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Carpentry > G4 > Flashcards

G4 Flashcards

1
Q

What kind of surface should slab on grade be placed

A

Well compacted

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2
Q

What factors affect the durability of slabs on grade

A

Compressive strength
Admixtures
Treatment

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3
Q

What factors affect the strength of slabs on grade

A

Compressive strength and proper curing

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4
Q

What should be done to walls or columns that pass through or beside slabs on grade

A

Barrier between slab and footing (caulking or preformed asphalt impregnated material

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5
Q

Why is it important to compact sub grade

A

Provides firm, even bearing

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6
Q

Why are screeds and forms liked before concrete placement

A

Easier to clean

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7
Q

What’s the difference between a flat plate slab and a flat slab

A

Flat plate - stays the same thickness and has no distinguishing features when striped.

Flat slab - column panels have either column capitals or a drop panel or both to support the slab

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8
Q

What advantage do column capitals have

A

More support for the slab

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9
Q

What direction does load-carrying steel span

A

Beam to beam

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10
Q

Dome panels are used in which type of slab

A

Two way ribbed slab

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11
Q

What is a spandrel beam

A

Perimeter beam

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12
Q

What sequence does form stripping usually take place

A

Beam sides, ties, slab shoring and first full size panels

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13
Q

First step in setting a beam form

A

Basic beam support, T-shore or double post.

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14
Q

What must be done to forms for deep girders

A

Studs added to the sides

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15
Q

Why does a spandrel beam require a wider shore head than other beams or girders

A

Because there is no wall support

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16
Q

Where do beam sides usually sit

A

Directly on the shore head

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17
Q

How are wooden t-Shores set

A

1” to 1 1/2” lower so wedging them up level and elevating can be done .

18
Q

How are forks for drop panels supported

A

Rests on joists and stringers and finally on a shore head

19
Q

What is the slenderness ratio

A

1:50

20
Q

Describe a slab table

A

Aluminum truss shoring, stringers and or joist and screw jacks for levelling and a plywood deck

21
Q

What are flying forms

A

Pre fabricated form work lifted in place with a crane

22
Q

How are Aluma beans attached to the false Work

A

Wooden 2x2 or composite material in the top and a groove in the bottom that will accept the head of the bolt to fasten to the scaffold type shoring.

23
Q

What are void forms used for

A

Used to reduce the overall em weight of the slab

24
Q

What type of slab for work uses dome form pans

A

Waffle slab

25
Q

How is a ribbed slab formed

A

With square end pans and tapered pans

26
Q

What is OWSJ

A

Open web steel joist

27
Q

When would FRP be used

A

When doing decorative work - waffle ceilings

28
Q

Why would a waffle slab be used

A

Efficient material wise and good reduction in weight

29
Q

What two basic slabs require the use of pans and domes in form work

A

Ribbed slab (one way) and the waffle slab (two way)

30
Q

What must support concrete joists

A

A beam

31
Q

Most common material for pans used to form ribbed slabs

A

Steel

32
Q

What is a roller

A

Used to allow the slab to be rolled out of the building

33
Q

What are floor jacks

A

Used to lower slab onto the rollers

34
Q

Cable jacks

A

Used to move the slab horizontally out of and into the building.

(Basically come along that has been adapted to be used for moving slab tables)

35
Q

Stripping safety

A

As each section is competed, the materials should be cleaned, oiled and carefully piled in a dry location

36
Q

Types of grade compactors

A

Plate compactor and roller compactor

37
Q

What is megapascals (MPA)

A

Compressive strength of the concrete

38
Q

What are clean outs

A

Slot or opening in bottom of form where you can clean out

39
Q

Materials for one way slab and joist systems

A

Long and tapered pans

40
Q

What kind of steel is used for slab on grade

A

Mesh

Carpentry (8 decks)

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