Ladders And Platforms

Question 1

What are the 3 basic types of ladders?

Answer 1

Stepladders
Straight ladders
Extension ladders

Question 2

What are the 3 materials ladders are constructed from?

Answer 2

Fibreglass
Wood
Aluminum

Question 3

What are the benefits of aluminum ladders?

Answer 3

Lightweight
Corrosion resistant

Question 4

What are the benefits of wood ladders?

Answer 4

Heavier
Sturdier

Question 5

What are the benefits of fibreglass ladders?

Answer 5

Very durable
Can handle some rough treatment

Question 6

What ladder grades are used in industry?

Answer 6

1
I
Or IA

Question 7

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

Answer 7

1m

Question 8

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

Answer 8

1.5m

Question 9

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

Answer 9

1m (3ft)

Question 10

What is the slope ratio for extension ladders?

Answer 10

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

Question 11

What classification of ladders may be used for construction purposes?

Answer 11

Grade 1

Question 12

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

Answer 12

4:1

Question 13

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

Answer 13

Spreaders

Question 14

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

Answer 14

Top two steps

Question 15

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

Answer 15

Clear finish

Question 16

What type of ladder is free standing?

Answer 16

Step ladder

Question 17

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

Answer 17

300mm (10”)

Question 18

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

Answer 18

38 x 89mm (2x4”)

Question 19

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

Answer 19

Longer the ladder = more overlap

Question 20

What are the 4 basic types of scaffolding?

Answer 20

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

Question 21

Why are all round system scaffolding systems used?

Answer 21

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

Question 22

When are tube and clamp scaffolds useful?

Answer 22

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

Question 23

When are Jon built wooden scaffolds used?

Answer 23

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

Question 24

How high can wooden scaffolds be?

Answer 24

15m (50ft)

Question 25

What are the two types of wooden scaffolds?

Answer 25

Single pole Double pole

Question 26

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

Answer 26

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

Question 27

Where are welded steel frame scaffolds commonly used?

Answer 27

Construction sites.

Question 28

What are the two main parts to welded steel frame scaffolds

Answer 28

End frame Cross brace

Question 29

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

Answer 29

Locking coupler pins

Question 30

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

Answer 30

3M (10ft)

Question 31

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

Answer 31

6.4m (21ft)

Question 32

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

Answer 32

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

Question 33

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

Answer 33

Every 6m (20ft)

Question 34

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

Answer 34

Mud sills

Question 35

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

Answer 35

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

Question 36

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

Answer 36

3 times the minimum base dimension