Chapter 28 Flashcards
The backup wall in a brick veneer wall assembly consists of a :
a. reinforced-concrete wall
b. CMU wall
c. wood or steel stud wall
d. all of the above
e. a nd c
d. all of the above
In a brick veneer wall assembly, the wind loads are transferred directly from the veneer to the buildings structure. True or false?
False
The anchors used to anchor the brick veneer to the backup wall are generally two-piece anchors to allow differential movement between the veneer and the backup:
a. in all three principal directions
b. perpendicular to the plane veneer
c. within the plane of the veneer
d. none of the above
c. within the plane of the veneer
The anchors in a brick veneer wall assembly provide what kind of load support to the veneer?
Lateral load support to the veneer
The minimum required width of the airspace between a brick veneer and CMU backup wall is how many inches?
2 icnhes
The minimum width of the air space generally used between a brick veneer and a wood stud backup wall is how many inches?
1inch
A steel angle used to support the weight of a brick veneer over an opening is called a ?
lintel angle
A shelf angle must be anchored to the building’s structural frame. True or false?
True
A lintel angle must be anchored to the building’s structural frame. True or false?
False
In a multistory building, shelf angles are typically used at ?
each floor level
For a brick veneer that bears on the foundation and continues to the top of the building without any intermediate bearing support, the maximum veneer height is limited to how many feet?
30 ft.
A shelf angle in a brick veneer assembly must proved what type of load support to the veneer?
Gravity load support to the veneer
In a brick veneer assembly, weep holes are required where?
Immediately above the flashing
In a brick veneer assembly, flashing is required:
a. at the foundation level
b. over a lintel angle
c. Over a shelf angle
d. under a window sill
e. all of the above
e. all of the above
The most efficient weep hole in a brick veneer consists of what kind of joint?
Open-head joint
A mortar-capturing device in a brick veneer assembly is used where?
Immediately above the flashing
In a brick veneer assembly with punched windows, vertical expansion joints should be provided at a maximum instance of how many feet in the field of the wall and how many feet from a walls’ corner?
d. 20 ft in the field of the wall and 10 ft from a wall’s corner
A typical anchor used with a rick veneer and CMU backup wall assembly consists of a:
a. two-piece anchor, of which one is embedded in the CMU backup wall and the other is embedded in the veneer’s mortar joint
b. three-piece anchor, of which two are fastened to the CMU backup wall and the other is embedded in the veneer’s mortar joint.
c. two piece anchor, of which one is an integral part of the joint reinforcement in the CMU backup wall and the other is embedded in the veneer’s mortar joint
d. a and c
d. a and c
When lintel angles and shelf angles are combined in the same angle in a brick veneer-clad building, the angle should be treated as a ?
Shelf angle anchored to the structural frame of the building
In general, a CMU-backed brick veneer is more forgiving of construction and workmanship deficiencies than a steel stud backed brick veneer. True or false?
True
In a brick veneer assembly with a steel stud backup wall, the design of studs is generally governed by:
a. the compressive strength of studs to withstand gravity loads.
b. the shortening of studs to withstand gravity loads
c. the bending strength of studs to withstand lateral loads
d. the deflection of studs to withstand lateral loads
d. the deflection of studs to withstand lateral loads
The strength of concrete used in precast concrete curtain walls is generally greater than or equal to how much psi?
5,000psi
Precast concrete curtain wall panels are generally:
a. cast on the construction site
b. fabricated by a ready-mix concrete plant and transported to the construction site
c. a or b
d. none of the above
d. none of the above
The number of bearing supports in a precast concrete curtain wall panel must be:
a. one
b. two
c. three
d. four
e. between three and six
b. two
The structural design of precast concrete curtain wall panels is generally the responsibility of the:
a. structural engineer, who designs the structural frame of the building in which the panels are to be used
b. structural engineer retained by the panel fabricator
c. none of the above
b. structural engineer retained by the panel fabricator
During the erection of precast concrete curtain wall panels, the panels are leveled. The leveling of the panels is provided in the ?
Panels’ bearing supports
The bricks used in brick-faced concrete curtain wall panels are generally:
a. of the same thickness as those used in brick veneer construction
b. thicker than those used in brick veneer construction
c. thinner than those used in brick veneer construction
c. thinner than those used in brick veneer construction
A bond break such as a polyethylene sheet membrane is generally used between the concrete and bricks in a brick-faced precast concrete curtain wall panel. True or false?
False
The connection between the natural stone facing and the backup concrete in a stone-faced precast concrete curtain wall panel is obtained by:
a. the roughness of the stone surface that is in contact with the concrete
b. nonmoving steel dowels
c. flexible steel dowels
d. any one of the above
c. flexible steel dowels
The term GFRC is an acronym for?
Glass fiber-reinforced concrete
A gfrc curtain wall panel consists of:
a. a GRFC skin
b. a cold-formed steel frame
c. anchors
d. all of the above
e. a and b
d. all of the above
The GRFC skin is typically:
a. 2inches to 3 inches thick
b. 1 1/2 inches to 2 1/2 inches thick
c. 1 inch to 2 inches thick
d. 1/2 inch to 3/4 inch thick
e. none of the above
d. 1/2 inch to 3/4 inch thick
The glass fibers used in the GRFC skin are referred to as AR fibers. The term AR is an acronym for ?
Alkali resistant
The anchors used in GRFC panels are typically:
a. two-piece anchors
b. one piece anchors
c. either a or b
d. one of the above
b. one-piece anchors
The GRFC skin ia obtained by:
a. casting the GRFC mix in a mold similar to casting a precast concrete member
b. applying the mix with a trowel
c. spraying the mix over a mold
d. any of the above, depending on the panel fabricator
c. Spraying the mix over a mold
GRFC curtain wall panels are generally lighter than the corresponding precast concrete curtain wall panels.
True or false?
True
