Bk 29: Ventilation Techniques

Question 1

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 _________.

Answer 1

Mushrooming

Question 2

When operating on a LIGHTWEIGHT roof the ventilation team SHALL _______ conduct ventilation operations directly ______ the fire.

Answer 2

Never

over

Question 3

There are basically only TWO types of ventilation holes:

1. __________
2. _________

Answer 3

1. Heat Hole (offensive)

2. Strip Ventilation (defensive)

Question 4

A Heat Hole will reduce the possibility of __________ and _________ and will slow down the horizontal spread of fire.

Answer 4

Backdraft

Flashover

Question 5

A Strip Ventilation should be placed _____ ______ of the fire. The Strip should extend the ________ ________ of the building creating firebreak.

Answer 5

well ahead

entire width

Question 6

Strip Ventilation must be done in conjunction with a _____ ______.

Answer 6

Heat Hole

Question 7

Which cut provides the LARGEST hole possible with the MINIMUM amount of cuts?

Answer 7

Center Rafter Cut

Question 8

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.

Answer 8

parallels

staggered

Question 9

Metal clips used to hold the butted ends of plywood together are called?

Answer 9

H clips

Question 10

H clips are common on what type of roof?

Answer 10

Pitched Roofs

Question 11

For Roof Ventilation a MINIMUM of how many ladders should be thrown?

Answer 11

Two ladders

Question 12

When LOUVERING, once all cuts are complete, use a rubbish hook and push down on the _____ side and pull on the _____ side.

Answer 12

near

far

Question 13

NAILING BLOCKs will usually be found every ____ ft.

Answer 13

4 ft.

Question 14

PLUG CUTs are used to determine the Sheathing ____ and ________ of the Roof Composition.

Answer 14

type

thickness

Question 15

What are the THREE materials used for Floor and Roof Decking?

Answer 15

1. Plywood
2. Chipboard
3. OSB

Question 16

This cut is used to facilitated the removal of multiple layers of roofing material.

Answer 16

Score Cut

Question 17

This cut is used on a Panelized Roof when you are performing a cutting technique knowns as Louver of a Purlin.

Answer 17

Skim Cut

Question 18

SKYLIGHTS on Commerical Buildings will be placed over what areas?

Answer 18

Manufacturing Areas

Question 19

Smoke Indicator Holes should be placed along the path of access or egress every ____ yards.

Answer 19

few

Question 20

A long handled Rubbish Hook is recommended over a Pick Head Axe as sounding tool because of its ________ and ______.

Answer 20

Weight and Reach

Question 21

A Turbine ventilator is about _____% more effective when the Turbine is spinning.

Answer 21

30%

Question 22

What THREE materials can Vent Pipes be constructed out of?

Answer 22

ABS Plastic
Steel Pipe
Cast Iron

Question 23

What will a 45-degree Inspection Cut tell you and what can it be used as once complete?

Answer 23

Rafter type and direction
Sheathing type
Thickness of the roof comp

Smoke Indicator Hole

Question 24

45 Degree Inspection Cut:

Roll over the rafter and continuer the cut for approx. ___ to ___ inches.

Answer 24

6 to 10 inches

Question 25

This technique is used for cutting 1x4 or 1x6 solid, spaced or diagonal sheathed roofs.

Answer 25

Dicing

Question 26

________ does not require the cutter to know the exact location of the rafters.

Answer 26

Dicing

Question 27

DICING:

If needed, the FIRST cut performed is a _____ cut or _____ cut.

Answer 27

Score cut

Head cut

Question 28

The length of the DICE cut is determined by what?

Answer 28

The Reach of the Tool

Question 29

The Chain Saw Operator should cut a minimum of _____ Dice Cuts before the Pullers begin to remove sheathing.

Answer 29

3

Question 30

DICING:

Always leave a minimum of ____ un-pulled section between the cutter and the puller.

Answer 30

1

Question 31

In order to make a Center Rafter Louver you must first know the _______ ______ and _________ _________.

Answer 31

Rafter Type

Rafter Direction

Question 32

Center Rafter Louver:

Make a Head Cut to located a minimum of ____ rafters.

Answer 32

3

Question 33

Center Rafter Louver:

The Head Cut is started by cutting _______ from your ladder to locate your first outside rafter.

Answer 33

away

Question 34

Center Rafter Louver:

Make a Parallel Cut approx. ___ to ___ inches inside the third inside rafter then louver the section.

Answer 34

2 to 3 inches

Question 35

Center Rafter Louver:

Make the Bottom Cut ________ your ladder.

Answer 35

towards

Question 36

Center Rafter Louver AGAINST CONTRUCTION:

Make your Parallel Cut approx. ___ ft. long

Answer 36

3 1/2 ft.

Question 37

What are the three “OFFENSIVE” Panelized Roof Cutting techniques?

Answer 37

1. Drop
2. Pull Back
3. Offensive Louver

Question 38

What are the two “DEFENSIVE” Panelized Roof Cutting techniques?

Answer 38

1. Louver off a LAM Beam

2. Louver off a Purlin

Question 39

Panelized Cutting Techniques:

Cut ___ to ____ inches inside of the Purlins to avoid hitting metal hangers.

Answer 39

4 to 6 in.

Question 40

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.

Answer 40

3 1/2 ft.

parallel

Question 41

Louver off a LAM Beam:

Because of work area limitations, the Cutter and the Puller should _______ tools before louvering each section.

Answer 41

exchange

Question 42

Louver off a Purlin:

______ cut over rafters from Lam Beam to Lam Beam.

Answer 42

Skim cut