Question 1

Why must the yield strength of EQ studs be higher than 33 ksi-the strength commonly used for regular studs?

Accepted Answer

Because EQ studs are made from thin steel sheet, the screw pull- out resistance is low if made from 33 ksi steel. Therefore, the yield strength of steel sheet in EQ studs is c 50 ksi.

Question 2

Using sketches and notes, explain what bridging channels are, where they are required, and their maximum center- to- center spacing.

Accepted Answer

Bridging channels are structural elements used in construction to provide support and stability to a structure. They are typically required in areas where there is a need to span a gap or provide support for a load, such as in bridges, buildings, or other large structures.

The maximum center-to-center spacing for bridging channels is determined by the specific design requirements of the structure and the materials being used. In general, the spacing should be such that the channels can adequately support the load and distribute it evenly across the structure. This spacing will vary depending on the size and weight of the load, as well as the type of material being used for the channels.

Sketches and notes can be used to illustrate the placement and spacing of bridging channels in a construction project, as well as to calculate the maximum center-to-center spacing based on the specific design requirements. This information is crucial for ensuring the structural integrity and safety of the overall construction project.

Question 3

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

Accepted Answer

A)  provides greater bending strength in the wall.
B)  provides greater fire resistance in the wall.
C)  absorbs the deflection of the overhead structure.
D)  provides greater shear strength in the wall.
E)  seals the partition against the passage of smoke. C

Question 4

The use of CFS members in interior partitions is generally in buildings of

Accepted Answer

A)  Type I construction.
B)  Type II construction.
C)  Type III construction.
D)  Types II and III construction.
E)  Types I and II construction.

Question 5

Punchouts in CFS studs are generally spaced

Accepted Answer

A)  48 in. on center.
B)  24 in. on center.
C)  36 in. on center.
D)  12 in. on center.
E)  none of the above.

Question 6

Explain what G60 means.

Accepted Answer

The answer of Explain what G60 means....

Question 7

The amount of corrosion protection required in CFS members is generally

Accepted Answer

A)  Cp30.
B)  Cp50.
C)  Cp60.
D)  Cp40.
E)  varies with the application.

Question 8

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

Accepted Answer

A)  a slide clip.
B)  two clip angles.
C)  an overhanging clip.
D)  a clip angle.
E)  none of the above.

Question 9

Which of the following two cold- formed steel (CFS)stud walls has a higher R- value? Both walls consist of
3- 1/2- in.- deep studs and 3- 1/2- in.- thick fiberglass insulation. In wall 1, the studs are spaced 24 in. on center and in wall 2, they are spaced 12 in. on center.

Accepted Answer

The answer of Which of the following two cold- formed...

Question 10

The yield strength of CFS members used in load- bearing applications is generally

Accepted Answer

A)  20 ksi.
B)  30 ksi.
C)  40 ksi.
D)  50 ksi.
E)  none of the above.

Question 11

What is difference between a load- bearing member and a non- load- bearing member?

Accepted Answer

The answer of What is difference between a load- bearing...

Question 12

What are EQ studs?

Accepted Answer

The answer of What are EQ studs?...

Question 13

List the building components in which cold- formed steel is used.

Accepted Answer

The answer of List the building components in which cold-...

Question 14

Sketch a typical head- of- wall detail for a non- fire- rated interior drywall partition under a reinforced concrete floor slab.

Accepted Answer

The answer of Sketch a typical head- of- wall detail...

Question 15

Sketch a typical head- of- wall detail for a non- fire- rated interior drywall partition under a steel floor deck. The partition is parallel to deck flutes.

Accepted Answer

The answer of Sketch a typical head- of- wall detail...

Question 16

In which situations must structural steel members be protected using G90 coating?

Accepted Answer

The answer of In which situations must structural steel members...

Question 17

a. What is the minimum lateral load for which an interior drywall partition is designed?
b. What is the maximum permissible deflection (in inches)of an interior drywall partition which is 12 ft high?
c. What is meant by a fully braced drywall partition? Explain using sketches.

Accepted Answer

The answer of a. What is the minimum lateral load...

Question 18

The Steel Stud Manufacturers' Association (SSMA)uses four- part information to designate a cold- formed steel section. Which are those four parts?

Accepted Answer

The answer of The Steel Stud Manufacturers' Association (SSMA)uses four-...

Question 19

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

Accepted Answer

A)  up to a one- story building.
B)  up to a two- story building.
C)  up to a three- story building.
D)  up to a four- story building.
E)  up to any number of stories.

Question 20

What is the minimum corrosion protection and yield strength of steel sheet required for nonstructural cold- formed steel sections?

Accepted Answer

The answer of What is the minimum corrosion protection and...

Exam 20: Cold-Formed Steel Construction