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Building Construction > Ch 11 > Flashcards

Ch 11 Flashcards

1
Q

What was one of the first fire hazards addressed for roofs

A

Thatched roofs

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2
Q

What loads are roofs designed to support

A

Live loads

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3
Q

What are the 3 types of roofs

A

Flat
Pitched
Curved

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4
Q

What way do flat roofs slope

A

Front to rear

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5
Q

What do flat roofs facilitate

A

Drainage

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6
Q

What is the slope of a low roof

A

3/12

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7
Q

What is the slope of a med-high pitched roof

A

4/12-12/12

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8
Q

What roof is easiest to work on

A

Flat

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9
Q

What buildings have 18/12 or greater roofs

A

Churches

Mansions

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10
Q

What determines the design of a roof

A

Climate
Aesthetics
Function

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11
Q

What is the simplest pitched roof

A

Shed

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12
Q

What roof has 2 inclined surfaces and forms a ridge

A

Gable

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13
Q

Which roof slopes in 4 directions

A

Hip

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14
Q

What roof slopes in 2 directions and has a break in the slope on each side

A

Gambrel

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15
Q

Which roofs have a break on all 4 sides

A

Mansard

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16
Q

Which roof has 2 shed roofs

A

Butterfly

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17
Q

Which roofs are designed to provide light and ventilation

A

Monitor

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18
Q

What buildings are monitor roofs installed on

A

Factory

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19
Q

What roof has glass vertical sections that face North

A

Sawtooth

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20
Q

What roof is supported by arches and bowstring

A

Curved

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21
Q

What is the lemella arch constructed from

A

Lemellas

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22
Q

What is lemella most commonly made of

A

Wood

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23
Q

What is the thickness range of lemellas

A

2x8-3x16

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24
Q

What is length range of lemellas

A

8-14 ft

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25
Q

How is a geodesic dome created

A

Spherical triangulation

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26
Q

What is provided in the pitch to create living space

A

Dormer

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27
Q

What beams support flat roofs

A

Box

I-beams

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28
Q

What is a variation of a flat roof

A

Inverted

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29
Q

What roofs are constructed with conventional framing

A 
Shed
Gable
Grambel
Mansard 
Hip
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30
Q

What are rafters commonly made of

A

Wood

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31
Q

What is the size range of rafters

A

2x4-2x14

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32
Q

How far are rafters placed apart

A

12-24 in

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33
Q

Pre-engineered roof framing is known as

A

Trusses

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34
Q

What are the 2 sizes of trusses

A

2x4

2x6

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35
Q

How far are trusses apart

A

2-4ft

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36
Q

What trusses are most commonly used in pitched roofs

A

Bow string

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37
Q

What trusses have a curved top chord

A

Bowstring

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38
Q

What materials are used in arches

A

Masonry
Wood
Steel

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39
Q

What is the portion of the deck material is applied

A

Roof deck

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40
Q

What are the components of the roof deck

A

Sheathing
Planks
Purlins

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41
Q

What decking is used for both deck and exterior roof coverings

A

Corrugated Steel

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42
Q

What are the 2 common types of trusses used in pitched roofs

A

Fink

Pratt

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43
Q

What is the thickness of wood paneling

A

1/2 in

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44
Q

What is the gauge range of corrugated steel

A

29-12

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45
Q

What is the advantage of gypsum

A

Nailable

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46
Q

What type of barrier is used to reduce the moister to insulation

A

Vapor barrier

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47
Q

What are the 3 categories of membranes

A

Built
Single
Fluid

48
Q

How many layer is common for roof felt

A

4

49
Q

How wide are rolls of roofing felt

A

3 ft

50
Q

How long do built up roofs last

A

20 yrs

51
Q

How wide are sheets of single ply

A

10 or 20 ft wide

52
Q

How long is the roll for single ply

A

Up to 200ft

53
Q

How are single ply membrane attached to the roof

A

Gravel
Adhesive
Mechanical

54
Q

What is the most common synthetic rubber material

A

EPDM

55
Q

What type of roof is fluid members applied on

A

Curved/Dome

56
Q

What are the 2 types of roof coverings for pitched roofs

A

Shingle

Metal

57
Q

What is thatch primarily used for

A

Decorative

58
Q

What is the base material for shingles

A

Fiberglass

59
Q

What is the common size of shingles

A

12x36

60
Q

What are wooden shingles made from

A

Tree trunks

61
Q

What trees are wooden shingles made from

A

Red Cedar
White Cedar
Redwood

62
Q

How are shingles and tiles attached to the roof

A

Corrosion resistant nails

63
Q

What are the 3 types of tiles

A

Clay
Slate
Concrete

64
Q

What are the operational problems with tile

A

Loose
Slippery
Brittle

65
Q

What are slate tiles produced from

A

Hardened rock

66
Q

How long can slate last

A

150 yrs

67
Q

What does slate weigh

A

8-36lbs per sq ft

68
Q

Which tiles are known as mission tiles

A

Clay

69
Q

What is a major advantage of concrete tiles

A

Longevity

70
Q

Where are metal roof coverings commonly used

A

Industrial

Agriculture

71
Q

What NFPA tests roof coverings

A

256

72
Q

What is class A covering rating for fire

A

Severe

73
Q

What is class B covering rating for fire

A

Moderate

74
Q

What is class C covering rating for fire

A

Light

75
Q

What is a buildings 1st line of defense against the elements

A

Roof

76
Q

What type of pitch will a new rain roof have

A

Steeper

77
Q

What roof increases the efficiency of the building

A

Green

78
Q

What is a significant hazard of a green roof

A

Added weight

79
Q

What are reflective systems known as

A

Cool roofs

80
Q

What are biodiverse roofs known as

A

Brown roofs

81
Q

What cells are typically shaped like a shingle or panel

A

Photovoltaic

82
Q

What materials are used for skylights

A

Plastic
Wired glass
Tempered glass

83
Q

What is the thickness of wood planks

A

Min 1in

84
Q

What is the depth variation of corrugated steel

A

3/4-2”

85
Q

What are normally openable windows on monitor roofs called

A

Clerestories

86
Q

Above how many feet is fireproofing omitted from roof supports in an assembly occupancy

A

20

87
Q

What is deflection and vibration an indication of

A

Lightweight roof construction

88
Q

What is the size range of slate

A

1/16 to

1 1/2

89
Q

What tiles have preset nail holes

A

Slate

90
Q

What occurs when dissimilar metals are in contact

A

Galvanic corrosion

91
Q

What is a Mansford roof with a flat deck sometimes called

A

Modern Mansford

92
Q

What roofs are Clerestories found on

A

Monitor

93
Q

What roofs are found on industrial buildings

A

Sawtooth

94
Q

What roofs are found on factories

A

Monitor

95
Q

Which design of truss joint permits rapid spread of fire in directions perpendicular to the truss joist

A

Open web

96
Q

What truss assembly uses split ring connectors at all joist except the heel plates

A

Bowstring

97
Q

How far apart are wood nailing strips embedded in the concrete

A

3 ft

98
Q

What roofing membrane uses a torch to heat the underside of the membrane

A

Single ply

99
Q

What protects the roof from mechanical abrasion

A

Wear course

100
Q

Built up roofs that use gravel as the wear course are commonly known as

A

Tar and gravel

101
Q

What is the dead load weight added by a green roof

A

20-150 lbs/per sq ft

102
Q

What does a green roof increase

A

Air quality due to O2 and CO2 exchange

103
Q

What is added to the front of a flat roofed building as an architectural design

A

False Mansard Front

104
Q

What can be thought of as an arch rotated 360 degrees

A

A dome

105
Q

What is a keystone

A

Top point

106
Q

What are lamellas bolted together with

A

Lamella washer

107
Q

What is the range of thickness for single ply membrane

A

.03-.10

108
Q

What forces can be visually identified and evaluated

A

Exterior

109
Q

What forces must be calculated

A

Interior

110
Q

What will be the last portions of the assembly to fail

A

Joints

111
Q

What type of frame will the joints be the last to fail under fire conditions

A

Rigid Frame

112
Q

What is an indication of roof failure

A

Saggy

113
Q

What is an indication of the roof before failure

A

Spongy

114
Q

What truss is arranged with all chords in the same plane

A

Common truss

115
Q

What type of covering is a roof

A

Waterproof

116
Q

What fails quickly in a fire

A

Open web joists

117
Q

What are the 2 types of poured insulation

A

Portland Cement

Gypsum

Building Construction (6 decks)

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