Ch. 6: Reading Buildings Flashcards Preview

2022-FD Incident Safety Officer 2nd Ed - JDS > Ch. 6: Reading Buildings > Flashcards

Flashcards in Ch. 6: Reading Buildings Deck (103)
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1
Q

To say that a building collapses without warning is a flawed statement.

A

The ‘warning’ for structural collapse is in the ISOs ability to understand:

  • building construction
  • the effects of fire on the building.
2
Q

What type of explicit detail and their judgment must ISOs be able to give an incident commander?

A

Regarding the collapse potential** of a given building being **attacked by fire.

3
Q

What is imposed on building materials?

A

loads

4
Q

The imposition of a load causes stress on the materials called what?

A

force

5
Q

What is the direction or application of a load to a component?

A

The imposition of the load.

6
Q

What are the three types of load that can be transmitted through a structural member?

A

[ATE] >>> Load

  • Axial Load
  • Torsion Load
  • Eccentric Load
7
Q

3 ways loads are applied to a structural member?

A

Compression, tension, and shear forces [CTS]

8
Q

Mass is heat resistance, and heat resistance is _______.

A

time

9
Q

What are the four basic building material types?

A

Wood, steel, concrete, and masonry.

10
Q

What does it lead to when steel softens, elongates, and sags when heated?

A

collapse

11
Q

Cooling _________ _________ with fire streams is just as important as attacking the fire.

A

structural steel

12
Q

What has excellent tensile, shear, and compressive strength?

A

Steel

13
Q

High factory control; that is, it’s easy to change its shape, increase its strength, and manipulate it during production.

A

Steel

14
Q

What has excellent compressive strength when cured?

A

concrete

15
Q

A pocket of concrete that has crumbled into fine particles through exposure to heat.

A

spalling

16
Q

What can take away the critical mass of the concrete- that is, the mass used for strength?

A

spalling

17
Q

A lateral force that exceeds the compressive forces within a masonry wall causes its ______ ________.

A

quick collapse

18
Q

Brick, concrete block, and stone are general defined as this type of building material.

A

Masonry

19
Q

What is referred to as a combination of the four basic materials?

A

composite

20
Q

Lumber created by gluing and pressing together sheet veneers of wood (in the same grain direction)

A

laminated veneer lumber (lvl)

21
Q

A wood sheeting consisting of wood chips (strands oriented in multiple directions) and an emulsified glue.

A

oriented strand board (osb)

22
Q

What causes failure in “fake beams” aka composite trusses

A

Rapid heating of a composite truss can cause the metal to separate from the wood or glue adhesion to fail

23
Q

Building columns, beams, and connections used to assemble a building.

A

Structural elements

24
Q

To predict collapse.

A

The ISO must constantly evaluate structural elements to determine if they can still transfer the load as designed.

25
Q

Any structural component that transmits a compressive force parallel through its center is called a ________.

A

column

26
Q

A structural element that delivers loads perpendicularly to its imposed load is called a ________.

A

beam

27
Q

What structural component are subject to compressive forces? Examples.

A

columns

Wall or a Post

28
Q

What is the “weak link” in structural failure during fires?

A

the connection

29
Q

What are the three general types of connections?

A

Rigid

Pinned

Gravity

[RPG]

30
Q

What are a series of columns and beams used to hold up a building often referred to as?

A

‘skeletal frame’ or ‘post and beam’

31
Q

Name this type of construction?

‘Structural elements are of an approved noncombustible or limited combustible material with sufficient fire-resistive ratings to withstand the effect of fire and prevent its spread from story to story.’

A

Type I: Fire Resistive

32
Q

What type is typical of concrete-encased steel, monolithic-poured cement, and steel with spray-on fire protection coatings?

A

Type I

33
Q

What type of buildings are often steel and are susceptible to steel deformation and resulting collapse?

A

Type II

34
Q

What type are buildings made of load-bearing brick or concrete block with wood roofs and floors?

A

Type III: Ordinary

35
Q

What is one of the most common uses of Type III?

A

Strip mall with masonry walls and lightweight steel or wood trusses.

36
Q

What are common problems associated with the Type III construction?

A

Void spaces allowing for rapid-fire extension and collapse of lightweight structural elements.

37
Q

What is used to pull back into alignment the sagging or bowing load-bearing walls?

A

decorative stars/ornaments (spreaders)

38
Q

What type of buildings have block or brick exterior load-bearing walls and interior structural members, roofs, and floors, and arches of solid or laminated wood (8”) without concealed spaces?

A

Type IV: Heavy Timber

39
Q

Where are heavy timber buildings mainly used for?

A

Warehouses, manufacturing buildings, and some older churches.

40
Q

What can fire spread in a Heavy Timber building be fast due to?

A

Wide-open areas and content exposure.

41
Q

What is the most common construction type?

A

Type V: Wood Framed

  • homes, new small businesses and chain hotels
42
Q

What type of construction can fire enter the wall space and run straight to the attic?

A

Type V

43
Q

Building analysis during any incident should be cyclic because it is…

A

…. performed on a regular basis as conditions change and time goes by.

44
Q

What is the Five-Step process for predicting collapse?

A

1) Classifying the type of Construction
2) Determining structural Involvement
3) Visualizing and tracing Loads
4) Evaluating Time
5) Predicting and communicating the Collapse Potential

45
Q

What are areas that are exposed to trauma, debris, and/or thrust of a collapse?

A

collapse zone

46
Q

The failure of a roof assembly may impose weight on interior partition walls that were not designed for the load may also be know as…

A

… a “loaded gun,” meaning that the slightest movement could cause an explosive release and collapse.

47
Q

What should be the default for all construction site fires?

A

Defensive operations

48
Q

What is one of the important functions of an ISO?

A

To offer judgment about the collapse potential of buildings during incidents.

49
Q

What is used for the top and bottom chord of the I beam?

A

Laminated veneer lumber (LVL)

50
Q

Which type of connections use bolts and screws?

A

Pinned

51
Q

What material rapidly stress separates at the intersection
of the two materials under fire conditions when combining metal and wood to form a structural element?

A

Metal expands faster than the wood

52
Q

Which type of buildings are most often large, multistoried
structures with multiple exits?

A

Type I

53
Q

Which causes fire spread to be rapid in the Type IV
building?

A

Open spaces

54
Q

What type of attack should be considered when firefighters must work within the established collapse zone area?

A

Flanking approach

55
Q

Which is considered a fake beam due to its lightweight
materials and use of geometric shapes?

A

truss

56
Q

What are 4 ingredients for mortar?

A

Portland Cement
Hydrated Lime
Sand
Water

57
Q

How much can a 100-foot steel beam elongate at 1,000
degrees Fahrenheit?

A

10 inches

58
Q

What accelerates the potential collapse time?

A
  • High surface-to-mass ratio
  • An imposed overload
  • Higher BTU development (fire load)
  • Alterations (undesigned loading)
  • Age deterioration or lack of care/maintenace
  • Firefighting impact loads (fire stream force, accumulated water, forcible entry and ventilation efforts, weight of crews)
  • Breakdown or loss of fire-resistive barriers
59
Q

How thick is the EPS sheet typically?

A

6 to 8 inches

60
Q

What is FiRP made from?

A

Plastic

61
Q

In which step does the ISO “undress” the building when
predicting collapse?

A

3

62
Q

What should be used to determine the structural
involvement of a fire?

A

Smoke and flame

63
Q

What do new lightweight steel homes resemble?

A

Wood frame homes

64
Q

At what point did builders begin to use platform framing
for wood frame buildings?

A

1950’s

65
Q

How are connections loaded for the most part?

A

In shear

66
Q

Which is NOT an ingredient in concrete?

Portland cement

Lime

Sand

Gravel

Water

A

Lime

67
Q

What is the correct progression in the following
assumptions?

A

Mass is heat resistance and heat resistance is time

68
Q

Which type of load can occur in both directions?

A

Shear

69
Q

What is used to protect structural members from fire in a
wood frame building typically?

A

Gypsum board

70
Q

‘Masonry’ is a common term that refers to

A

brick, concrete block, and stone

71
Q

How many times the height of the building should the
collapse zone be as a minimum?

A

1 1/2

72
Q

What is the fire resistive device most often used to
protect the roof structure of the Type II building?

A

Dropped-in ceiling

73
Q

Which type of forces are relied upon to give the masonry
wall its strength?

A

Compressive

74
Q

In Type IV construction what is generally the minimum
dimensions of the members?

A

8 inches

75
Q

Out of the 4 building materials, which has marginal tensile strength?

A

wood

76
Q

What are Type II buildings constructed from more often
than not?

A

Steel

77
Q

What must be used to most effectively predict building
collapse?

A

Knowledge base

78
Q

Which type of connections use reinforced concrete and
welds to bond elements?

A

Rigid

79
Q

What occurs to steel as it is exposed to fire?

A

Softens

80
Q

Which type of load is imposed through the center of the
structural member?

A

Axial

81
Q

What influences fire spread in Type II buildings?

A

Contents

82
Q

What color smoke does unfinished wood that is being
rapidly heated emit?

A

Brown

83
Q

Which truism about predicting collapse is correct?

A

The lighter the structural elements, the faster it comes
down

84
Q

Where must forces be delivered for a building to be
structurally sound?

A

The ground

85
Q

Concrete is a mixture of

A

Portland cement
sand
gravel
water

that cures into a solid mass.

86
Q

What is a structural element that delivers loads
perpendicularly to its imposed load?

A

Beam

87
Q

What can be seen that will alert the firefighter to the
fact that a load-bearing wall has been pulled back into
alignment?

A

Decorative stars on the outside brick wall

88
Q

Which is considered the most common type of construction? Examples?

A

Type V: Wood frame

  • Homes
  • small business
  • hotel chains
89
Q

What is any ‘structural’ element that transmits a
compressive force parallel through its center?

A

Column

90
Q

What is the imposition of loads on building materials
called?

A

Force

91
Q

Which alternative construction type will be most likely to fail fastest under fire conditions?

A

ICF (insulated concrete forming) block

92
Q

What is the first step for predicting collapse?

A

Classify the construction type

93
Q

Which ratio determines the strength of concrete most?

A

Water to Portland cement

94
Q

What is a series of beams placed perpendicularly to trusses to help support roof decking (longitudinal members)?

A

Perlin

95
Q

Which type of beam spans an opening in a load-bearing
masonry wall?

  • such as over a garage or door opening
A

Lintel (aka Header)

96
Q

What is the extension of a wall past the roof?

A

Parapet wall

97
Q

Which type of operation should be default at all
construction site fires?

A

Defensive

98
Q

Which type of beam supports other beams and typically the main horizontal support made of steel, wood, or reinforced concrete?

A

Girder

99
Q

Which type of load tends to pull in opposite directions on
the structural member?

A

Tension

100
Q

What percentage of its strength does cold drawn steel lose at 800 degrees Fahrenheit?

A

55%

101
Q

What are the 5 building types

A
  1. Fire-Resistive
  2. Non-Combustible
  3. Ordinary
  4. Heavy Timber
  5. Wood-Frame
102
Q

Structural Elements are considered

(three components)

A

Columns, Beams & Connections

103
Q

5 Step Process for Predicting Collapse

A

1: Classify Construction Type
2: Determine Structural Involvement (Read smoke & Flames)
3: Visualize and Trace Loads
4: Evaluate time (fire impingement time)
5: Predict and communicate Collapse Potential (collapse zoning)

[CILECp]