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hcarp1 > G-2 Select Concrete Forming Systems > Flashcards

G-2 Select Concrete Forming Systems Flashcards

1
Q

What is a footing?

A

A concrete member is used under a foundation wall or column to spread the supported weight of the building over a larger area.

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2
Q

What is a Foundation wall?

A

A concrete member that is supported by the footings and supports the above-grade portion of the building.

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3
Q

Fly form?

A

A fly form is a form that is moved with a crane.

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4
Q

Form Sheathing?

A

Form sheathing directly supports the fresh concrete and must be able to resist the force without significant deflection.

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5
Q

Stud?

A

Upright members that support the form sheathing. The spacing of the stud is governed by the allowable deflection of the form sheathing and the rate of pour.

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6
Q

Waler?

A

Horiziontal members that support the form sheathing or studs. If the form system uses single-waler brackets then the walers support the form sheathing.

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7
Q

Tie?

A

A is the load from the waler, that is transferred to the ties by the waler.

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8
Q

Wedge?

A

A wedge is used to secure snap ties.

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9
Q

Strongback?

A

Used to support and line up horizontal walers.

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10
Q

Brace?

A

Used to hold the top of the forms in place and in most cases to keep wall forms plumb.

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11
Q

Stake?

A

Used to hold the bottom of the forms in place and to set elevations of forms. Stakes are also used to anchor the bottom of braces.

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12
Q

Cleat?

A

Normally used to hold the top of the footing forms or wall forms the correct distance apart and function as a low strength tie.

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13
Q

Spacer?

A

Used to hold forms the correct distance apart. Can be used at the bottom of walls or at the top.

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14
Q

Kicker?

A

Vertical 2 by 4 to allow one set of walers to reinforce the other set of walers.

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15
Q

Key and keyway

A

Used to keep the foundation walls laterally anchored to the footings.

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16
Q

Dowel

A

Short piece of reinforcing steel bar

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17
Q

Mushroom Cap

A

Used over rebar ends to guard workers against impalement.

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18
Q

Corbel

A

A corbel is a widening in a wall, often at the top. Structural or decorative purposes.

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19
Q

Ledge

A

A concrete wall with its thickness reduced at the the top to accommodate the floor joists, brickwork or slabs.

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20
Q

What is architectural considerations?

A

Concrete that is left exposed to view.

21
Q

How do most injuries occur in concrete work?

A

Stripping forms

22
Q

What is false work?

A

Temporary support for formwork

23
Q

What is the purpose of form sheathing?

A

Supporting and shaping fresh concrete.

24
Q

What kind of wood is strongest for formwork?

A

Douglas fir

25
Q

Standard form ties are made for use with what thickness of sheathing?

A

19 mm

26
Q

How is loose-forming done?

A

In loose forming, concrete ties are held in place by the walers of some other mechanism designed to support the fresh concrete as well as the forms.

27
Q

The formwork of pre-cast concrete is usually steel, true or false?

A

True

28
Q

What is the purpose of a tie?

A

All ties consist of an internal tension unit to hold the form together and an external holding device to transfer the load from the formwork to the tie.

29
Q

What two kinds of ties are stamped from sheet metal?

A

Strip tie and quick strip

30
Q

What is a coil tie?

A

It has a coil of wire that forms the thread at both ends of the tie.

31
Q

Describe a taper tie.

A

Taper ties are heavy steel rods that are tapered at both ends of the tie.

32
Q

Described overlaid plywood

A

Form ply that has one face covered with resin-impregnated paper.

33
Q

What is commonly done to concrete forms prior to each use?

A

Lubricated with a product that provides for form release.

34
Q

What is an insert?

A

An insert is used to attach other building materials to the concrete

35
Q

What is the purpose of a reglet?

A

Counter flashing fits into the reglet and overlaps roofing material to form a water-tight seal.

36
Q

What is isolation joint?

A

Concrete cast on the ground will settle even if the sub-grade is well compacted. To allow even settling, isolation joints are placed around columns and at the perimeter of slabs. To prevent cracking.

37
Q

What is a Give-And-Take-Strip?

A

Give-And-Take strips are used to isolate one concrete member from another and are designed to allow for vertical and horizontal movement.

38
Q

Expansion joint?

A

Expansion joints are similar to isolation joints, they provide protection against the expansion of concrete due to high temps.

39
Q

Control joints?

A

Control joints expand and contract with changes in temperature, to control haphazard cracking, control joints are used in larger sections of concrete.

40
Q

Tooled joints?

A

Tooled joints are simple to control joints used for concrete sidewalks.

41
Q

Plastic Control Joint Strips?

A

A two-part, T shaped plastic strip

42
Q

Cutting Control Joints?

A

Control joints can be cut using a saw equipped with a diamond-impregnated blade.

43
Q

Construction joint?

A

A construction joint is a surface where two successive placements of concrete meet.

44
Q

Cold joint?

A

A cold joint is an unplanned joint or discontinuity in concrete that results from a delay in the placement of concrete.

45
Q

What is the difference between an isolation joint and control joint?

A

An isolation joint is a joint between members that prevents cracking.

46
Q

What is the minimum depth of a control joint for a slab on grade?

A

1/4 slab thickness.

47
Q

What material is used for a give-and-take strip?

A

Impregnated Fibre Board

48
Q

Describe three ways of making a control joint in a slab-on-grade

A

Tooled, zip strip & slab on grade.

49
Q

What is the purpose of control joint?

A

To control random cracking.

hcarp1 (17 decks)

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