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Brannigan's Building Construction For The Fire Service > Chapter 12 - Fire-Resistive Construction > Flashcards

Chapter 12 - Fire-Resistive Construction Flashcards

1
Q

Fire resistive Construction is considered to be the best because of what two reasons

A

It doesn’t contribute fuel to a fire and is the most resistant to collapse

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2
Q

Concrete after mixed sets but it what

A

Continues to cure indefinitely

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3
Q

What retards the curing of concrete

A

Low temperatures

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4
Q

Concrete is weak in what type of strength

A

Tensile strength

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5
Q

Concrete has what type of shear resistance

A

Poor

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6
Q

Most types of concrete require how many days to obtain full strength

A

28 days

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7
Q

What are the two basic types of concrete construction

A

Cast and place

Precast

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8
Q

Composite construction describes buildings in which

A

Different load-bearing materials are used in different areas

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9
Q

The common cinder block is what type of concrete

A

Precast

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10
Q

What is added to concrete to resist spalling

A

Polypropylene microfibers

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11
Q

What is the chief virtue of concrete

A

High compressive strength and low cost

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12
Q

Concrete beams have zero strength of what

A

Tensile

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13
Q

In a cantilever beam the tension is where

A

Top of the beam

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14
Q

In a continuous beam supported at more than two points tension occurs in the top of the beam where

A

The area over the tops of the columns

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15
Q

In a continuous being supported at more than two points tension occurs in the bottom of the beam where

A

Between the two columns

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16
Q

Vertical reinforcing bars designed to prevent cracking under shear stress

A

Stirrups

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17
Q

Steel has how many times the compressive strength of concrete

A

15

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18
Q

Autoclave aerated concrete is what weight compared to traditional concrete

A

1/4

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19
Q

Many concrete floors are designed as what type of beam

A

Continuous

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20
Q

Concrete floors and what type of buildings may be only load-bearing and may not contribute to the building’s structural stability

A

Precast pinned concrete

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21
Q

Prestressing concrete helps with what type of load

A

Tensile

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22
Q

A major advantage of post tensioning is that floors can be what

A

Thinner

23
Q

What is the general limit of masonry reinforced buildings

A

Six stories

24
Q

Interior and exterior walls are equally load-bearing in what type of construction

A

Reinforced masonry

25
Q

Shores, formwork and lateral bracing

A

False work

26
Q

What percentage of the cost of the concrete structure is formwork

A

60%

27
Q

The setting of concrete is dependent on what

A

Temperature

28
Q

Concrete port at 50° F will develop how much more pressure than at 70° F

A

1/3

29
Q

The length of time for concrete to cure depends on what two things

A

The type of cement used and the temperature during the curing period

30
Q

What is a indication that concrete is not yet up to full strength

A

The presence of reassuring

31
Q

What resistance of post-tension slabs is poor

A

Shear resistance

32
Q

Precast concrete buildings under construction are unstable until

A

All connections are completed

33
Q

What might be the most dangerous hazard for type I buildings under construction

A

Heating most commonly LPG

34
Q

Steal that has been fireproofed is also known as

A

Protected steel

35
Q

What are the two types of individual fireproofing

A

In casement and spraying

36
Q

What type of fireproofing does not protect individual members

A

Membrane

37
Q

The addition of what can significantly affect the fire performance of an assembly

A

Added insulation that’s not part of the specifications

38
Q

What is the most permanent fireproofing

A

Concrete

39
Q

What is the most common encasement method for columns

A

Gypsum board

40
Q

What is one of the fire protection advantages of concrete construction

A

Wax inherent voids

41
Q

If a building is fire resistive it’s presumed that the floor will act as what

A

A barrier to the extension of fire

42
Q

Most imitation concrete panels are made of a

A

Steel framework with asbestos millboard

43
Q

What two purposes does the concrete and fire resistive Construction serve

A

Resist compressive stresses

Protects The tensile strength of the steel from fire

44
Q

All areas were spoiling has reached the reinforcing steel should be what

A

Shored

45
Q

Normal strength concrete loses about 25% of its compressive strength at what temperature

A

575° F

46
Q

Normal strength concrete loses about 75% of its compressive strength at what temperature

A

11, 007° F

47
Q

When a wall formwork burst it usually goes out where

A

At the bottom

48
Q

Where will most victims be in a collapse of false work

A

On top of the false work

49
Q

All cutting into what type of concrete floor is unsafe

A

Post tensions

50
Q

Concrete structures represent a what compared to other structures

A

Massive heat sink

51
Q

What are the two basic types of fire resistive construction

A

Reinforced concrete

Structural steel

52
Q

Was serious fires in fire resistive buildings where is the collapse danger lie

A

Concrete

53
Q

In steel skeleton construction the underside of each floor is what

A

Light gauge corrugated steel sheets

Brannigan's Building Construction For The Fire Service (13 decks)

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