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formwork/piles
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  • 問題数 87 • 10/1/2023

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    問題一覧

  • 1

    What are the three main objectives of good form work?

    safety quality economy

  • 2

    Hydrostatic pressure is directly proportional to ?

    height

  • 3

    Dividing the height of pour by pour time will equal?

    rate of placement

  • 4

    Concrete density multiplied by the rate of placement equals ?

    maximum pressure

  • 5

    The bending of plywood between supports is known as ?

    deflection

  • 6

    Deflection limit for architectural concrete formwork is ?

    1:360

  • 7

    Installing form fly with a face grain parallel to supports can lead to increased ?

    deflection

  • 8

    What tie are used in the cam lock system?

    loop end ties

  • 9

    In the vertical member placed outside The Wailers on the form is called a ?

    strongback

  • 10

    What ties are suited for non-standard wall thickness, or tapered ties?

    coil ties

  • 11

    As lateral pressure increases, what should decrease ?

    tie spacing

  • 12

    What does SWL stand for?

    safe working load

  • 13

    The standard SWL for ties has a safety factor of ?

    2:1

  • 14

    When designing gang forms, consider what 2 factors with the crane?

    capacity and reach

  • 15

    What is a gang form?

    A large form used for pouring walls

  • 16

    What is a fly form?

    A large form used for pouring slabs

  • 17

    More form failures occur in what season than others ?

    winter

  • 18

    The place where a tie is designed to snap is called the ?

    break back point

  • 19

    Increasing bearing area helps in relieving ?

    crushing pressure

  • 20

    When using coil ties, the rod should ?

    Extend through the tie end by one rod diameter

  • 21

    When constructing a rough buck it is good practice to make it ?

    Slightly narrower than the wall

  • 22

    Recess form into a wall is called a ?

    box out

  • 23

    If you are using through ties in your formwork, you must also incorporate the use of ?

    tie sheaths

  • 24

    Columns must be braced to resist ?

    racking

  • 25

    outside core forms should be made to allow for a ?

    Reduction in wall thickness on tall structures

  • 26

    Is essential that inside core forms be ?

    Easily removable

  • 27

    levelling blocks are required for?

    Inside core form in order to keep the shaft plum

  • 28

    On a round wall, the outside length will be ?

    2 x 3.1416 x wt

  • 29

    On a banded column, it is important to ?

    Chase the corner, so the form isn’t distorted

  • 30

    Square forms with fillers are economical way to form ?

    irregular shapes

  • 31

    An optical plum can be used to ensure that a ?

    vertical slip form isn’t drifting

  • 32

    To plumb a slip form, it may be necessary to ?

    Reduce, or increase the Jack rate from one side of the form to the other

  • 33

    When multiple buildings are joined together, care must be taken to avoid ?

    differential settlement

  • 34

    Foundation wall that is wide at the bottom and tapers to a narrow top is called a?

    battered foundation

  • 35

    What is the Alberta building code requirement for ground cover for footings?

    1200mm

  • 36

    The depth of plain concrete footings must be ?

    Equal to, or greater than their projection

  • 37

    Footing reinforcement must be ?

    Supported to ensure proper coverage

  • 38

    The minimum run for a step footing is ? and the maximum rise is?

    600mm 600mm

  • 39

    Widening of the foundation wall is called a

    pilaster

  • 40

    (battered footing) to resist uplift forces. what is installed?

    Ballast is installed around the form for a battered footing

  • 41

    When heavy loads are imposed on a small footprint, what may be used?

    raft foundation

  • 42

    A bored loadbearing cast in place concrete pile is often referred to as a?

    caisson

  • 43

    pile capacity is achieved from either ?

    end bearing or friction

  • 44

    piles can be driven using a?

    drop, diesel or vibrating hammer

  • 45

    In making an end bearing pile a what is used?

    belling tool

  • 46

    Pile reinforcement in a compacted pile is added ?

    after the bulb is complete

  • 47

    Hydraulic drilling is known as?

    jetting

  • 48

    When drilling a pile and sub surface, water or sloughing, is encountered, what must be installed ?

    caisson

  • 49

    When an unstable layer is too deep to use a caisson what type of drilling must you do?

    mud drilling

  • 50

    In soft or loose granular soils what type of pile is used?

    compacted pile

  • 51

    Compacted piles achieve their capacity by ?

    increasing bearing area and soil density

  • 52

    With driven steel or timber piles capacity is achieved when ?

    the target blow count is reached

  • 53

    And advantage of step tapered piles is that they are ?

    Water tight and have large bearing capacity

  • 54

    Sheet piling would be used to make a ?

    cofferdam

  • 55

    To resist, overturning soldier, piles must be ?

    tied back

  • 56

    The rough sawn lumber installed between soldier Piles is called. ?

    lagging

  • 57

    Shallow reinforced concrete wall spanning two or more supports is called a?

    gradebeam

  • 58

    void form can be used to?

    Relieve uplift pressure on a grade beam

  • 59

    pile caps can provide the transition between ?

    Piles and columns

  • 60

    Compacted piles are filled with ?

    dry mix concrete

  • 61

    A type of slab supported directly on top of the column is called a ?

    flat plate slab

  • 62

    Drop panels and capitals are used to counteract ?

    punching shear

  • 63

    Drop panels are ?

    Cast with the slab and capitals are cast with the column

  • 64

    A beam may be supported by a ?

    Column or girder

  • 65

    Flat plate slabs are most commonly used in the construction of ?

    high rise apartments

  • 66

    Void form slabs are designed to ?

    Mimic a wood frame floor system

  • 67

    Stationary slab forming requires the assembly and disassembly of formwork……

    piece by piece

  • 68

    wedges for shoring are typically cut at what ratio?

    1:12

  • 69

    A double pole shore is also known as a ?

    bent

  • 70

    Height adjustments on u heads must be limited to ?

    2/3 overall length

  • 71

    Never mix materials for Shores as they can ?

    React differently under load

  • 72

    Shoring must never be supported on

    Frozen or unstable ground

  • 73

    Placement of decking should minimize waste and?

    Lend itself to strip ability

  • 74

    To minimize deck, deflection lay decking

    Perpendicular to joist and over multiple supports

  • 75

    The next step after removing a fly form is too

    re shore

  • 76

    Three layer rafting is also called

    grillage

  • 77

    Spandrel beams are located around the slab perimeter, and ?

    Supports load from the slab an exterior finishes

  • 78

    Camber is used to counteract

    deflection

  • 79

    The size of a fly form is a dependent on

    Floor layout, and crane capacity

  • 80

    If a beam side is formed with the fly form, it is important to

    Slope the beam side

  • 81

    Narrower fly forms may allow for

    earlier stripping

  • 82

    When suspending formwork from a steel beam, what type of hanger can be used?

    saddle

  • 83

    To reduce the slenderness ratio of Shores, what can be installed?

    lacing

  • 84

    Slenderness ratio maximum unsupported length is calculated by

    Multiplying 50 times the smallest material dimension

  • 85

    Lacing should be installed ?

    Slightly above mid height

  • 86

    c hook is a crane attachment design for flying ?

    table forms

  • 87

    When hooking up a fly form to the crane, you must be

    tied off too structure