Firefighter Pre-Basic VII

The student will demonstrate a basic understanding of forcible entry tools and techniques by applying the material in a practical setting. Session Reference: 7 Topic: Firefighter Pre-Basic VII Level of Instruction: Time Required: 3...


• One 4' X 8' hole has twice area of four 2' X 2' holes

• All roof boards should be cut through before any pulled up

• Keep back to wind when pulling boards

• When all boards ripped up, make opening in ceiling below

---------------------------------

• Special care should be taken when fire is immediately below roof

• Open roof as close as possible to seat of fire

• If not, fire will be drawn across top of building to opening

• Hot spots may develop on roof

• If roof is flat, opening should be made at hot spot

• On gabled roof, opening should extend from hot spot to peak

• Draft can be increased by making an additional opening just above the eave line on side opposite original opening

• Care should be taken so that opening does not increase fire spread

---------------------------------

Forced Ventilation

• Smoke ejectors

• Cannot be used as a substitute for natural venting techniques

• Fans should not be used in partially or completely confined spaces in which there is fire

• May be used in confined areas after fire has been knocked down

---------------------------------

• Fan placement

• Most effective when placed where they tend to increase natural air flow

• When fans are positioned in windows or doorways, all shades, drapes, blinds, curtains, and screens should be removed

• If possible, open area around fan should be closed to increase fan efficiency by directing air through opening and preventing smoke from re-entering

• Be careful not to exhaust smoke into congested areas or into heating and cooling intakes

---------------------------------

• Fans in tandem

• Can be especially effective when used in pairs

• Place one fan near an outside opening blowing smoke out and other inside room to blow smoke to first fan

• Fans can be used to exhaust smoke and draw in fresh air at same time

• Exhaust fan should be mounted high in vent opening

• Intake fan should be lower

---------------------------------

• Positive pressure fans

• Introduction

• Fresh air introduced to increase pressure

• Selective process of opening and closing doors and windows - effective on all structures when doors and windows maintained

• Initiated outside structure

• Has potential of moving fire and fire gases

• Generally speaking, initiated between fire fighters and fire or between fire and trapped victims

• Can maintain primary and secondary egress routes

• Quicker than negative ventilation

• Works well in large areas

---------------------------------

• Fan placement

• Place fan far enough away from door to fill opening with cone of air

• Stacking fans increases volume greatly

• For oversized doors, place fans side by side or in tandem

• For single fan, place 6 to 10' from doorway

• For multiple fans, place 3 to 5' from doorway

---------------------------------

• Fog streams

• Can be used to start venting immediately after fire has been knocked down

• To be most effective, stream should be positioned so fog pattern covers most of window opening

• Hold nozzle few feet inside window

• Observe smoke movement to determine proper position of nozzle

• Fog streams should not be used for venting if they damage

• Items removed for protection

• Outside of fire building or enter adjourning buildings

• Inside of room from which directed

---------------------------------

• They should not cause ice to form outside

• Should be short term operation

Summary

Review:

Firefighter Pre-Basic VII

• Introduction to Entry

• Entry Through Doors and Windows

• Introduction to Ventilation

• Ventilation Techniques