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Millwright Block 1 Harmonized (NS) > Ladders And Platforms > Flashcards

Ladders And Platforms Flashcards

1
Q

What are the 3 basic types of ladders?

A

Stepladders
Straight ladders
Extension ladders

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2
Q

What are the 3 materials ladders are constructed from?

A

Fibreglass
Wood
Aluminum

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3
Q

What are the benefits of aluminum ladders?

A

Lightweight
Corrosion resistant

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4
Q

What are the benefits of wood ladders?

A

Heavier
Sturdier

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5
Q

What are the benefits of fibreglass ladders?

A

Very durable
Can handle some rough treatment

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6
Q

What ladder grades are used in industry?

A

1
I
Or IA

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7
Q

What is the minimum required overlap for a 11m extension ladder?

A

1m

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8
Q

What is the minimum required overlap for a 15-22m extension ladder?

A

1.5m

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9
Q

How much should a ladder project above the level of landing to which it provides access?

A

1m (3ft)

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10
Q

What is the slope ratio for extension ladders?

A

4:1
(Every 4m up, 1m out)

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11
Q

What classification of ladders may be used for construction purposes?

A

Grade 1

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12
Q

What is the correct incline ratio of an extension ladder resting against a building?

A

4:1

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13
Q

What is the name of the hinged arms between the two sections of a stepladder?

A

Spreaders

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14
Q

On what step of a step ladder must a worker not stand to work?

A

Top two steps

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15
Q

What type of protective finish can be used on a wooden ladder?

A

Clear finish

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16
Q

What type of ladder is free standing?

A

Step ladder

17
Q

What is the centre to centre spacing of the cleats on a single ladder?

A

300mm (10”)

18
Q

What is the minimum size for the side rail of a 3M (10ft) job built single ladder?

A

38 x 89mm (2x4”)

19
Q

How does the length of the extension ladder affect the overlap?

A

Longer the ladder = more overlap

20
Q

What are the 4 basic types of scaffolding?

A

Job built wooden
Job built tube and clamp
Manufactured all round system
Manufactured welded steel frame

21
Q

Why are all round system scaffolding systems used?

A

Allows the scaffold installer to build any size or shape without separate fittings or loose parts

22
Q

When are tube and clamp scaffolds useful?

A

Useful on sloping ground and situations where fixed frame scaffold systems can’t be used

23
Q

When are Jon built wooden scaffolds used?

A

When the area to which access is required is close to the ground.
Useful on sloping ground
Or when steel frame cannot be used

24
Q

How high can wooden scaffolds be?

A

15m (50ft)

25
Q

What are the two types of wooden scaffolds?

A

Single pole
Double pole

26
Q

What is the difference between single and double pole wooden scaffolds?

A

Single - light duty
Double - heavy (and can be used for light)

27
Q

Where are welded steel frame scaffolds commonly used?

A

Construction sites.

28
Q

What are the two main parts to welded steel frame scaffolds

A

End frame
Cross brace

29
Q

How are welded steel frame scaffold that are more than one unit high secured to each other?

A

Locking coupler pins

30
Q

How high does a scaffold need to be to require a guardrail?

A

3M (10ft)

31
Q

At what height does steel scaffolds need to be secured to a building?

A

6.4m (21ft)

32
Q

If a steel scaffolds require to be secured to the building where does the first attachment connect?

A

Within 3x the minimum base dimension
(Usually 4.6m or 15ft)

33
Q

When steel scaffolds need to be secured to a building what is the spacing of the attachments AFTER the first one?

A

Every 6m (20ft)

34
Q

How can you prevent the vertical legs of scaffolds from sinking into a soft surface?

A

Mud sills

35
Q

How much must lumber planks extend beyond the supports of scaffolding?

A

150mm (6in)
But no more than 300mm (12in)

36
Q

At what height must a free standing scaffold be tied off to prevent tipping?

A

3 times the minimum base dimension

Millwright Block 1 Harmonized (NS) (9 decks)

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