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Building Construction > Ch.9 > Flashcards

Ch.9 Flashcards

1
Q

Primary two metals alloyed in steel are?

A

Iron and carbon

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2
Q

Common structural steel has less than ____ of one percent carbon?

A

3/10ths

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3
Q

Cast iron has a carbon content of __ to __ percent ?

A

3 to 4 %

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4
Q

The rolling process consists of repeatedly passing ingots of steel heated to _______ degrees between large rollers until the intended shape is archived?

A

2,200 degrees F

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5
Q

Common structural steel which contains manganese ,carbon and silicon ?

A

ASTM A36

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6
Q

Yield point stress is reached on A36 steel at _________psi?

A

36,000 psi

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7
Q

Steel alloys with higher yield points have less _________?

A

Ductility

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8
Q

Unrestrained steel beam that is 20 feet long can expand ____ inches when heated ,significantly pushing at lateral constraints?

A

1.4 inches

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9
Q

Steel is a good conductor of heat because it is a heavy material , having a density of around ____ pounds per cubic feet?

A

490

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10
Q

A steel column encased in ___ inches of concrete with a siliceous aggregate would have a fire resistance of ___ hours?

A

3 inches

4 hours

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11
Q

The most commonly used SFRMs are mineral fiber or expanded aggregate coatings such as ____________ and ________?

A

Vermiculite

Perlite

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12
Q

The applied fireproofing for SRFM can vary from 7/8ths to 1 7/8ths to produce a fire resistant rating of ___ to ___ hours?

A

1-4 hours

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13
Q

Asbestos has not been used in SRFMs since the ________?

A

1970s

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14
Q

Cementitious materials have density ranging from ___ to ___ lbs /ft?

A

15 to 50

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15
Q

Gypsum includes approximately ___ percent of entrapped water?

A

20 %

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16
Q

Process of driving free and chemically bound water out of gypsum?

A

Calcination

17
Q

______________ undergo a chemical reaction when exposed to the heat of a fire ?

A

Intumescent materials

18
Q

An intumescent coating will char , foam and expand when heated , the coating material will expand to ___ to ___ times its original volume?

A

15 to 30

19
Q

Intumescent coatings are applied as paint , they have an applied thickness of ___ to ___ inches which is less than the thickness of the spray applied materials?

A

0.03 to 0.4 inches

20
Q

A common used method of protecting a steel floor or roof assembly is the __________________?

A

Membrane ceiling

21
Q

Beam and girder steel frames can be classified as _____, _______, or _____________?

A

Rigid
Simple
Or semi rigid

22
Q

In simple frames the joists are designed primarily to support a _________ force?

A

Vertical

23
Q

________ trusses provide a structural member that can carry loads across greater spans more economically than beams can?

A

Steel

24
Q

Steel trusses are frequently used in three dimensional space frames in which case they are known as ________?

A

Delta trusses

25
Q

Two commonly encountered applications of the basic steel truss are the _________ and the ___________?

A

Joist girder

Open web joist

26
Q

_____________ are mass produced and are available with depths of up to 6feet and span 144 feet?

A

Open web joists

27
Q

When round bars are used for the diagonal members , the open web truss is known as a ________?

A

Bar joist

28
Q

Steel rigid frames usually are used for spans from ____ to ____ feet and are fabricated by welding or bolting together steel shapes and plates ?

A

40 to 200 feet

29
Q

The top of the rigid frame is known as the _______ and the points where the inclined members intersect the vertical members are known as the _____?

A

Crown

Knees

30
Q

Steel arches can be constructed to span distances in excess of ______ feet?

A

300 feet

31
Q

Wire for use in bridge cables can have strengths as high as ___________ psi ?

A

300,000 psi

32
Q

Columns used for structural support in buildings should not have a slenderness ratio greater than ____?

A

120

33
Q

Open web joist floor design in steel frame buildings uses a lightweight concrete with a minimum thickness of ___ inches supported by corrugated steel decking ?

A

2 inches

34
Q

Light gauge steel joists are produced with depths of ____ to ____ inches and can be spaced 16 to 48 inches apart depending on the span and the load to be supported?

A

6 to 12 inches

35
Q

The primary purpose of a ____________ is to strengthen the connection and increase the steel mass at the connection decreasing the possibility of failure?

A

Gusset plates

Building Construction (14 decks)

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