Chapter 20

Question 1

Cold formed steel (CFS) is used in load bearing walls, non-load bearing walls, floors, and roofs. True or False?

Answer 1

True

Question 2

The use of CFS members in interior partitions is generally in buildings of what types of construction?

Answer 2

Type I and Type II

Question 3

CFS members are generally used as framing members in exterior wall cladding in buildings of

a. types I, II, III construction
b. types II, III, and IV construction
c. Types III, IV, and V construction
d. Types I, II, III, IV, V construction
e. None of the above

Answer 3

None of the above

Question 4

The gravity load supported by CFS members, used in the framing of the backup wall for exterior cladding is small. True or false?

Answer 4

True

Question 5

The use of CFS, as an alternative to lumber, in load bearing residential applications, has found favor in some warm humid areas of United States because CFS is what?

Answer 5

More durable against termite and fungal attack

Question 6

The amount of corrosion protection required in CFS members is generally what?

Answer 6

Varied with the application

Question 7

The terms G40 and CP40 refer to the same property of CFS members. True or false?

Answer 7

True

Question 8

The yield strength of CFS members used for interior partitions is generally:

a. 20ksi
b. 30ksi
c. 40 ksi
d. 50 ksi
e. None of the above

Answer 8

None of the above

Question 9

The yield strength of CFS members used in load bearing applications is generally how much ksi?

Answer 9

50ksi

Question 10

A 20-guage sheet steel is thicker than 22-gauge sheet steel. True or False

Answer 10

True

Question 11

CFS studs are C-shaped. True or False?

Answer 11

True

Question 12

Punchouts in CFS studs are generally spaced how many inches on center?

Answer 12

24 inches on center

Question 13

In the identification mark on a CFS member “362S125-30 (33) G40”, the number 30 implies what?

Answer 13

The thickness of steel sheet used for the member is 0.030inches

Question 14

The use of bridging channels requires what?

Answer 14

Punched studs

Question 15

Both a Z-shape CFS section and a hat section are referred to as furring CFS section. True or False?

Answer 15

True

Question 16

The EQ studs:

a. Use less steel
b. are more fire resistive
c. provide greater sound insulation
d. all of the above

Answer 16

D. all of the above

Question 17

The strength of sheet steel used for making EQ studs is greater than 50 ksi. True or false?

Answer 17

True

Question 18

CFS framing for interior gypsum board partitions is designed for a minimum lateral load of how much psf?

Answer 18

5psf

Question 19

CFS framing for interior gypsum board partitions is designed to a maximum permissible deflection of what?

Answer 19

L/240

Question 20

In designing CFS interior gypsum board partitions, we can assume either a composite structural behavior or noncomposite structural behavior. Of the two, noncomposite behaviors is more conservative because it ignores the structural contribution of what?

Answer 20

gypsum board

Question 21

If the gypsum board in a CFS interior partition extends the full height of the partition (i.e., from top track to bottom track) on both sides:

a. the assumption of a composite structural behavior is valid.
b. the assumption of a noncomposite structural behavior is valid.

Answer 21

a. the assumption of a composite structural behavior is valid.

Question 22

If the gypsum board in CFS interior partition extends the full height of the partition (i.e., from top track to bottom track) on both sides, the partition is considered as what?

Answer 22

Fully braced

Question 23

When bridging channels are required in an interior gypsum board partition, they must be spaced a maximum of how many inches on center?

Answer 23

48 inches on center

Question 24

The use of two nested top tracks in the framing of an interior gypsum board partition it to?

Answer 24

Absorb the deflection of the overhead structure

Question 25

The CFS framing for an exterior non load bearing wall used as backup for exterior cladding can either be a bypass framing or an infill framing. The bypass framing can be used for buildings up to how many stories?

Answer 25

Up to a two-story building

Question 26

The CFS framing for an exterior non load bearing wall used as backup for exterior cladding can either be a bypass framing or an infill framing. In bypass framing, the studs are connected to an intermediate floor or roof through what?

Answer 26

A slide clip

Question 27

Two types of buildings with load bearing CFS walls have been identified in the text: (a) CFS building as Type V (B) construction and (b) CFS buildings as Type II (A) construction. The distinction between the two is primarily based on what?

Answer 27

type of material used in floor and roof assemblies

Question 28

WLF walls, CFS walls are assembled on site on the floor of the building and subsequently tilted up and moved into position. True or False?

Answer 28

False

Question 29

The anchorage of the bottom track of a load bearing CFS wall to the concrete footing requires what?

Answer 29

A 6 inch long stud material to strengthen the connection

Question 30

The corner of a load bearing CFS wall requires a minimum of how many studs?

Answer 30

3 studs

Question 31

The top track in a load bearing CFS wall must be doubled in the same way as the top plate in a WLf wall. True or False?

Answer 31

False

Question 32

The top track in a load bearing CFS wall must be doubled in the same way as the top plate in a WLF wall. True or False?

Answer 32

False

Question 33

In-line framing in a CFS structure means that the floor joist must what?

Answer 33

The floor joists must align with the studs in the underlying supporting wall

Question 34

``` The benefit of using load bearing CFS framing instead of loading bearing wood frame in seismic zones is the: a. lighter weight of CFS framing b. Ductility of steel C. greater strength of CFS members d. B and C d. a, b, and c. ```

Answer 34

D. a, b, and c. The benefit of using load bearing CFS framing instead of loading bearing wood frame in seismic zones is the, lighter weight of CFS framing, Ductility of steel, and greater strength of CFS members.

Question 35

CFS members are made from sheet steel that is provided with corrosion protection before it is formed into shape. True or False

Answer 35

True

Question 36

CFS members are made by roll forming of what?

Answer 36

Coils of sheet steel