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Flashcards in Chapter 4 Building Construction Deck (208)
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1

All trusses constructed prior to the late 1960's have a common code deficiency.

The bottom cord members have inadequate tensile strength to support roof loads allowed by the current existing code.

2

Common building materials include

Wood, Masonry, Metals, Reinforced Concrete, Gypsum, Lath and Plaster, Glass/Fiberglass, Plastic, Composite materials.

3

The most common building material in north america

Wood

4

Two factors that affect how wood react to fire.

Size and moisture content

5

Lumber of small dimensions needs to be protected by.......to increase its resistance or heat and fire.

gypsum or other insulation

6

Wood may be ..........to reduce the speed at which it ignites and burns.

pressure treated with fire-retardant chemicals

7

Green Wood

Wood with high moisture content

8

Pressure treating wood can weaken the woods strength by as much as

25%

9

Roofs, decks, walls, and sub floors are all commonly made of

OSB

10

Includes bricks,stones, and concrete blocks

Masonary

11

These may crack, but they usually retain most of their strength and basic structural stability.

Concrete Blocks

12

Veneer Wall

Walls with a surface layer of attractive material laid over a base of common material.

13

In masonry walls this may become degraded by heat and may show signs of weakening.

Mortar

14

Spalling

Expansion of excess moisture within masonry materials due to exposure to heat of a fire, resulting in tensile forces within the material, and causing it to break apart. May cause explosive pitting or chipping of the materials surface.

15

Metal building materials commonly include

cast iron, steel, aluminum, other metals.

16

Metal building materials are used for

structural support, decorative coverings, stairs, door and window frames, duct work, pipes, and fasteners.

17

The effects of heat and fire on metal materials is dependent on....

Metal type, whether it is exposed or not.

18

Two types of Iron that can be found in North America

Wrought Iron, Cast Iron

19

Commonly used metal in construction in the 1900's.

Cast Iron.

20

With stands heat and fire but may crack if rapidly cooled.

Cast Iron

21

Metal used in construction in the 1800's.

Wrought Iron

22

Used today as decoration on gates, fences, and railings.

Wrought Iron

23

Rivet or welded

Wrought Iron

24

Bolted or screwed

Cast Iron

25

Primary material used for structural support in large modern buildings.

Steel

26

When heated to 1000 degrees a 50 foot steel beam can elongate how many inches?

4

27

Failure of steel members should be expected at how many degrees?

1000

28

Reduces the effect of heat on steel structural members

Spray on concrete or insulation

29

Fire fighter can use ...............to cool steel and prevent or slow down its elongation.

water

30

Curtain wall

A non-load bearing wall, often glass or steel, fixed to the outside of a building and serving especially as cladding.