Ch.9

Question 1

Primary two metals alloyed in steel are?

Answer 1

Iron and carbon

Question 2

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

Answer 2

3/10ths

Question 3

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

Answer 3

3 to 4 %

Question 4

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

Answer 4

2,200 degrees F

Question 5

Common structural steel which contains manganese ,carbon and silicon ?

Answer 5

ASTM A36

Question 6

Yield point stress is reached on A36 steel at _________psi?

Answer 6

36,000 psi

Question 7

Steel alloys with higher yield points have less _________?

Answer 7

Ductility

Question 8

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

Answer 8

1.4 inches

Question 9

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

Answer 9

490

Question 10

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

Answer 10

3 inches

4 hours

Question 11

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

Answer 11

Vermiculite

Perlite

Question 12

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

Answer 12

1-4 hours

Question 13

Asbestos has not been used in SRFMs since the ________?

Answer 13

1970s

Question 14

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

Answer 14

15 to 50

Question 15

Gypsum includes approximately ___ percent of entrapped water?

Answer 15

20 %

Question 16

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

Answer 16

Calcination

Question 17

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

Answer 17

Intumescent materials

Question 18

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

Answer 18

15 to 30

Question 19

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?

Answer 19

0.03 to 0.4 inches

Question 20

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

Answer 20

Membrane ceiling

Question 21

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

Answer 21

Rigid
Simple
Or semi rigid

Question 22

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

Answer 22

Vertical

Question 23

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

Answer 23

Steel

Question 24

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

Answer 24

Delta trusses

Question 25

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

Answer 25

Joist girder | Open web joist

Question 26

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

Answer 26

Open web joists

Question 27

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

Answer 27

Bar joist

Question 28

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

Answer 28

40 to 200 feet

Question 29

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 _____?

Answer 29

Crown Knees

Question 30

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

Answer 30

300 feet

Question 31

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

Answer 31

300,000 psi

Question 32

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

Answer 32

120

Question 33

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

Answer 33

2 inches

Question 34

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?

Answer 34

6 to 12 inches

Question 35

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

Answer 35

Gusset plates