Ch 11 Flashcards
(117 cards)
1
Q
What was one of the first fire hazards addressed for roofs
A
Thatched roofs
2
Q
What loads are roofs designed to support
A
Live loads
3
Q
What are the 3 types of roofs
A
Flat
Pitched
Curved
4
Q
What way do flat roofs slope
A
Front to rear
5
Q
What do flat roofs facilitate
A
Drainage
6
Q
What is the slope of a low roof
A
3/12
7
Q
What is the slope of a med-high pitched roof
A
4/12-12/12
8
Q
What roof is easiest to work on
A
Flat
9
Q
What buildings have 18/12 or greater roofs
A
Churches
Mansions
10
Q
What determines the design of a roof
A
Climate
Aesthetics
Function
11
Q
What is the simplest pitched roof
A
Shed
12
Q
What roof has 2 inclined surfaces and forms a ridge
A
Gable
13
Q
Which roof slopes in 4 directions
A
Hip
14
Q
What roof slopes in 2 directions and has a break in the slope on each side
A
Gambrel
15
Q
Which roofs have a break on all 4 sides
A
Mansard
16
Q
Which roof has 2 shed roofs
A
Butterfly
17
Q
Which roofs are designed to provide light and ventilation
A
Monitor
18
Q
What buildings are monitor roofs installed on
A
Factory
19
Q
What roof has glass vertical sections that face North
A
Sawtooth
20
Q
What roof is supported by arches and bowstring
A
Curved
21
Q
What is the lemella arch constructed from
A
Lemellas
22
Q
What is lemella most commonly made of
A
Wood
23
Q
What is the thickness range of lemellas
A
2x8-3x16
24
Q
What is length range of lemellas
A
8-14 ft
25
How is a geodesic dome created
Spherical triangulation
26
What is provided in the pitch to create living space
Dormer
27
What beams support flat roofs
Box
| I-beams
28
What is a variation of a flat roof
Inverted
29
What roofs are constructed with conventional framing
```
Shed
Gable
Grambel
Mansard
Hip
```
30
What are rafters commonly made of
Wood
31
What is the size range of rafters
2x4-2x14
32
How far are rafters placed apart
12-24 in
33
Pre-engineered roof framing is known as
Trusses
34
What are the 2 sizes of trusses
2x4
| 2x6
35
How far are trusses apart
2-4ft
36
What trusses are most commonly used in pitched roofs
Bow string
37
What trusses have a curved top chord
Bowstring
38
What materials are used in arches
Masonry
Wood
Steel
39
What is the portion of the deck material is applied
Roof deck
40
What are the components of the roof deck
Sheathing
Planks
Purlins
41
What decking is used for both deck and exterior roof coverings
Corrugated Steel
42
What are the 2 common types of trusses used in pitched roofs
Fink
| Pratt
43
What is the thickness of wood paneling
1/2 in
44
What is the gauge range of corrugated steel
29-12
45
What is the advantage of gypsum
Nailable
46
What type of barrier is used to reduce the moister to insulation
Vapor barrier
47
What are the 3 categories of membranes
Built
Single
Fluid
48
How many layer is common for roof felt
4
49
How wide are rolls of roofing felt
3 ft
50
How long do built up roofs last
20 yrs
51
How wide are sheets of single ply
10 or 20 ft wide
52
How long is the roll for single ply
Up to 200ft
53
How are single ply membrane attached to the roof
Gravel
Adhesive
Mechanical
54
What is the most common synthetic rubber material
EPDM
55
What type of roof is fluid members applied on
Curved/Dome
56
What are the 2 types of roof coverings for pitched roofs
Shingle
| Metal
57
What is thatch primarily used for
Decorative
58
What is the base material for shingles
Fiberglass
59
What is the common size of shingles
12x36
60
What are wooden shingles made from
Tree trunks
61
What trees are wooden shingles made from
Red Cedar
White Cedar
Redwood
62
How are shingles and tiles attached to the roof
Corrosion resistant nails
63
What are the 3 types of tiles
Clay
Slate
Concrete
64
What are the operational problems with tile
Loose
Slippery
Brittle
65
What are slate tiles produced from
Hardened rock
66
How long can slate last
150 yrs
67
What does slate weigh
8-36lbs per sq ft
68
Which tiles are known as mission tiles
Clay
69
What is a major advantage of concrete tiles
Longevity
70
Where are metal roof coverings commonly used
Industrial
| Agriculture
71
What NFPA tests roof coverings
256
72
What is class A covering rating for fire
Severe
73
What is class B covering rating for fire
Moderate
74
What is class C covering rating for fire
Light
75
What is a buildings 1st line of defense against the elements
Roof
76
What type of pitch will a new rain roof have
Steeper
77
What roof increases the efficiency of the building
Green
78
What is a significant hazard of a green roof
Added weight
79
What are reflective systems known as
Cool roofs
80
What are biodiverse roofs known as
Brown roofs
81
What cells are typically shaped like a shingle or panel
Photovoltaic
82
What materials are used for skylights
Plastic
Wired glass
Tempered glass
83
What is the thickness of wood planks
Min 1in
84
What is the depth variation of corrugated steel
3/4-2"
85
What are normally openable windows on monitor roofs called
Clerestories
86
Above how many feet is fireproofing omitted from roof supports in an assembly occupancy
20
87
What is deflection and vibration an indication of
Lightweight roof construction
88
What is the size range of slate
1/16 to
| 1 1/2
89
What tiles have preset nail holes
Slate
90
What occurs when dissimilar metals are in contact
Galvanic corrosion
91
What is a Mansford roof with a flat deck sometimes called
Modern Mansford
92
What roofs are Clerestories found on
Monitor
93
What roofs are found on industrial buildings
Sawtooth
94
What roofs are found on factories
Monitor
95
Which design of truss joint permits rapid spread of fire in directions perpendicular to the truss joist
Open web
96
What truss assembly uses split ring connectors at all joist except the heel plates
Bowstring
97
How far apart are wood nailing strips embedded in the concrete
3 ft
98
What roofing membrane uses a torch to heat the underside of the membrane
Single ply
99
What protects the roof from mechanical abrasion
Wear course
100
Built up roofs that use gravel as the wear course are commonly known as
Tar and gravel
101
What is the dead load weight added by a green roof
20-150 lbs/per sq ft
102
What does a green roof increase
Air quality due to O2 and CO2 exchange
103
What is added to the front of a flat roofed building as an architectural design
False Mansard Front
104
What can be thought of as an arch rotated 360 degrees
A dome
105
What is a keystone
Top point
106
What are lamellas bolted together with
Lamella washer
107
What is the range of thickness for single ply membrane
.03-.10
108
What forces can be visually identified and evaluated
Exterior
109
What forces must be calculated
Interior
110
What will be the last portions of the assembly to fail
Joints
111
What type of frame will the joints be the last to fail under fire conditions
Rigid Frame
112
What is an indication of roof failure
Saggy
113
What is an indication of the roof before failure
Spongy
114
What truss is arranged with all chords in the same plane
Common truss
115
What type of covering is a roof
Waterproof
116
What fails quickly in a fire
Open web joists
117
What are the 2 types of poured insulation
Portland Cement
| Gypsum
