Construction 9

Question 1

The basic properties of steel.

Answer 1

Strongest of all building material
Non rotting, resistant to aging
Consistent quality
Expensive

Question 2

Steel is basically an alloy of ($$$$) and ($$$).

Answer 2

Iron

Carbon

Question 3

Common structural steel has less than ($$$$$$) carbon

Answer 3

Three tents of one percent

Question 4

($$$$$) capable of being shaped bent or drawn out

Answer 4

Ductile

Question 5

The lower carbon content of steel compared to cast iron results in material that is ($$$$) rather than brittle.

Answer 5

Ductile

Question 6

Steel posses two inherent dis advantages.

Answer 6

Tenancy to rust

Loss of strength when exposed to heat of fire

Question 7

Yield point Steve’s of steel

Answer 7

36000 psi

Question 8

T a temperature of around 1000 degrees the yield point of steel has dropped from 36000 psi to approximately 18000 psi. At 1200 degrees the yield point drops to ($$$$$).

Answer 8

10000 psi a loss of 72%

Question 9

Steel expands as its heated. The amount of expansion for slender members can be determined through a property known as ($$$$$$)

Answer 9

Coefficient of thermal expansion

Question 10

If an unrestrained steel beam is heated to a uniform 1000 degrees it would expand ($$$$$)

Answer 10

1.4 inches

Question 11

Botching yielding and thermal expansion take place simultaneously, However, the tendency of steel to ($$$$$)d, therefore bend or buckle is the more significant concern in most fire situations..

Answer 11

Yield

Question 12

Beams and columns in steel fram buildings are connected by one of two methods ($$$$) or ($$$$)

Answer 12

Bolting

Welding

Question 13

($$$$) open web truss constructed entirely of steel with steel bars used as the web members.

Answer 13

Bar joist

Question 14

Gabled ridged frame
The top of the ridged frame is know as the ($$$$) and the points where the inclined members intersect the vertical e members are known as ($$$$)

Answer 14

Crown

Knees

Question 15

A ($$$$) is constructed as a solid arch that may be built up from angles and webs with a cross section similar to that of a beam.

Answer 15

Girder arch

Question 16

A ($$$$$) s built using truss shapes

Answer 16

Truss arch

Question 17

It is possible to produce wire for use in bridge cables with strengths as high as 300,000 psi

Answer 17

300,000psi

Question 18

A property of a given column known as its ($$$$$) is used in combination itch the condition of the column end to determine the load that it can safely support without buckling.

Answer 18

Slenderness ratio

Question 19

The higher the numerical value of the slenderness ratio, the more likely it is to buckle. Columns used for structural support should not have a slenderness ratio of greater than ($$$$)

Answer 19

120

Question 20

Ther are three methods by which steel structural member can be used to support floors in multi storied buildings.

Answer 20

Open web joist or trusses
Steel beams
Light gauge steel joist

Question 21

The steel joist are produced with depths of ($$$$) and can be spaced ($$$$) apart

Answer 21

6 to 12 inches

16 to 48 inches apart

Question 22

Two factors that effect the possible failure of steel

Answer 22

Mass of the steel member

Structural design used

Question 23

In gabled ridged frame structure the ($$$$) between the roof and the wall will be the strongest part of the frame and the last part to fail

Answer 23

Knee joint

Question 24

A steel column encased with 3 inched of concrete will a siliceous aggregate will have a ($$$$) fire resistance rating

Answer 24

4 hour

Question 25

Gypsum consist of ($$$) trapped water

Answer 25

21%

Question 26

Gypsum. The wat turns to steam when exposed to fire and in doing so absorbs heat. This process is known as

Answer 26

Calcination