Bk 29: Ventilation Techniques Flashcards
If heat, smoke, and fire gases are not released they will accumulate at the highest point of the structure and begin to bank down and spread laterally. This process is known as _________.
Mushrooming
When operating on a LIGHTWEIGHT roof the ventilation team SHALL _______ conduct ventilation operations directly ______ the fire.
Never
over
There are basically only TWO types of ventilation holes:
- __________
- _________
- Heat Hole (offensive)
2. Strip Ventilation (defensive)
A Heat Hole will reduce the possibility of __________ and _________ and will slow down the horizontal spread of fire.
Backdraft
Flashover
A Strip Ventilation should be placed _____ ______ of the fire. The Strip should extend the ________ ________ of the building creating firebreak.
well ahead
entire width
Strip Ventilation must be done in conjunction with a _____ ______.
Heat Hole
Which cut provides the LARGEST hole possible with the MINIMUM amount of cuts?
Center Rafter Cut
Diaphragm Nailing:
Plywood sheather is installed so that the 8 ft. dimension of the plywood crosses the rafters and the 4 ft. dimension __________ the rafters. The sheets are then ___________ like a brick wall.
parallels
staggered
Metal clips used to hold the butted ends of plywood together are called?
H clips
H clips are common on what type of roof?
Pitched Roofs
For Roof Ventilation a MINIMUM of how many ladders should be thrown?
Two ladders
When LOUVERING, once all cuts are complete, use a rubbish hook and push down on the _____ side and pull on the _____ side.
near
far
NAILING BLOCKs will usually be found every ____ ft.
4 ft.
PLUG CUTs are used to determine the Sheathing ____ and ________ of the Roof Composition.
type
thickness
What are the THREE materials used for Floor and Roof Decking?
- Plywood
- Chipboard
- OSB
This cut is used to facilitated the removal of multiple layers of roofing material.
Score Cut
This cut is used on a Panelized Roof when you are performing a cutting technique knowns as Louver of a Purlin.
Skim Cut
SKYLIGHTS on Commerical Buildings will be placed over what areas?
Manufacturing Areas
Smoke Indicator Holes should be placed along the path of access or egress every ____ yards.
few
A long handled Rubbish Hook is recommended over a Pick Head Axe as sounding tool because of its ________ and ______.
Weight and Reach
A Turbine ventilator is about _____% more effective when the Turbine is spinning.
30%
What THREE materials can Vent Pipes be constructed out of?
ABS Plastic
Steel Pipe
Cast Iron
What will a 45-degree Inspection Cut tell you and what can it be used as once complete?
Rafter type and direction
Sheathing type
Thickness of the roof comp
Smoke Indicator Hole
45 Degree Inspection Cut:
Roll over the rafter and continuer the cut for approx. ___ to ___ inches.
6 to 10 inches
This technique is used for cutting 1x4 or 1x6 solid, spaced or diagonal sheathed roofs.
Dicing
________ does not require the cutter to know the exact location of the rafters.
Dicing
DICING:
If needed, the FIRST cut performed is a _____ cut or _____ cut.
Score cut
Head cut
The length of the DICE cut is determined by what?
The Reach of the Tool
The Chain Saw Operator should cut a minimum of _____ Dice Cuts before the Pullers begin to remove sheathing.
3
DICING:
Always leave a minimum of ____ un-pulled section between the cutter and the puller.
1
In order to make a Center Rafter Louver you must first know the _______ ______ and _________ _________.
Rafter Type
Rafter Direction
Center Rafter Louver:
Make a Head Cut to located a minimum of ____ rafters.
3
Center Rafter Louver:
The Head Cut is started by cutting _______ from your ladder to locate your first outside rafter.
away
Center Rafter Louver:
Make a Parallel Cut approx. ___ to ___ inches inside the third inside rafter then louver the section.
2 to 3 inches
Center Rafter Louver:
Make the Bottom Cut ________ your ladder.
towards
Center Rafter Louver AGAINST CONTRUCTION:
Make your Parallel Cut approx. ___ ft. long
3 1/2 ft.
What are the three “OFFENSIVE” Panelized Roof Cutting techniques?
- Drop
- Pull Back
- Offensive Louver
What are the two “DEFENSIVE” Panelized Roof Cutting techniques?
- Louver off a LAM Beam
2. Louver off a Purlin
Panelized Cutting Techniques:
Cut ___ to ____ inches inside of the Purlins to avoid hitting metal hangers.
4 to 6 in.
Louver off a LAM Beam:
While standing on a Lam Beam, reach out approx. ___ ft, and make your first cut ________ to the rafts from Purlin to Purlin.
3 1/2 ft.
parallel
Louver off a LAM Beam:
Because of work area limitations, the Cutter and the Puller should _______ tools before louvering each section.
exchange
Louver off a Purlin:
______ cut over rafters from Lam Beam to Lam Beam.
Skim cut
