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NASCLA > Concrete > Flashcards

Concrete Flashcards

1
Q

Horizontal and Vertical rebar no farther apart than 3X wall thickness or 18”

A

MISC FACT

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2
Q

Two-Way Slabs: Circular and Polygon-shaped supports to be treated like square supports with the same area

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 119 8.10.1.3

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2
Q

Licensed design professional: responsible for, in charge, of structural design and inspection

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 13-1.7.1

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3
Q

Pile Caps: Overall depth = at least 12”

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 194 13.4.2.1

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4
Q

Structural plain concrete not for us in columns or pile caps

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 195 14.1.5

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5
Q

Minimum thickness of footings cannot be less than 8”

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 197 14.3.2.1

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6
Q

Minimum thickness of bearing walls: Exterior basement and foundations = 7.5”

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 197 14.3.1.1

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7
Q

No welding of stirrups, ties, or inserts to longitudinal bars

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 269 18.2.8.2

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8
Q

At ends of concrete beam, hoop shall be at least 2x height of beam face. Loop #1 = 2” from face of support member

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 270 18.4.2.4

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9
Q

Spacing of loops shall not exceed the smaller of d/4

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 270 18.4.2.4 (a)

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10
Q

Spacing of loops shall not exceed the small of 8x diameter of smallest longitudinal member

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 270 18.4.2.4 (b)

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11
Q

Spacing of loops shall not exceed the smaller of 24x diameter of loop bar

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 270 18.4.2.4 (c)

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12
Q

Spacing of loops shall not exceed 12”

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 270 18.4.2.4 (d)

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13
Q

Exposure categories and classes; class F3 exposed to frequent freezing, thawing and water

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 315 T1.3.1.1

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14
Q

Requirements for concrete by exposure class; shows minimum PSI allowed

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 323 T19.3.2.1

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15
Q

Air content requirements for concrete exposed to freezing and thawing; exception when PSI > 5,000, a reduction of air = 1%

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 324 T19.3.3.1

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16
Q

Prestressing stands, wires and bars

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 330 T20.3.2.2

17
Q

Concrete cover: cast-in-place pretreated concrete members

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 336 T20.6.1.3.2

18
Q

Concrete cover: pre-cast nonprestressed or prestressed manufactured in a plant

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 336 T20.6.1.3.3

19
Q

Deformed rebar coatings: zinc, epoxy, and zinc + epoxy

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 338 20.6.2.1

20
Q

Parallel nonprestressed rebar placed in a horizontal layers, rebar spacing should be a 1”

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 411 25.2.1

21
Q

Parallel nonprestressed rebar placed in 2x or more horizontal layers, rebar supports in upper layer directly over lower supports

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 411 25.2.2

22
Q

Longitudinal reinforcement in columns, pedestals, struts = clear spacing of at least 1.5”

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 411 25.2.3

23
Q

Development of bundled bars (rebar) - in tension or compression - individual bar increased by 20% in 3bar, 33% in 4bar

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 25.6.1.5

24
Q

Spacing of bundled bars (rebar) - bundle bar is equivalent to th area of the diameter of the sum of individual bundled bars

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 25.6.1.16

25
Q

Diameter of Ti bars: for #10 longitudinal bar casing enclosed by #3 rebar

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 25.7.2.2.1

26
Q

Anchorage of circular ties: overlap of 6”, ends terminate with standard hooks to engage longitudinal bars

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 25.7.2.4.1

27
Q

Specifications for cementitious materials: Portland cement = ASTM C150

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 455 T26.4.1.1.1 (a)

28
Q

Quality of water used is satisfactory in natural state, no small, no pronounced taste

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 456 26.4.1.3

29
Q

Fly ash maximum of 25% concentration

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 459 T26.4.2.2 (b)

30
Q

Strength of concrete in post-tensioning and other applications is specified in the contract documents

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 462 R26.4.4.1 (c)

31
Q

Never pump concrete through pipe made of aluminum or aluminum alloys

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 463 R26.5.2.1 (e)

32
Q

Non-high early strength concrete maintained at 50 degrees and moist for 7 days to cure; exception if accelerators are used

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 464 26.5.3.2 (a)

33
Q

High early strength concrete maintained at 50 degrees and moist for 3 days to cure; exception if accelerators are use

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 464 26.5.3.2 (b)

34
Q

Strength test of at least 2x (6”x 12” cylinders) or 3x (4” x 8” cylinders) ASTM C31for curing and ASTM C31 for testing

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 464 R26.5.3. (d)

35
Q

Construction Joints in floors - located in middle of 1/3 of slabs, beams, girders (non-prestressed)

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 466 R26.5.6.2 (b)

36
Q

Construction Joint Offsets - Offset distance 2x width of intersecting beam

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 466 R26.5.6 (c)

37
Q

Compressive strength of concrete 4,000 PSI for multi strand tendons

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 476 R26.10.2 (j)

38
Q

Compressive strength of concrete 2,500 PSI for single strand or bar tendons

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 476 R26.10.2 (j)

39
Q

Oversized anchorage in post-tensioning compensates for lower PSI concrete

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 476 R25.10.2 (k)

40
Q

Forms should be braced and tied to maintain position and shape

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 477 26.1.1.2

41
Q

Frequency of testing : Concrete samples taken not less than 1x per day, or 1x per 150 yards poured, or 1x for each 5,000 sf poured

A

ACI 318-14: Building Code Requirements for Structural Concrete
PG 480 R26.12.2 (a)

NASCLA (23 decks)

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