Chapter 20 Flashcards
Cold formed steel (CFS) is used in load bearing walls, non-load bearing walls, floors, and roofs. True or False?
True
The use of CFS members in interior partitions is generally in buildings of what types of construction?
Type I and Type II
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
None of the above
The gravity load supported by CFS members, used in the framing of the backup wall for exterior cladding is small. True or false?
True
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?
More durable against termite and fungal attack
The amount of corrosion protection required in CFS members is generally what?
Varied with the application
The terms G40 and CP40 refer to the same property of CFS members. True or false?
True
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
None of the above
The yield strength of CFS members used in load bearing applications is generally how much ksi?
50ksi
A 20-guage sheet steel is thicker than 22-gauge sheet steel. True or False
True
CFS studs are C-shaped. True or False?
True
Punchouts in CFS studs are generally spaced how many inches on center?
24 inches on center
In the identification mark on a CFS member “362S125-30 (33) G40”, the number 30 implies what?
The thickness of steel sheet used for the member is 0.030inches
The use of bridging channels requires what?
Punched studs
Both a Z-shape CFS section and a hat section are referred to as furring CFS section. True or False?
True
The EQ studs:
a. Use less steel
b. are more fire resistive
c. provide greater sound insulation
d. all of the above
D. all of the above
The strength of sheet steel used for making EQ studs is greater than 50 ksi. True or false?
True
CFS framing for interior gypsum board partitions is designed for a minimum lateral load of how much psf?
5psf
CFS framing for interior gypsum board partitions is designed to a maximum permissible deflection of what?
L/240
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?
gypsum board
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.
a. the assumption of a composite structural behavior is valid.
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?
Fully braced
When bridging channels are required in an interior gypsum board partition, they must be spaced a maximum of how many inches on center?
48 inches on center
The use of two nested top tracks in the framing of an interior gypsum board partition it to?
Absorb the deflection of the overhead structure
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?
Up to a two-story building
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?
A slide clip
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?
type of material used in floor and roof assemblies
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?
False
The anchorage of the bottom track of a load bearing CFS wall to the concrete footing requires what?
A 6 inch long stud material to strengthen the connection
The corner of a load bearing CFS wall requires a minimum of how many studs?
3 studs
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?
False
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?
False
In-line framing in a CFS structure means that the floor joist must what?
The floor joists must align with the studs in the underlying supporting wall
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.
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.
CFS members are made from sheet steel that is provided with corrosion protection before it is formed into shape. True or False
True
CFS members are made by roll forming of what?
Coils of sheet steel
