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Foundations And Concrete Structures > Foundation Supports > Flashcards

Foundation Supports Flashcards

0
Q

What are the requirements for the floor of a heated crawl space?

A

Must be covered with 50 mm of concrete or an alternative ground cover

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1
Q

How does a crawl space foundation differ from a full basement?

A

A crawl space is not suitable as a living space.

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2
Q

Is the space below a surface foundation slab usable for storage?

A

No. The space below a surface foundation is compacted soil.

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3
Q

Which type of foundation is usually used for an unheated detached garage?

A

Slab on grade. A single layer of concrete placed at or near ground level.

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4
Q

A basement slab is an example of a slab on grade. T or F

A

False. Basements Slabs are normally placed below grade.

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5
Q

What is a slab on grade foundation?

A

A single layer of concrete placed at or near ground level.

Slabs supported on earth.

Location of slab is at or near finished grade.

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6
Q

What kind of settlement must you attempt to prevent in order to avoid problems with door frame alignment (racking) or cracked walls?

A

Unequal or differential settlement

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7
Q

What must be done to fill an existing trench below a footing?

A

Easiest remedy is to fill the trench with concrete

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8
Q

Under what circumstances can footings be eliminated?

A

Footings can be eliminated if the foundation is built on solid rock

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9
Q

What is a basement slab (slab on ground)

A

Basement slabs are normally placed below grade, above the footings and between the foundation walls.

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10
Q

What is a grade beam foundation

A

A grade beam foundation is made up of structural concrete beams at or near finished grade. Supported by a series of individual concrete piles, piers or pad footings that extend below the frost line.

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11
Q

The maximum depth of excavation that is allowed for a straight cut without shoring is _______ metres.

A

1.5

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12
Q

Minimum widths of strip footings supporting exterior walls is 1 floor _____, 2 floors ______, and 3 floors _____.

A

250, 350, ,450

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13
Q

Minimum width of strip footings supporting interior walls. 1 floor _____, 2 floors _____, 3 floors ______.

A

200, 350, 500

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14
Q

Step footings should have a _____ to ______ ratio

A

2 to 1

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15
Q

The Maximum vertical step length for step footings is _______.

A

600 mm

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16
Q

The minimum horizontal measurement for step footings is ______.

A

600 mm

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17
Q

Footings shall be not less than _____ thick.

A

100 mm

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18
Q

A footing is 200 mm thick. How far would the projection of the I reinforced footing be?

A

200

19
Q

A continuous footing that also supports a number of columns is called a _________.

A

Combined footing

20
Q

Which type of soil is recommended as a base for footings?

A

Footings should rest on in disturbed soil, rock or compacted fill.

21
Q

What is the minimum width for the perimeter (strip) footing for a two storey building?

A

350 mm

22
Q

How much wider must a strip footing be to support each storey of interior walls in masonry construction?

A

100 mm

23
Q

What is the minimum depth below finished grade for a foundation in the province of alberta?

A

1.2 m (below frost level)

24
Q

If an excavation under footing is made too deep, what corrective measures must be taken?

A

Placing more concrete, thereby making the footings much thicker.

25
Q

Differences of up to ____ are within acceptable limits for the footings.

A

25 mm

26
Q

The tolerance for out of square once of the actual building corners after the concrete have set is ______.

A

Less than 3 mm or 1/8.

27
Q

Which type of footing is used to support the columns in a residential building?

A

Isolated or pad footings

28
Q

Pad footings for steel teleports are typically square and approximately______ by ______ in size.

A

600 mm by 600 mm

29
Q

To be most effective, reinforcing rods should be placed in the _______ ______ of the footing and at least _______ mm up from the earth and away from side forms.

A 
Bottom third
50 mm (2")
30
Q

The most common method of attaching a concrete foundation wall to the footings is by using a _______.

A

Keyway

31
Q

The wall can also be tied to the foundation. By embedding short lengths of rebar (steel dowels) vertically into the footing. They are normally _____ mm o.c.

A

400 mm

32
Q

Maximum slump allowable for footings is _____ mm

A

150 mm (6”)

33
Q

If concrete is to be placed on alkali, _________ concrete must be used.

A

Sulphate-resistant

34
Q

Never place concrete on frozen ground.

T or F

A

True

35
Q

Concrete must be protected from freezing for a minimum of _____ days.

A

Four

36
Q

Which style of footing is used to support an interior bearing wall?

A

“T” footings

37
Q

Most lending institutions require that a _____ ______ _______ be submitted before any funds are released. A licensed land surveyor must prepare and sign this report.

A

Real property report

38
Q

What is the function of a template as it refers to anchors?

A

A template is used to locate and hold anchors.

39
Q

To be most effective, rebar should be placed ______ the width of footings.

A

Across

40
Q

The top surface of the footings must be level and finished to a smooth surface with a steel trowel. True or false?

A

False. The top surface is brought to level by striking the concrete with a short length of 2x4 and floating with a wood or magnesium flat.

41
Q

What is a pile?

A

A pile is used to support a structure by transferring the buildings loads to a suitable bearing surface below frost.

42
Q

What is a pier?

A

Although similar to a pile, is normally above grade and usually rests on a footing or pile. The centre supporting members of a bridge are called piers.

43
Q

What is a grade beam foundation?

A

A series of piles or pads that support a concrete beam or girder around the perimeter of the building.

44
Q

What are the minimum footing area for columns spaced 3 m on centre for 1 storey, 2 storey and 3 storey builders?

A
  1. 4
  2. 75
  3. 0
45
Q

A heated crawl space must have a ground cover?

A

Yes

46
Q

How does a bearing pile support itself?

A

Extending down to stable bearing

Foundations And Concrete Structures (4 decks)

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