Question 1

In the identification mark on a CFS member "362S125- 30 (33)G40", the letter S implies that

Accepted Answer

A) it can only be used for a single- story building. 
B) it is made from steel with a strength of 362 ksi. 
C) it is a straight, unbent member. 
D) it is an S- shaped member. 
E) none of the above. 
A) it can only be used for a single- story building. 
B) it is made from steel with a strength of 362 ksi. 
C) it is a straight, unbent member. 
D) it is an S- shaped member. 
E) none of the above.

Question 2

Each cold- formed steel section is stamped with an identification mark, which gives its designation and three additional information items. Which are those additional items?

Accepted Answer

(i)Yield strength of

Question 3

Is the R- value of a wood stud wall with 3- 1/2- in- deep studs and 3- 1/2- in. fiberglass insulation the same as a cold- formed steel (CFS)wall with 3- 1/2- in.- deep studs with the same insulation? Explain your answer.

Accepted Answer

The R- value of a wood stud wa

Question 4

In the identification mark on a CFS member "362S125- 30 (33)G40", the number 30 implies that

Accepted Answer

A) the thickness of steel sheet used for the member is 0.030 in. 
B) it is a 30- in.- long member. 
C) it is a 30- ft- long member. 
D) the thickness of steel used for the member is gauge 30. 
E) none of the above. 
A) the thickness of steel sheet used for the member is 0.030 in. 
B) it is a 30- in.- long member. 
C) it is a 30- ft- long member. 
D) the thickness of steel used for the member is gauge 30. 
E) none of the above.

Question 5

What is deflection track in a cold- formed steel (CFS)stud wall?

Accepted Answer

Deflection track is used as top track in

Question 6

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

Accepted Answer

A) Types III, IV, and V construction. 
B) Types I, II, III, IV, and V construction. 
C) Types I, II, and III construction. 
D) Types II, III, and IV construction. 
E) none of the above. 
A) Types III, IV, and V construction. 
B) Types I, II, III, IV, and V construction. 
C) Types I, II, and III construction. 
D) Types II, III, and IV construction. 
E) none of the above.

Question 7

Which of the following cold- formed steel (CFS)sections is punched with holes-studs, tracks, bridging channels, and furring sections? What is the spacing of punched holes and the reason for it?

Accepted Answer

CFS studs are punche

Question 8

The top track in a load- bearing CFS wall must be doubled in the same way as the top plate in a WLF wall.

Accepted Answer

A) True 
 B)False

Question 9

What is the difference between a CFS member that is hot- dip galvanized and a member that is galv- annealed?

Accepted Answer

Cold-formed steel (CFS) members can be p

Question 10

Non- load- bearing CFS walls in a reinforced concrete or steel frame structures are of two types: interior walls and exterior walls. Interior walls are faced with gypsum board on both sides. Are the exterior walls faced with the same material?

Accepted Answer

The exterior walls are faced w

Question 11

CFS framing for interior gypsum board partitions is designed for a minimum gravity load of

Accepted Answer

A) 5 psf. 
B) 25 psf. 
C) 35 psf. 
D) 15 psf. 
E) none of the above. 
A) 5 psf. 
B) 25 psf. 
C) 35 psf. 
D) 15 psf. 
E) none of the above.

Question 12

Name the three furring sections used in cold- formed steel (CFS)construction.

Accepted Answer

Hat section, resilie

Question 13

In which situations is load- bearing cold- formed steel (CFS)construction preferred for single- family residences?

Accepted Answer

(i)In seismic zones where the

Question 14

The terms G40 and Cp40 refer to the same property of CFS members.

Accepted Answer

A) True 
 B)False

Question 15

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

Accepted Answer

A) more durable against termite and fungal attack. 
B) lower in labor and installation cost. 
C) heavier, and hence stronger. 
D) noncombustible. 
E) all of the above. 
A) more durable against termite and fungal attack. 
B) lower in labor and installation cost. 
C) heavier, and hence stronger. 
D) noncombustible. 
E) all of the above.

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

The term "STUF" is an acronym that includes various cross sections used in cold- formed steel construction. Explain what STUF stands for.

Accepted Answer

"S" stands for stud,

Question 18

In which situations are bridging channels required in a non- load- bearing cold- formed steel wall, such as a partition wall?

Accepted Answer

When the gypsum boar

Question 19

A 20- gauge sheet steel is thicker than 22- gauge sheet steel.

Accepted Answer

A) True 
 B)False

Question 20

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

Accepted Answer

A) gypsum board. 
B) studs. 
C) top track. 
D) bottom track. 
E) all of the above. 
A) gypsum board. 
B) studs. 
C) top track. 
D) bottom track. 
E) all of the above.

Exam 20: Cold-Formed Steel Construction

In the identification mark on a CFS member "362S125- 30 (33)G40", the letter S implies that

Each cold- formed steel section is stamped with an identification mark, which gives its designation and three additional information items. Which are those additional items?

Is the R- value of a wood stud wall with 3- 1/2- in- deep studs and 3- 1/2- in. fiberglass insulation the same as a cold- formed steel (CFS)wall with 3- 1/2- in.- deep studs with the same insulation? Explain your answer.

In the identification mark on a CFS member "362S125- 30 (33)G40", the number 30 implies that

What is deflection track in a cold- formed steel (CFS)stud wall?

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

Which of the following cold- formed steel (CFS)sections is punched with holes-studs, tracks, bridging channels, and furring sections? What is the spacing of punched holes and the reason for it?

The top track in a load- bearing CFS wall must be doubled in the same way as the top plate in a WLF wall.

What is the difference between a CFS member that is hot- dip galvanized and a member that is galv- annealed?

Non- load- bearing CFS walls in a reinforced concrete or steel frame structures are of two types: interior walls and exterior walls. Interior walls are faced with gypsum board on both sides. Are the exterior walls faced with the same material?

CFS framing for interior gypsum board partitions is designed for a minimum gravity load of

Name the three furring sections used in cold- formed steel (CFS)construction.

In which situations is load- bearing cold- formed steel (CFS)construction preferred for single- family residences?

The terms G40 and Cp40 refer to the same property of CFS members.

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

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

The term "STUF" is an acronym that includes various cross sections used in cold- formed steel construction. Explain what STUF stands for.

In which situations are bridging channels required in a non- load- bearing cold- formed steel wall, such as a partition wall?

A 20- gauge sheet steel is thicker than 22- gauge sheet steel.

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

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