Chapter 26

Question 1

Historical load-bearing masonry structures were designed with the assumption that:

a. all wind loads on the building were resisted by exterior wall only, and in doing so, they interacted with each other structurally.
b. all winds loads on the building were resisted by exterior walls only, with no structural interaction between them.
c. none of the above

Answer 1

b. all winds loads on the building were resisted by exterior walls only, with no structural interaction between them.

Question 2

Use of the load-bearing masonry wall system became extinct for a while and was revived when?

Answer 2

after World War II

Question 3

The structural behavior of a contemporary load- bearing masonry wall building is similar to that of a:

a. conventional wood light-frame building
b. site-cast reinforced-concrete frame building
c. none of the above

Answer 3

a. conventional wood light-frame building

Question 4

Referring to a masonry wall as a reinforced-masonry wall implies that the wall contains what type of bars?

Answer 4

Vertical reinforcing bars

Question 5

Masonry walls without joint reinforcement are called plain-masonry. True or False?

Answer 5

False

Question 6

A bond beam in a masonry bearing wall building is required for structural reasons:

a. above all openings in exterior walls
b. at each floor level
c. at each floor level and roof level
d. none of the above

Answer 6

c. at each floor level and roof level

Question 7

A bond beam in a masonry bearing wall building must be a what kind of beam?

Answer 7

reinforced-concrete or reinforced-masonry beam

Question 8

A bond beam in a masonry bearing wall building is embedded where?

Answer 8

It is embedded in the wall

Question 9

A typical bond beam is provided with what type of reinforcement ?

Answer 9

Horizontal reinforcement

Question 10

A load -bearing wall structure works best when the floor plan of the building has:

a. walls that are distributed almost uniformly in both principal directions
b. walls at an upper floor that align with the walls at al lower floor.
c. walls that are continuous up from the foundations
d. all of the above

Answer 10

d. all of the above

Question 11

A cellular-type floor plan in multistory building is generally inherent in the following occupancies:

a. residential occupancies
b. business occupancies
c. mercantile occupancies
d. none of the above

Answer 11

a. residential occupancies

Question 12

In a cross-bearing wall structure, the load-bearing walls are:

a. perpendicular to the main axis of the building
b. Parallel to the main axis of the building
c. (a) and (b)
d. none above

Answer 12

a. perpendicular to the main axis of the building

Question 13

Compared to a longitudinal-bearing wall floor plan, a cross-bearing wall floor plan generally gives larger exterior wall openings. True or false?

Answer 13

True

Question 14

The commonly used floor system in high-rise and mid-rise masonry bearing wall buildings in North America is:

a. cast-in-place reinforced-concrete slabs
b. precast-concrete hollow-core slabs
c. all of the above

Answer 14

b. Precast-concrete hollow-core slabs

Question 15

The keyway between precast-concrete hollow-care slabs runs perpendicular to the bearing walls. True or False?

Answer 15

True

Question 16

The keyway between precast-concrete hollow-core slabs is generally:

a. grouted
b. reinforced with horizontal steel dowels
c. reinforced with T-shaped steel dowels
d. (a) and (c)
e. (a) and (b)

Answer 16

e. a and b

Question 17

Where the cutting of masonry units is discouraged, the wall dimensions are based on the masonry module. The module used in CMU walls is how many inches?

Answer 17

8

Question 18

The clear height of openings in CMU walls is?

Answer 18

3/8in. greater than the multiples of the masonry unit module

Question 19

The form work used in constructing site-cast reinforced-concrete walls and floors simultaneously consists of:

a. horizontal and vertical plywood forms
b. sheet steel gang forms
c. sheet steel tunnel forms
d. insulating concrete forms
e. none of the above

Answer 19

c. sheet steel tunnel forms

Question 20

Insulating concrete forms can only be used for:

a. interior load-bearing walls
b. interior of exterior non-load-bearing walls
c. exterior load-bearing walls more than 10in. thick
d. all of the above
e. none of the above

Answer 20

e. none of the above

Question 21

The concrete tilt-up wall construction system is generally used in buildings how tall?

Answer 21

low-rise buildings- 1 to 4 stories

Question 22

The pipe braces that support concrete tilt-up walls are typically removed when?

Answer 22

When all panels have been erected, anchored to the footings, the floor and roof structures have been completed, and the exterior finish to wall panels has been applied.

Question 23

In a tilt-up wall construction system, the walls are:

a. cast in place at the construction site
b. precast in a plan and transported to the construction site for erection
c. precast at the construction site
d. none of the above

Answer 23

c. precast at the construction site

Question 24

The most commonly used strength for concrete for tilt up wall panels is how much psi??

Answer 24

4,000psi

Question 25

The most commonly used strength of concrete for the slab on ground in concrete tilt up wall buildings is?

Answer 25

4,000psi

Question 26

The foundations for concrete tilt up walls consist of:

a. continuous strip footings
b. isolated pad footings
c. drilled pier footings
d. any one of the above

Answer 26

any one of the above

Question 27

During the erection of concrete tilt-up wall panels, a gap is left between the bottom of a panel and the top of the footing. This gap is approximately between how many inches?

Answer 27

1in. to 2 in.

Question 28

The most used method of connecting tilt-up walls to the slab-on-ground is:

a. a continuous steel angle welded to panels and the slab on ground
b. a continuous concrete closure strip in the slab on ground
c. individual steel plates welded to panels ad the slab on ground
d. (a) or (c)
e. (b) or (c)

Answer 28

e. (b) or (c)

Question 29

The adjacent noncorner tilt-up wall panels:

a. are connected using a continuous steel plate extending from the bottom of the panel to its top
b. are connected using 6in. X 6in. steel plates at 6ft on center.
c. should not be connected unless the building is located in a seismic region.
d. should not be connected unless the building is located in a seismic or high-wind region.

Answer 29

d. should not be connected unless the building is located in a seismic or high-wind region.

Question 30

The adjacent corner tilt-up wall panels should be connected together in all situations. True or False

Answer 30

True

Question 31

Reinforced-concrete tilt-up walls are generally used as what?

Answer 31

Load-bearing enclosure walls whereas the interior structure consists of a structural steel frame

Question 32

To provide continuous insulation in a tilt-up wall building, the choice generally is the use of:

a. EIFS cladding on wall panels
b. sandwich tilt-up wall panels
c. masonry veneer cladding with rigid insulation between panels and cladding
d. (a) or (b)
e. (b) or (c)

Answer 32

d. (a) or (b)

Question 33

In a sandwich tilt-up wall panel, the structural wythe of concrete is on the exterior face of the wall. True or false?

Answer 33

False

Question 34

The most commonly used exterior finish on tilt-up wall panels is?

Answer 34

paint