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BC > Chapter 11 > Flashcards

Chapter 11 Flashcards

1
Q

3 Fundamental safety points

A

Roofs are usually not as strong as floor because they are typically designed to support lighter live loads

Many types of roof construction have inherent concealed spaced between the ceiling and the roof deck making it difficult to determine the extent to which a fire has developed over head

Over time loads may be added to roofs for which they were not originally designed

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2
Q

Low Slope roofs have a slope up to

A

3/12

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3
Q

Medium to high slop roofs have a slope up to

A

4/12 to 12/12

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4
Q

slopes of 18/12 or greater too steep to work from roof ladder is when a fire fighter should think about using

A

aerial apparatus

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5
Q

Clerestories are

A

The vertical sides of this monitor section which are normally openable windows

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6
Q

arched roof structure composed of a series of intersection skewed arches made up of relatively short straight members two members are bolted riveted or welded to a third peace at its center

A

Lamella Arch

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7
Q

what is created using spherical triangulations that is triangles are arranged in three dimensions to for a nearly spherical surface

A

Geodesic domes

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8
Q

Geodesic dome can be constructed with materials indluding

A

Wood
Steel
Concrete
plywood
bamboo
aluminum

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9
Q

what roof is it when the main joists are located at the level of the ceiling and the framework is constructed above the main joist to support the roof deck

A

Inverted roof

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10
Q

4 conventional framing components of roofs are

A

Rafters

Ridge boards

Collar ties

Ceiling joist and rafter ties

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11
Q

the 5 most common roof types constructed with conventional framing include

A

Shed
Gable
Hip
Gambrel
Mansard

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12
Q

conventional roof framing is constructed using substantial materials fasteners common to this type of roof structure include 3

A

Nails and screws at connection points

heavy bolts or brackets in heavy timber construction

architectural hardware for exposed beams

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13
Q

Supports are often substantial with ridge beam

A

Typically one size larger than the rafter

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14
Q

Wood Rafters vary in size from

A

2x4 to 2x14 and can be spaced 12 to 24 inches apart

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15
Q

Wooden trusses sizes are

A

2x4 or 2x6 spaced 2 to 4 feet apart center to center

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16
Q

the top chord tries to straighten out and the bottom chord maintains the shape of the shape of the top chord through tension is wat kind of truss

A

Bowstring truss

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17
Q

Two most common types of trusses used for pitched roof is

A

Fink and Pratt Trusses

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18
Q

The Difference between Fink and Pratt truss is

A

Pratt has a king post in the center while the Fink does not

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19
Q

Wood panel decking may have a thickness of

A

1/2 inch supported 24 inches on center

20
Q

Wood planks will have a minimum thickness

A

1 inch thickness

21
Q

Corrugated steel used in decking rages from _____ thinnest to _______ the thickest

A

29gauge

12 gauge

22
Q

Corrugated steel used in decking depth ranges

A

From 3/4 to 2 inches

23
Q

Vapor Barrier

A

Is designed to reduce the diffusion of interior moisture into the insulation layer

24
Q

3 General categories of roof membranes

A

Built up membranes

Single ply membranes

Fluid applied membranes

25
Q

what uses several overlapping layers of roofing felt saturated with bituminous material that may be either tar or asphalt

A

Built up membranes

26
Q

what consists of a single membrane laid in sheets on the roof deck

A

Single ply membranes

27
Q

Single Ply membranes comes in sheets

A

10 or 20 feet wide and up to 200 feet long

28
Q

Single Ply membranes most common Synthetic rubber material is _____ and other material include _____

A

EPDM

PVC
CPE

29
Q

Fluid applied membranes 4 materials used are

A

Neoprene

Silicone

Polyurethane

Butyl Rubber

30
Q

Most commonly know wear course roofs are

A

Tar and gravel roofs

31
Q

Most common size of asphalt singles are

A

12x36 inches

32
Q

Slate sheets range in size from thinnest to thickest

A

1/16 to 1 1/2 inch

33
Q

Corrugated aluminum or steel primarily used on what 2 kind of buildings

A

Industrial and agricultural building

34
Q

The NFPA standard 256 tests the fire hazards of specific roof covering the test simulates several fire exposure conditions for fires originating outside of the building however does not test for

A

fire resistance of the structural system supporting a roof or the fire resistance of the roof itself with respect to a fire originating within a building

35
Q

Class A roof coverings are

A

Effective against severe fire exposure

36
Q

Class B roof coverings are

A

Effective against a moderate fire exposure

37
Q

Class C roof coverings are

A

Effective against a light fire exposure

38
Q

5 reasons why rain roofs may be installed over existing roofs include

A

To cover deteriorated roofing elements

To change the profile of a building

To update architectural design/appearance

Cost effective compared to replacing the original roof

Less disruptive to the operations within a building as compared to replacing the existing roof

39
Q

Greatest benefit to green roofs are

A

Increase energy efficiency of the building

40
Q

Single unit of solar energy collector is

A

A Cell

41
Q

A series of solar sells arranged in a self contained unit are

A

A Panel

42
Q

A system of solar panels or shingles are

A

A array

43
Q

The Engergy feed from a photovoltaic cells cannot be

A

Isolated or shut off

44
Q

Depth soil for garden roofs vary from

A

Few inches to a few feet

45
Q

Dead loads for garden roofs vary from

A

20 pounds per square foot to 150 pounds per square foot

BC (10 decks)

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