Jason Lejeune Training Specialists

Evolve.com: A leading provider of services to the health and social care sector. We are driven to improve care standards for those needing our support.

🚒 FIRE TRIANGLE and FIRE TETRAHEDRON: WHAT’S THE DIFFERENCE?

Every firefighter learns that understanding how fire behaves is the first step in controlling it safely. Two of the most important concepts in fire science are the Fire Triangle and the Fire Tetrahedron.

🔺 The Fire Triangle explains the three elements required to start and sustain a fire:

🔥 Heat – Raises the fuel to its ignition temperature.
🪵 Fuel – Any combustible material, such as wood, paper, plastics, or flammable liquids.
💨 Oxygen – Usually supplied by the air, which contains about 21% oxygen.

Remove any one of these three elements, and the fire will go out.

🔷 The Fire Tetrahedron expands on the Fire Triangle by adding a fourth element:

⚛️ Chemical Chain Reaction – A continuous series of chemical reactions that keeps combustion going after the fire has ignited.

This fourth element explains why some extinguishing agents, such as dry chemical fire extinguishers, can stop a fire by interrupting the chain reaction rather than simply cooling it or removing oxygen.

🚒 Firefighters extinguish fires by removing one or more of these elements:
💧 Cooling – Removes heat, usually with water.
🫧 Smothering – Reduces or excludes oxygen using foam, carbon dioxide (CO₂), or a fire blanket.
⛽ Starvation – Removes or shuts off the fuel source.
⚛️ Chain Reaction Interruption – Stops the chemical reactions that sustain combustion, typically using dry chemical agents.

Understanding these concepts helps firefighters choose the safest and most effective extinguishment method for different types of fires. Fire science is more than putting water on flames—it is understanding how fire starts, how it grows, and how to stop it safely.

The beef industry owes more to autism than most people realize.

Last month, I toured the processing facility at Colorado State University.

Early in her career, Dr. Temple Grandin, an autistic professor, and animal behavior expert, started paying attention to how cattle reacted to shadows, reflections, noises, and other parts of their environment.

She then used those observations to design handling systems that reduce fear for cattle while also making facilities operate more efficiently.

This facility is also connected to a program called Beef Sticks for Backpacks.

They produce high-protein beef sticks that are distributed through backpack food programs for kids experiencing food insecurity.

To me, this feels like a reminder that autistic special interests aren’t getting in the way of a meaningful life, they can often become the path TO a meaningful life.

Because Temple paid attention to details that others overlooked, cattle experience less fear and stress today than they otherwise would have.

And because people at Colorado State University use their resources to help others, children have increased access to food.

Stories like this rarely get attention but I wanted a share because good work is being done everywhere, even when there aren’t cameras to document it. ❤️

Nightly giggles…

from our weekly spot in The New World Magazine