OG 5.23 Attachment #2 Coordinated Vertical Ventilation Flashcards
Vertical ventilation is an effective plan for fires in what three types of situations?
- Single-story buildings
- Top floor fires in multi-storied buildings
- Attic fires
An inspection hole is a diagnostic cut used to determine what three things about rafters?
Type
Direction
Spacing
***Also helps with determining sheathing type and thickness of roof covering
What is the small triangular hole cut through the roof decking?
Smoke indicator hole
A hole place directly over the fire is known as what?
Heat hole
When using a roof scuttle to ventilate what must be evaluated first?
Check to see that they access the space you intend to ventilate.
Skylights are normally placed over what two places on residential apartment building?
Hallways and stairwells
Skylights are normally placed over what areas of commercial buildings?
Manufacturing areas
When making a trench cut which direction should the long sides of the ventilation hole be?
Parallel with the rafters
A heat hole will reduce the horizontal spread of fire as well as the potential for what two conditions?
Flashover
Backdraft
When conducting vertical ventilation operations, firefighters must employ the practice of “trading ______ ___ ____.”
Space for time
On a commercial structure, A good starting point for a ventilation hole size is __’ x __’
4’ x 8’
Spacing for indicator holes shall be placed between the heat hole and the trench cut hole every few _______.
Every few yards
A sufficient trench width can be __” to __”.
24” to 48”. This can be widened if fire conditions dictate.
Personnel should never operate on the “____ ____” of the trench.
Fire side
The Ideal location for a trench cut would be on the fireside of a ______ ____.
Structural wall
When operating on a roof, crews should approach from the _________ side.
Windward side. Visibility and safety are greatly improved when crews can operate outside of smoke.
When the structure has a flat roof, ladders should be placed where?
At the corners
The roof team has the best view of what three things that firefighters on the ground may not see.
- Perimeter of the building
- Civilians in windows
- Shape or layout of the building
On peaked roofs, where is the best place to place ladders?
In close proximity to the desired ventilation hole.
What should be considered a high priority if there is a roof crew on the roof and the second truck arrives?
second means of egress off the roof.
What two types of roofs will require a full roof crew, if not more crews?
Flat roofs
Arched roofs
Determine the need for vertical ventilation before cutting by doing what two things?
- reading the fire and smoke conditions
2. listening for radio reports from interior crews
