Ch. 7 Foundations, Floors, Ceilings, and Walls

Question 1

Base of operations defn

Answer 1

Concept that the platform you are working on, roof or floor, will safely support you

Question 2

Early foundations were made of:

Answer 2

Field stones: Quartz, limestone
Clay bricks
Granite or limestone blocks
And then concrete

Question 3

What type of concrete is used for foundations?

Answer 3

Low slump, high agg, less water, more Portland

Steel is used for large buildings and all basements

Question 4

Name the layers of a lathe and plaster ceiling

Answer 4

Rough coat/scratch coat
Brown coat
Finish coat

Question 5

Where can you find a metal wire mesh and plaster ceiling?

Answer 5

Under facades over public walkway soffits

Difficult to pull with pike pole

Question 6

Common size for drywall

Answer 6

4 X 8 X 1/2”

Can be as big as 4 X 10

Question 7

Interstitial space

Answer 7

Area above a suspended ceiling

Question 8

3 names for suspended ceilings

Answer 8

Dropped, false and grid

Question 9

Plenum space

Answer 9

Area in the interstitial space used for an air return

Question 10

When you see plenum space what should you do

Answer 10

Turn off the HVAC system

Question 11

How far above a roof does a fire Division wall extend?

Answer 11

18”

Question 12

3 materials used for Fire Division Walls

Answer 12

Masonry- best

Brick Noggin-older degrading

Drywall- good if not breached

Question 13

2 types of Party walls and differences

Answer 13

Adjoining-studs next to each other. Good for FR, but not sound

Offset studs-good for sound, but not FR. Offset several inches

Both can extend through the roof and may be LB

Question 14

How does fire travel into Joist spaces in Balloon framing?

Answer 14

The Ribbon boards that are attached to the studs and support the joists

Question 15

How are AFM corners different?

Answer 15

Two studs instead of 3 or 4

Question 16

Types of masonry walls

Answer 16

Clay brick. Two most common
Concrete brick

Stone, marble, granite, limestone

Question 17

4 types of Masonry walls

Answer 17

Unreinforced brick
Reinforced brick
Weight bearing
Veneer

Question 18

Prior to 1935, you can expect masonry walls to be

Answer 18

Unreinforced

Question 19

Pre 33 Masonry walls:

Answer 19

No PC, only lime, sand and water
13” thick
Parapet walls 3-5’ above roofline
Fire cut with lets

Question 20

What did the Longbeach earthquake of 33 do?

Answer 20

Safety codes for better masonry walls

Question 21

1933 Long Beach earthquake caused what changes to construction?

Answer 21

Platform Construction
Steel rebar
9” thick
Anchored in joists and rafters by hangers

Question 22

Posts 59-Tehahapi, ca

Answer 22

4”-6” cap
Parapet 16”
Tie plates every 4’

Question 23

Post 71- Sylmar, ca

Answer 23

Prevent outward collapse
Anchored to floor and roof
Roof had plywood, 1x6 straight sheathing and metal straps

Question 24

Primary collapse hazard in an URM pre 33 building

Answer 24

Front and rear wall, can collapse a distance of 2 X the height

Question 25

King Row

Answer 25

Usually a feature of URM, turned on its side every 4-7 rows,but can be added to an Reinforced era as well for looks

Question 26

Safest part of an URM building is

Answer 26

Corners

Question 27

Clark county

Answer 27

Roof collapse caused tilt wall construction to collapse

Question 28

Pilasters on a tilt wall indicate what?

Answer 28

If only on two sides, they show where the primary roof support members are located. Strong portion of wall for laddering