fire hazard

• Burning


  Chemical reaction where rapid oxidation of fuel produces heat and light
• Fire triangle


  • Visual representation of 3 elements needed for a fire
• Oxygen


  Approx 16% required for a fire
• Heat sources


  Needed to reach ignition temperature
• Fuel


  Gases, liquids, solids
• Types of fire hazards

  • Low hazard
  • Moderate hazard
  • High hazard
• Low hazard


  Low combustibility, only probable danger is use of emergency exits because of panic or smoke
• Moderate hazard


  Liable to burn with moderate rapidity/considerable amount of smoke but no poisonous fumes/explosions
• High hazard


  Liable to burn with extreme rapidity
• Classes of fire hazards

  • Class A - solid materials
  • Class B - flammable liquids and gases
  • Class C - electrical short circuits
  • Class D - combustible metals
  • Class K - extremely active oxides/mixtures
• Class A - solid materials

  • Wood
  • Plastic
  • Textiles
  • Paper
• Class D - combustible metals

  • Aluminum
  • Magnesium
  • Titanium
  • Zirconium
• Class K - extremely active oxides/mixtures

  • Nitric acid
  • Hydrogen peroxide
  • Solid missile propellants
  • Cooking oil
• Hazard evaluation


  1. Identify hazard

  2. Identify those at risk

  3. Evaluate/get rid of hazard

  4. Evaluate protection and precaution measures

  5. Record

  6. Review
• It takes 2 minutes for a house to be filled with toxic fumes from a fire
• PASS - fire extinguisher


  1. Pull

  2. Aim

  3. Squeeze

  4. Sweep
• REACT - what to do during fire

  1. Remove person in danger

  2. Ensure doors are closed

  3. Activate fire alarm

  4. Call local fire department
• Fire should be treated as a danger