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B - General Commercial > Masonry > Flashcards

Masonry Flashcards

1
Q

The standard measurement for a concrete block

A

8” x 8” x 16” ctr. to ctr. Actual is 7-5/8” x 15-5/8”

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2
Q

When estimating for block corners do what?

A

Subtract 1/2 the length of a standard block (8”).

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3
Q

Standard modular brick size

A

2-1/4” x 4” x 8” - when calculating wall thickness, take into account the air space (2”).

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4
Q

Grade SW Brick

A

Highly resistant to frost (foundation courses or retaining walls)

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5
Q

Grade MW Brick

A

Used where there is exposure to temperatures below freezing (face of a wall aboveground)

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6
Q

Garde NW Brick

A

backup on interior masonry

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7
Q

Type FBX Brick

A

Facing bricks - exposed exterior and interior walls and partitions where a high degree of perfection is required.

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8
Q

Modular Unit

A

4”

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9
Q

Standard Modular Brick Size is?

A

3-1/2” x 2-1/4” x 7-1/2”

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10
Q

What is the maximum height of grout lifts?

A

5’

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11
Q

What is a cavity or two-wythe wall?

A

A cavity wall is a two wythe wall that allows each wythe to react independently to stress. The gap is a continuous air space of at least 2”

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12
Q

Composite walls - when ties are used, at least one tie for ever 2-2/3sq.ft of wall is required for No. ____ ties.

A

No. 9

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13
Q

Regular ties in composite wall should be spaced no more than _____ horizontally and ___vertically.

A

36” horizontally
24” vertically

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14
Q

Veneered walls - metal tie size and spacing

A

22 gauge galv. Strips 7/8” wide and spaced 16” vertically and 32” horizontally

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15
Q

4” RBM Curtain vs Panel Wall

A

Curtain wall - must support their own weight for the height of the wall
Panel wall - supported at each story and self supporting between stories

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16
Q

Hallow masonry wall - what is the spandrel?

A

The space between the top of a window of one story to the sill of the window on the second story

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17
Q

Expansion Joint should be applied on a cavity wall on each side of an external corner where the walls are more than ____ in length

A

50’

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18
Q

Steel vs. Concrete Lintel Sizing

A

Steel lintels should extend 4” either side of the opening
Reinforced Concrete lintel should extend at least 8” either side of the opening

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19
Q

What thickness of mortar is needed when placing concrete on hardened concrete or existing rock?

A

1/2” - 1” thick

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20
Q

What is a travertine or keystone finish?

A

Applying a dash coat of mortar over freshly leveled concrete.

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21
Q

If a jack arch is over ______ ft. Wide it should be supported by steel at the opening.

A

2 feet

22
Q

Which compacted mortar joint readily sheds water and just be worked from below?

A

Weathered

23
Q

When corbeling for a masonry ledge or shelf, one is to begin the corbel course by projecting headers out ____ inch beyond the course below.

A

3/4”

24
Q

What is the compressive strength for concrete block made of sand and gravel aggregate?

A

1,200 to 1,800 psi

25
Q

What is the closest an adjustable ladder type brick should be from the edge of the brick?

A

5/8”

26
Q

A _____ inch diameter bar is used for a standard concave mortar joint.

A

5/8”

27
Q

Which type of hydrated lime is recommended for masonry mortar because of the control over unhydrated oxides and plasticity?

A

Type S

28
Q

Which kind of masonry bond has a course of full length headers every fifth to seventh course?

A

Common or American Bond

29
Q

________ on top of a masonry wall prevent moisture from entering the wall.

A

Stop Coping

30
Q

What is the usual capacity of a mortar mixer?

A

4 cubic feet to 7 cubic feet

31
Q

What is the name of an exterior non-load bearing wall that is supported at each story and is self-supporting between stories?

A

Panel Wall

32
Q

Which type of mortar has a very low compressive bond strength and is best used for interior non-loadbearing interior walls?

A

Type K

33
Q

How many cubic meters equal one cubic yard?

A

0.765

34
Q

Masonry saw blades vary from _____ inches to ______ inches in diameter with a blade that is 1/8” thick.

A

6, 24

35
Q

Which type of bond is made up of alternate courses of headers and stretchers?

A

English Bond

36
Q

What is the shape of a block lintel or beam?

A

U

37
Q

Which of the following exterior non-loading bearing walls is NOT supported at each story and can be anchored to both columns and spandrel beams?

A

Curtain

38
Q

The simplest of the basic bonds and largely used in cavity wall and veneer wall construction and consists of all stretchers?

A

Running Bond

39
Q

True or False, FTX unglazed facing tile is NOT suitable for general use in exposed interior masonry walls

A

True

40
Q

Mortar should be both used and set in its final place within?

A

2.5 hours

41
Q

Wall ties should be placed ____ inch from either edge of the masonry unit.

A

5/8”

42
Q

What tool is used most often by a mason to cut brick?

A

A brick hammer

43
Q

What type of joint does not allow for movement across the joint?

A

Construction

44
Q

Under normal conditions, how many part(s) hydrochloric acid is permitted to be used with nine parts water for cleaning of dark brick?

A

One

45
Q

Which joint is made by removing some of the mortar while it is still soft?

A

Raked

46
Q

In masonry work, a _________ is used to finish long horizontal joints.

A

Sled runner

47
Q

A control joint, a continuous vertical joint that has been built into a concrete masonry wall, should be raked out to a depth of ______ inches.

A

3/4”

48
Q

The three face - adjacent is ________ a common fireplace design.

A

NOT

49
Q

By volume, a portland cement/lime mortar mixture should include how many parts of lime?

A

1 Part

50
Q

When required, masonry prism sampling is required for each _______ square feet of wall area in question.

A

5,000 SQFT

51
Q

An expansion joint is to be provided in a brick wythe’s wall every ______ feet or more in length.

A

50 feet

B - General Commercial (9 decks)

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