Chapter 9

Question 1

Primary two metal alloyed in steel are

Answer 1

Iron

Carbon

Question 2

The 4 Basic properties of steel includes

Answer 2

Strongest of the common building materials

Non Rotting resistant to aging and dimensionally stable

Consisten quality from controlled industrial manufacturing process

relatively expensive but strength and other qualities enable it to be used in smaller quantities that other materials

Question 3

One disadvantage of steel

Answer 3

Is the tendency to rust

Question 4

3 ways to protect steel from rusting are

Answer 4

Painting the surface with a rust inhibiting paint

Coating the matererial with since or aluminum

Adding alloy elements that resist rust

Question 5

3 elements added to increase attributes

Answer 5

Molybdenum -Strength

Vanadium- Strength and toughness

Manganese- Resistance of steel to abrasion

Question 6

Rolling process consist of

Answer 6

Repeatedly passing ingots of steel heated to 2,200f between large rollers untill the intended shape is achieved

Question 7

Cold rolled steel CRS

Answer 7

IS used for member that have a thin cross section such as floor and roof decking and wall studs

Question 8

Unrestrained steel beam 20 feet can expand

Answer 8

1.4 inches

Question 9

Characteristic most significant to the fire service

Answer 9

The deterioration of stell strength at elevated temperatures

Question 10

Temperatures hot enough to weaken steel to its yield point

Answer 10

1,200 f

Question 11

A steel column in asked in 3 inches of concrete with a silicons aggregate would have a fire resistance of

Answer 11

4 hours

Question 12

Sprayed applied fire resistive materials SFRM two most common used are

Answer 12

Mineral fiber

Expanded aggregate coatings such as vermiculite and perlite

Question 13

The applied fire proofing can vary from 7/8 to 1-7/8 to give a rating of

Answer 13

1-4 hours

Question 14

Cementious materials ingredients (4)

Answer 14

Portland cement

Gypsum

Perlite

Vermiculite

Question 15

Intumescent coating will expand

Answer 15

15 to 30 times its original volume

Question 16

Intumescent coating are applied as ____ and have a thickness of

Answer 16

Paint

0.03 to 0.4

Question 17

The use of membrane ceiling can proved a fire rating of

Answer 17

1-3 hours

Question 18

Two commonly encountered application of basic steel truss are

Answer 18

Joist girder

Open web joist

Question 19

Open web joist are mass produced and are available with depths of up to

Answer 19

6 feet and span up to 144 feet

Question 20

More frequently found open web joist depths are

Answer 20

Less than 2 feet and spans up to 40 feet

Question 21

The top of a ridged Fram is call the

Answer 21

Crown

Question 22

The points where the inclined member intersection the vertical member are known as

Answer 22

Knees

Question 23

3 most common colum cross section are

Answer 23

Hollow cylinder

Rectangular tube

Wide Flange shape similar to cross section of an I beam

Question 24

In general columns used for structural support in building should

Answer 24

Not have a slenderness ratio greater then 120

Question 25

Columns that are recited so they cannot rotate at their end have

Answer 25

Fewer tendencies to buckle then those that are free to rotate

Question 26

Steel arches can be constructed to span distances

Answer 26

Greater then 300 feet

Question 27

Steel joist are produced with depth of

Answer 27

6 to 12 inches

Question 28

Steel joist can be spaced

Answer 28

16 to 48 inches apart

Question 29

Fire resistance rating may be eliminated for roof construction when

Answer 29

Located more then 20 feet above the floor or have automatic sprinkler system

Question 30

Three connection types to increase the mass at the point of connect too make it the item to fail within a structural system are

Answer 30

Ridge connections

Gusset plate

Knee joints

Question 31

Knees joints are

Answer 31

The strongest part of the frame and last part to fail

Question 32

Knee joints help

Answer 32

Transfer the roof load to the vertical members