Here is an example of a quick size up SOG
1. Quick Size-up Plan.
1.1 The key to any successful firefighting operation is good rapid size-up. This size-up includes many different aspects from building information to fire information. Size-up dictates the tactics used. This procedure is designed with the junior officer in mind. There will be occasions when command level officers will not be available. We will depend on you to keep our personnel safe and assure that good firefighting tactics are used.
2. Defensive vs. Offensive.
2.1 Defensive operations.
2.1.1 Defensive Operations are outside tactics. The acronym below is helpful in determining large hoselines and outside tactics. There are many situations that a defensive operation would be warranted. They are listed below.
2.1.2 Truss loft involvement. There is no for sure way to tell fire is involving areas that can not be seen from the outside. Smoke showing from the eaves is a very good indication you have a fire in the truss loft. Please don’t confuse a truss roof with standard construction. Fires involving standard roof construction should be attacked from the inside and require vertical ventilation.
2.1.3 Large fires in small buildings.
2.1.4 Fires involving large unoccupied buildings.
2.1.5 Basement fires in evacuated buildings.
2.1.6 Multiple floors on fire.
2.1.7 Hazardous materials fires.
2.2 Offensive operations.
2.2.1 Life protection is the first and foremost responsibility of all firefighters whether they are Truck Co. members or Engine Co. members. This can not be done from the outside. When savable lives hang in the balance, an offensive operation is warranted.
2.2.2 Fires involving residential occupancies in which only room and contents are involved or two or less rooms are involved. LCS can be used for multiple room fires in place of a defensive operation. (Only at residential fires)
2.2.3 Fires involving sprinklered buildings.
3. First arrival size-up
3.1.1 Construction- what is the general construction used for the building?
3.1.2 Height- how many stories are you dealing with?
3.1.3 Occupancy- what is the occupancy used for? Is it the same as it was originally
3.1.4 What you have showing- smoke, fire, people, and where.
3.1.5 Exposures- do you have exterior or interior exposures.
3.1.6 Evacuation- is anybody evacuated or is everybody evacuated.
3.1.7 Tactics- Defensive / Offensive, LCS or small lines, rescue or extinguishment.
4. Size-up that dictates tactics
4.1.1 Location- Find the fire. What sides is it showing from, what floor is it on, where is
4.1.2 Extension- Where is the fire going. Put lines between it.
4.1.3 Time / Type- What type of fire is it and how long has it been burning.
4.1.4 Severity / Size- (large fire in a vacant warehouse vs a small fire under the wooden
stairs of an occupied school)
5. Tactical Priorities that must be accomplished at every fire.
5.1.1 Rescue the trapped occupants. This means get the people in the most danger out
5.1.2 Exposures need to be covered. Do not waste all of your resources trying to
extinguish a fire that can not be. Contain the fire to the fire building and don’t burn
more than one building down.
5.1.3 Contain the fire to the area of origin, the room of origin, the floor of origin or the
building of origin.
5.1.4 Extinguish the fire.
5.1.5 Ventilate the fire with the appropriate tactic. Peaked roof gets horizontal
ventilation and a flat roof gets vertical ventilation. Top floor fires always get
5.1.6 Overhaul the fire areas and areas of potential fire spread. Overhaul needs to be
done as the fire is being fought.
6. System analysis of a structure fire. V Dunn FDNY.
FIRE STRUCTURE EXPOSURES RESOURCES UNPREDICTABLE
Size Construction Life hazard Apparatus Time
Location Occupancy Adjacent buildings Personnel Weather
Extent Area Interior Water supply
Severity Height Aux appliances
7. Large Caliber Hose Stream Selection
7.1.1 Advanced fire on arrival.
7.1.2 Defensive operations.
7.1.3 Unable to determine the size or location of the fire.
7.1.4 Large area of fire or large uncompartmentalized fire.
7.1.5 Tons of water needed for control.
7.1.6 Standpipe operations.
8. It is important to remember t
hat the fire dictates the tactics used. Each fire will be different but all need to be sized up. This is only a portion of the knowledge needed to command structural fires. Use this as a guide and only a guide.