G8-9 Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Deep foundations may have what?

A

piles or caissons going down into bedrock for support

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2
Q

What are bearing piles?

A

wooden, steel, or concrete piles that extend down to bedrock that increase the ability to stabilize and support a structure

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3
Q

Bearing piles are usually driven in?

A

groupings

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4
Q

what is between the bearing pile and the grade beam?

A

Pile cap

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5
Q

Bearing piles are driven down to it hits what?

A

Point of Refusal, witch measures the resistance experienced by the pile driving equipment. An engineer will specify the Point of Refuasl

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6
Q

a measure for wooden pile straightness is called?

A

the pile sweep

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7
Q

Friction piles are what?

A

Piles that transfer a vertical load to the soil around the pile (skin friction)

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8
Q

What species of wood is preferred for wood piles?

A

Pine or Western Red Cedar treated with creosote or other preservatives

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9
Q

what is the swell?

A

It is the displacement of the soil around pile that causes this. causes a mound

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10
Q

Name the parts of the pile top down.

A
Driving ring
Head
Butt
Pile cut off line
Foot
Tip
Pile shoe
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11
Q

What can be used to drive piles in sandy locations?

A

High pressure water forced down the centre of the pile pushing the sand back up and driving the pile

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12
Q

what is constructed first in tilt up construction?

A

The main floor slab and footings

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13
Q

The main floor slab must be?

A

Very strong to withstand a walking crane

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14
Q

what is used for bracing a tilt up form panel?

A

telescoping steel pipe braces

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15
Q

How are the panels bolted together?

A

with steel angle iron

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16
Q

What are the joints between panels filled with?

A

backer rod or rubber insert and caulking

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17
Q

what does it mean too walk the panel?

A

requires the crane to move while carrying the panel

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18
Q

How far down from the top of the floor slab, should the bottom of the panel be?

A

at least 12 inches

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19
Q

what is placed between the footing and panel?

A

Grout Pad

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20
Q

what is used to connect the infill concrete to the wall panel?

A

L shape Reinforcing bars

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21
Q

what is the tolerance for a grout pad?

A

very small plus or minus 0.5mm

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22
Q

how far back is the slab kept back from the footing?

A

4-6 feet

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23
Q

what are the type of forms used to cast pre cast wall panels?

A

Edge Forms

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24
Q

bracing for edge forms should be

A

1x4

25
Q

what kind of panels can be stacked?

A

full panels with no window or doors

26
Q

what is usually required around lifting inserts?

A

extra reinforcing steel

27
Q

what are strong backs used for?

A

provide support for delicate details around windows and doors in wall panels

28
Q

what kind of concrete is used in tilt up?

A

High strength concrete, An accelerator may be added to gain strength quicker and lift the wall quicker

29
Q

what should happen after finishing?

A

immediately apply the curing agent

30
Q

what does a rebound hammer do?

A

spring loaded device with a dowel bounced off the surface. the more the hammer rebounds the stronger the concrete

31
Q

who supervises the lift?

A

A qualified person (does not need to be an engineer)

32
Q

A safety factor of ___ is used with drilled anchors

A

4

33
Q

what are the tops of the wall finished with?

A

cap flashing that continues down onto the roof

34
Q

pilasters are formed with what?

A

pilaster clamps and taper tie assembly

35
Q

temporary bracing must be designed to withstand?

A

winds up too 100km/h

36
Q

Columns have what?

A

steel anchor plates cast into them and are connect to the supports with anchor bolts

37
Q

what is placed between the column plate and the concrete base?

A

layer of expansivegrout

38
Q

how are beams and girders attached to columns?

A

welded with steel angle iron and precast steel members

39
Q

describe cored slab panels

A

used too build floors and roof, hollowed out and can support heavy loads and span long distances

40
Q

topping slab is between ____ and ____ thickness

A

30mm and 150mm

41
Q

What is a Vault used for?

A

housing electrical or mechanical connections

42
Q

explain acrylic base calking

A

applied over damp surface and cures when solvent evaporates, can be painted

43
Q

polysulfide base (rubber base) is used for?

A

sealing pre-cast tilt up panels

44
Q

Butyl Base calking is used for?

A

sealing door and window frames and can be painted

45
Q

backer rod should be ___% thicker then the joint

A

25

46
Q

what two calkings should not be used together?

A

Polyurethane and Polystyrene

47
Q

what is the rate of movement with slip forms?

A

8-18 inches per hour

48
Q

what are the three main components of a slip form?

A

Slipform yoke, hydraulic jack, jacking rod

49
Q

what do yolks support?

A

the walers and the walers support the sheathing

50
Q

wall forms are how tall?

A

only 36-42 inches tall

51
Q

how long has the concrete been in the form before being exposed too the weather?

A

3 hours

52
Q

what type of concrete is used for slip forms?

A

Fast setting mix using high range water reducer and accelerator

53
Q

how thick are the lays of concrete being placed

A

approx. 12 inches

54
Q

gravity dams are built in what size blocks?

A

blocks 70 feet wide and 7 feet thick

55
Q

what seals the joints between blocks?

A

a continuous ruler gasket 1 inch thick

56
Q

what type of anchors are used

A

long anchors with pig tails. 1 1/4 inch diameter

57
Q

the cantilevered truss forms are spaced?

A

12 feet apart

58
Q

what is used to align the panel?

A

panel aligning bolts ant the bottom end of the form

59
Q

what type of cement is used for dams?

A

Type 10, large aggregates, and fly ash to reduce the heat of hydration