.

What is tetrahedron of fire?

Four elements, also known as the fire tetrahedron, must be present in order for a fire to exist. These fire tetrahedron elements include: Oxygen. Heat. Fuel.

What are the 4 stages of a fire?

Compartment fire development can be described as being comprised of four stages: incipient, growth, fully developed and decay (see Figure 1). Flashover is not a stage of development, but simply a rapid transition between the growth and fully developed stages. (see Figures 1 and 2.)

How can you tell where a fire started?

Investigators are able to determine the original location of a fire through clues such as char patterns, “direction of melt,” and heat shadows. These burn patterns often point to the source of the fire in tell-tale patterns. For example, fire burns upward, in a V-shaped pattern away from the starting point.

What makes a fire smoke?

Smoke occurs when there is incomplete combustion (not enough oxygen to burn the fuel completely). In complete combustion, everything is burned, producing just water and carbon dioxide. When incomplete combustion occurs, not everything is burned. Smoke is a collection of these tiny unburned particles.

What is a flashover in fire fighting?

Flashover is a thermally-driven event during which every combustible surface exposed to thermal radiation in a compartment or enclosed space rapidly and simultaneously ignites. Flashover normally occurs when the upper portion of the compartment reaches a temperature of approximately 1,100 °F for ordinary combustibles.

What is D class fire?

Class D fires only involving combustible metals – magnesium, sodium (spills and in depth), potassium, sodium-potassium alloys uranium, and powdered aluminum. What is the proper way to use a Class D, sodium chloride extinguisher?