Dunn

Question 0

The fire resistance of a floor is directly related to its ____.

Answer 0

Mass

Question 1

What is the structural hierarchy of a floor system. Least critical to most important?

Answer 1

Floor deck
beam
Girder
Column

Question 2

lightweight floor beams can be spaced ____or _____ apart

Answer 2

2’ or 4’

Question 3

What are the 3 ways a floor can fail during a fire

Answer 3

Floor deck collapse
Floor beam collapse
Multi level floor collapse

Question 4

Floor beams supported at each end by bearing walls are called ….?

Answer 4

Simple beams

Question 5

A beam than runs from bearing wall to bearing wall that is supported in the center by a girder and columns is called?…

Answer 5

A continuous beam

Question 6

A beam pulling away from one bearing wall and resting on furnishings or content would be called what type of collapse?

Answer 6

A supported lean-to collapse

Question 7

What would cause an unsupported lean-to collapse?

Answer 7

A bearing wall failure

Question 8

What can cause a tent floor collapse can be caused by..?

Answer 8

An explosion resulting in bearing wall failure

Question 9

Floor collapse resulting from an overloaded center floor would be…?

Answer 9

V-shape floor collapse

Question 10

What can cause a pancake floor collapse?

Answer 10

Shock or impact of a heavy falling object

Question 11

What are three reoccurring factors that lead to floor collapse., ?

Answer 11

Vacant buildings
Renovated buildings
Overloading

Question 12

When is the most dangerous time for floor collapse?

Answer 12

The decay stage, after fire has been extinguished

Question 13

What is more dangerous to firefighters? A bowstring truss roof without a ceiling, or with a ceiling?

Answer 13

With a ceiling

Question 14

Can you attempt to extinguish a fire in the truss loft of a bowstring truss if it has a ceiling below?

Answer 14

No. Exterior attack only

Question 15

Fire in a building with a bowstring truss an no ceiling, can fire be extinguished from the interior?

Answer 15

An attempt is made with a large diameter hose, (capable of reaching 50’ or more to top of truss), if the fire doesn’t go out in the first few SECONDS. An exterior attack must be made.

Question 16

What window should be vented first at a church fire?

Answer 16

The rose window, exp.1

If necessary vent 2&4 stained glass near the fire

Question 17

If fire reaches the attic space at a church fire, members should…?

Answer 17

Discontinue interior attack.