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Question 1

What legislation covers working at height?

Answer 1

Work at Height Regulations 2005 (WAH 2005)

Question 2

Which document states the safe way to work on a scaffold contract?

Answer 2

Method Statement

Question 3

What is the safe working load of a Class B right-angle coupler?

Answer 3

6.1 kN

Question 4

What is the minimum recommended loading on a slung scaffold?

Answer 4

1.5 kN/m²

Question 5

What is the safety factor for a right-angle coupler?

Answer 5

1.65

Question 6

What is the Safe Working Load (SWL) of a class B sleeve?

Answer 6

5.5 kN

Question 7

What is the maximum distance a tie tube can be positioned from the node point?

Answer 7

300 mm

Question 8

What is the minimum recommended loading on a stair tower?

Answer 8

1.5 kN over 200 mm²

Question 9

What is the minimum size for a sole board?

Answer 9

220 × 450 × 35 mm

Question 10

What is the current technical guidance for tube and fitting scaffolds?

Answer 10

TG20

Question 11

A box tie can be considered to provide a pull capacity of?

Answer 11

12.2 kN

Question 12

How often should ledger bracing occur in an independent scaffold?

Answer 12

Each end and every other bay

Question 13

How often should sway bracing occur in a TG20 scaffold?

Answer 13

Every 6th bay

Question 14

What is the maximum width of a TG20 light duty fan?

Answer 14

6 boards (1350 mm)

Question 15

What are the industry guidelines for the use of safety harnesses?

Answer 15

When there is a risk of falling and collective protection is not in place

Question 16

Which document must you have when erecting a prefabricated (aluminium) mobile tower?

Answer 16

Instruction Manual

Question 17

At what height should guardrails and toe boards be introduced on a scaffold?

Answer 17

Every lift (when risk of fall)

Question 18

Who is responsible for fixing the concrete pads & wall plates on raking shores?

Answer 18

Principal Contractor

Question 19

What is the minimum height for the top guard-rail?

Answer 19

950 mm

Question 20

The distance between the toe board and guard-rail should not exceed?

Answer 20

470 mm

Question 21

What is the minimum height for a toe board?

Answer 21

150 mm

Question 22

Above what slope should an engineer be consulted to check sloping foundations?

Answer 22

5°

Question 23

What is the recommended maximum spacing of structural transoms on the top chord of a TG20 bridge?

Answer 23

1.2 m

Question 24

What is the minimum recommended loading for a pedestrian ramp?

Answer 24

4.0 kN/m²

Question 25

What is the general rule for tie positioning on basic scaffolds?

Answer 25

Every 4 m vertically and horizontally (16 m² pattern)

Question 26

What is the maximum angle for spurs on a truss-out scaffold?

Answer 26

35°

Question 27

How far should ladders project above the working platform?

Answer 27

1 m

Question 28

What is the minimum length of a sole board for double standards?

Answer 28

900 mm (450mm per standard)

Question 29

How should sole boards on roof scaffolds be positioned?

Answer 29

90° to rafters

Question 30

Minimum opening size for internal ladder access?

Answer 30

450 mm × 600 mm

Question 31

How should hanging tubes on drop scaffolds be supported?

Answer 31

Check doubles

Question 32

Who is responsible for foundations when erecting falsework scaffolds?

Answer 32

Principal Contractor

Question 33

At what rate should the tension chord of a beam be tied?

Answer 33

2.4 m

Question 34

How many supplementary couplers for a swivel?

Answer 34

2

Question 35

Minimum slope of a fan?

Answer 35

20°

Question 36

Safety factor for a cantilever scaffold?

Answer 36

3:1

Question 37

Max slope of a ramp?

Answer 37

1:4

Question 38

Where should check fittings be placed on a hanger?

Answer 38

Above the top and below the bottom connection

Question 39

What is the smallest base dimension for a tower scaffold?

Answer 39

1.2 m × 1.2 m

Question 40

Scaffold towers erected externally should not exceed their smallest base dimension by more than?

Answer 40

3 times

Question 41

First option when planning scaffold access?

Answer 41

Stairs or existing structures

Question 42

Minimum depth of beams for TG20 3-bay bridge?

Answer 42

305 mm

Question 43

Max transom spacing for standard scaffold board?

Answer 43

1.2 m

Question 44

How to secure ring-type gin wheels?

Answer 44

Check fittings either side

Question 45

Min number of working boards for 5-board scaffold?

Answer 45

3

Question 46

Safe working load of a Class B swivel coupler?

Answer 46

6.1 kN

Question 47

Percentage of ties that must be proof tested?

Answer 47

5%

Question 48

Ideal raking shore chord location?

Answer 48

500 mm above floor

Question 49

Legislation for hazardous materials?

Answer 49

COSHH

Question 50

How many working platforms on general-purpose scaffold?

Answer 50

2

Question 51

Max vertical load for a pair of girder clamps?

Answer 51

30 kN

Question 52

Max service gap without guardrail?

Answer 52

225 mm

Question 53

Max standard spacing on class 3 birdcage scaffold?

Answer 53

2.5 m

Question 54

Top fall protection method in WAH hierarchy?

Answer 54

Guardrail

Question 55

Min head clearance under pavement gantry?

Answer 55

2.44 m

Question 56

How often should scaffolds be inspected?

Answer 56

Every 7 days or after bad weather

Question 57

Ideal angle for rakers?

Answer 57

45°

Question 58

Where is the node point on scaffold?

Answer 58

Where standard and ledger meet

Question 59

Should the single guardrail stay in place?

Answer 59

Yes

Question 60

Where should plan braces be placed on beamed bridge?

Answer 60

Top third

Question 61

Who is responsible for safety on site?

Answer 61

Everyone

Question 62

Standard spacing for light duty scaffold?

Answer 62

2 m

Question 63

Standard spacing for general-purpose scaffold?

Answer 63

2 m

Question 64

Max load on general-purpose scaffold?

Answer 64

2.0 kN/m²

Question 65

Standard spacing for heavy-duty scaffold?

Answer 65

1.8 m

Question 66

Max first lift height for independent scaffold?

Answer 66

2.7 m

Question 67

Does a scaffolder need to be clipped on when installing ledgers & transoms within a single guardrail on a fully boarded lift?

Answer 67

No – unless kneeling below guardrail

Question 68

How often to check safety harness?

Answer 68

Before each use and every 6 months by competent person

Question 69

Max transom spacing for class 4 scaffold?

Answer 69

0.9 m

Question 70

Ideal angle for staircase stringers?

Answer 70

30–35°

Question 71

Clip-on required when raising boards?

Answer 71

Yes

Question 72

Scaffold towers erected internally should not exceed their smallest base dimension by more than?

Answer 72

3.5 times

Question 73

Expansion anchor ties only into?

Answer 73

Concrete

Question 74

Max extension on adjustable jacks (dead shore)?

Answer 74

300 mm

Question 75

What percentage of ties to ledger-braced standards?

Answer 75

50%

Question 76

Current standard for scaffolds with tube & fittings?

Answer 76

BS EN 12811