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Transcript of OTTAWA FIRE SERVICES. 2 ObjectivesObjectives Refresher of type III construction Know the critical...
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OTTAWA FIRE SERVICESOTTAWA FIRE SERVICES
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ObjectivesObjectivesObjectivesObjectives
• Refresher of type III construction• Know the critical areas of operation
• Understanding the tactical principles of type III structures
• Understanding the application of different methods of ventilation in type III structures
• Awareness of collapse potential
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DefinitionDefinitionDefinitionDefinition
Type III buildings also know as Ordinary construction, consist of masonry load-bearing walls that support wooden floor joists used as
simple beams that span from wall to wall.
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Interior structural members, including walls, columns, beams, floors, and roofs, are completely
or partially constructed of wood or othermaterials.
CharacteristicsCharacteristicsCharacteristicsCharacteristics
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Type III buildings tend tobe larger, more imposing structures that include ornate brickwork, large balconies, and masonry
walls on all four sides.
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Identifying Type 3 StructuresIdentifying Type 3 StructuresIdentifying Type 3 StructuresIdentifying Type 3 Structures
Identifying Type III structures can be a challenge
One common mistake is to confuse Type IIIordinary construction with balloon frame
construction.
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Identifying Type 3 StructuresIdentifying Type 3 StructuresIdentifying Type 3 StructuresIdentifying Type 3 Structures
As with all buildings, typical Type III buildings should be identified in each district and
operational planning should be developed.
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Critical Areas of OperationCritical Areas of OperationCritical Areas of OperationCritical Areas of Operation
• Chimney Fires• Cocklofts and Attics
• Ceilings
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Chimney FiresChimney FiresChimney FiresChimney Fires
Most chimney fires occur because of a lack of proper maintenance and cleaning.
Chimney fires in Type III buildings are not to be viewed lightly or as routine.
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Cocklofts and AtticsCocklofts and AtticsCocklofts and AtticsCocklofts and Attics
Once fire takes hold in a cockloft space, it will run unchecked across an entire roof structure.
Depending on the fire’s origin and resource limitations, the cockloft and the basement must be
inspected for fire spread as soon as possible.
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CeilingsCeilingsCeilingsCeilings
Dropped or hanging ceilings are a common problem that firefighters encounter in Type III
buildings.
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While Type III buildings are more collapse resistant than Type V (wood-frame construction) structures, after prolonged exposure to fire floor
joists, aging mortar, and roof supports will begin to fail.
Collapse ConsiderationsCollapse ConsiderationsCollapse ConsiderationsCollapse Considerations
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CollapseCollapseCollapseCollapse
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Parapet Wall CollapseParapet Wall CollapseParapet Wall CollapseParapet Wall Collapse
When firefighters arrive on the scene of any structure, they must look forward and then look up
immediately to identify what the roofline is, the type of roof structure, and if a parapet wall is present.
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Floor CollapseFloor CollapseFloor CollapseFloor Collapse
The failure of a connection point can causelocalized collapse or set in motion a chain of events
that can reduce the entire building to rubble.
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Exterior Signs of CollapseExterior Signs of CollapseExterior Signs of CollapseExterior Signs of Collapse
Firefighters should be aware of the signs of the impending collapse of a building. Upon arrival,
firefighters should examine the building’s exterior for signs of structural instability or pre-fire
stress.
Such signs include
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Exterior Signs of CollapseExterior Signs of CollapseExterior Signs of CollapseExterior Signs of Collapse
Visible Cracks in the masonry of the exterior wallsThe presence of reinforcing stars or steel bracing
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Exterior Signs of CollapseExterior Signs of CollapseExterior Signs of CollapseExterior Signs of Collapse
Bulging Walls Damaged Brickwork
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Below-grade Fires in Type IIIBelow-grade Fires in Type IIIBelow-grade Fires in Type IIIBelow-grade Fires in Type III
These fires will punish fire companies and canescalate into complex problems that can involve an
entire city block
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Below-grade Fires in Type IIIBelow-grade Fires in Type IIIBelow-grade Fires in Type IIIBelow-grade Fires in Type III
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Below-grade Fires in Type IIIBelow-grade Fires in Type IIIBelow-grade Fires in Type IIIBelow-grade Fires in Type III
If the fire’s intensity prevents access to the basement then fire companies may decide to cut access holes in
the floor near the main body of the fire for the insertion of specialized nozzles such as Bresnan
nozzles and piercing applicators.
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Tactical PrinciplesTactical PrinciplesTactical PrinciplesTactical Principles
The principles outlined in this section are generic and also apply to fires in Type IV and Type V structures. These principles are intended as a
general guide for fire personnel operating on thefireground and are not intended to replace an
officer’s experience and initiative.
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Rescue and EvacuationRescue and EvacuationRescue and EvacuationRescue and Evacuation
Within moments of arriving, the Incident Commander should ensure that an exterior
reconnaissance is completed as part of the initial size-up.
As rescue and life safety are always the first priority, exterior or interior rescue operations are
to be undertaken immediately for the unit of origin, as required.
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Advancing Hose LinesAdvancing Hose LinesAdvancing Hose LinesAdvancing Hose Lines
If the interior occupancy is unknown, then introducing a hose stream into a vent opening will draw air into the structure and push the fire away
from the opening and towards occupants.
Whenever practical, fires are to be fought from the interior unburned side.
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Containing a Fire in a Containing a Fire in a Type III StructureType III Structure
Containing a Fire in a Containing a Fire in a Type III StructureType III Structure
A well-developed fire may seem to be contained to one room, but can migrate into voids before the
fire attack company is aware that it is moving.
The use of a thermal imaging camera and infrared thermometer is a great tool in locating these
hidden fires.
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Coordination of Fire Attack Coordination of Fire Attack and Ventilationand Ventilation
Coordination of Fire Attack Coordination of Fire Attack and Ventilationand Ventilation
Communication is key: Successful fireground operations can’t be undertaken without ensuring that all fire companies understand their task and
are able to seamlessly communicate with all sectors and command.
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RetreatRetreatRetreatRetreat
If the attacking fire company is forced to retreat, then they should do so without turning their
backs on the fire.
Remain calm and in control.
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SalvageSalvageSalvageSalvage
Salvage operations are often ignored or implemented too late in the operation.
A great deal of salvage can be performed before the fire is extinguished.
Salvage is the glimpse of brightness for the owner/occupant on such a sad and dark day. What
ever we can do to help brighten that day will be remembered!
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OverhaulOverhaulOverhaulOverhaul
Because of their age and design, Type III buildings generally tend to have a great deal of
lath andplaster as the interior wall coverings. Exposing the
hidden void spaces in between the studchannels and pulling down ceiling areas within
these buildings is labour-intensive work.
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Ventilation in Type III Ventilation in Type III StructuresStructures
Ventilation in Type III Ventilation in Type III StructuresStructures
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VentilationVentilationVentilationVentilation
Type III roof operations can be one of the most challenging tasks on the fireground.
The roof is a critical area in Type III constructionand must be a priority in the incident action plan.
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Positive Pressure VentilationPositive Pressure VentilationPositive Pressure VentilationPositive Pressure Ventilation
The use of positive pressure fans can assist in reducing interior temperatures, increasing visibility and limit the migration of smoke.
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Roof Operations for Roof Operations for Type III Flat RoofsType III Flat Roofs
Roof Operations for Roof Operations for Type III Flat RoofsType III Flat Roofs
Ventilating a flat roof on a Type III structure will initially require the following equipment:
• Chain saws, circular saws, or axes;• Plaster hooks or pike poles;• A hose line for personnel protection;• Square nose shovel for clearing away roof ballast; and• A thermal imaging camera and heat gun, if available.
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Escape RoutesEscape RoutesEscape RoutesEscape Routes
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Depending on the location of the fire and situation, vertical roof venting should begin with natural openings such as roof vents, hatches, and
skylights.
Roof Operations for Roof Operations for Type III Flat RoofsType III Flat Roofs
(continued) (continued)
Roof Operations for Roof Operations for Type III Flat RoofsType III Flat Roofs
(continued) (continued)
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The roof sector officer should determine the optimum location for a roof vent. Before
ascending to the roof, the officer should be aware of the fire’s location through a reconnaissance of the building and examination for visual indicators
of the fire’s location.
Roof Operations for Roof Operations for Type III Flat RoofsType III Flat Roofs
(continued) (continued)
Roof Operations for Roof Operations for Type III Flat RoofsType III Flat Roofs
(continued) (continued)
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After the hole is cut and the interior ceiling area has been breached, fire personnel should monitor
the effectiveness of the vents through visual observation and by liaising with fire attack.
Roof Operations for Roof Operations for Type III Flat RoofsType III Flat Roofs
(continued) (continued)
Roof Operations for Roof Operations for Type III Flat RoofsType III Flat Roofs
(continued) (continued)
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Trench Cutting ProcedureTrench Cutting ProcedureTrench Cutting ProcedureTrench Cutting Procedure
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Once the trench has been cut, the decking can be left in place to avoid drawing any products of
combustion toward the trench cut. If the fire has taken hold in the cockloft, the decking in thetrench is removed and hose lines directed to
prevent fire spread.
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At every structure fire, ground ladders are to be placed strategically on all sides of the
building and to service floors where fire personnel are conducting fire operations.
Unless a ground ladder is being positioned for a Rapid Intervention Team (RIT), it should be
placed at a 70°angle.
Ground Ladder ConsiderationsGround Ladder ConsiderationsGround Ladder ConsiderationsGround Ladder Considerations
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SectorsSectorsSectorsSectors
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Fire ControlFire ControlFire ControlFire Control
The fire control sector officer directs companies in the Hot Zone to perform search, rescue,
ventilation and fire suppression.
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RITRITRITRIT
The RIT should be staged in a shaded area with SCBA on and turnout clothing open during hot
humid weather and sheltered as close to the scene as possible during cold weather.
Equipment on the RIT tarp shall be for the exclusive use of the RIT.
A dedicated hose line shall also be in place
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Water SupplyWater SupplyWater SupplyWater Supply
During a fire, the water supply sector officer is responsible to manage the
supply pump, tankers and the fill site.
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AccountabilityAccountabilityAccountabilityAccountability
Initial arriving Crews shall operate under Phase I
A minor incident escalates, or initial size-up indicates the safety and accountability of personnel is beyond the span of control of
Command, Phase II shall be established and an accountability officer designated.
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StagingStagingStagingStaging
Staging refers to the use of a temporary stopping place where resources can be assembled before
they are engaged in the incident.
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RehabRehabRehabRehab
Personnel operating at an emergency scene or training exercise shall be sent to the Rehab Sector
after using two air cylinders, or after 30 – 45 minutes of exertion. In extreme weather
conditions, shorter times shall be considered.
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Special ConsiderationsSpecial ConsiderationsSpecial ConsiderationsSpecial Considerations
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Different detached Type III single-family residences and rooming houses can look similar
from the exterior, but have dissimilar interior floor configurations.
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Group Homes, Halfway Houses, Group Homes, Halfway Houses, and Sheltersand Shelters
Group Homes, Halfway Houses, Group Homes, Halfway Houses, and Sheltersand Shelters
Under maximum occupancy loading, the rescue and evacuation requirements may prove
overwhelming for the first arriving companies.
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Row HousingRow HousingRow HousingRow Housing
Fires in Type III row houses have the potential tolast a very long time and typically require
significant commitments of human and physicalresources.
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High Type III Multi‐Residential High Type III Multi‐Residential BuildingsBuildings
High Type III Multi‐Residential High Type III Multi‐Residential BuildingsBuildings
These buildings can be quite large and are generally between three to six storeys in height,
with some even taller.
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Modified Type III BuildingsModified Type III BuildingsModified Type III BuildingsModified Type III Buildings
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Abandoned Type III BuildingsAbandoned Type III BuildingsAbandoned Type III BuildingsAbandoned Type III Buildings
One of the primary questions is whether the Incident Commander decides to undertake primary
search activities.
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SummarySummarySummarySummary
This chapter has explained the characteristics of Type III buildings and some general principles
for responding to fires in them.
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Questions?Questions?Questions?Questions?
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EvaluationEvaluationEvaluationEvaluation
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Question #1Question #1Question #1Question #1
Type III construction is also known as?
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Question #2Question #2Question #2Question #2
Name the three types of collapse.
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Question #3Question #3Question #3Question #3
Explain the importance of coordination between Fire attack and Ventilation
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Question #4Question #4Question #4Question #4
The Rapid Intervention Team shall:
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Question #5Question #5Question #5Question #5
In abandoned buildings, one of the primary questions is whether the Incident Commander decides to undertake primary search activities.
What considerations should be taken into account?