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Construction safety > Official scaffold study guide > Flashcards

Official scaffold study guide Flashcards

1
Q

What is the scaffold capacity factor?

A

scaffold must support 4 times the intended load.

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2
Q

on platform scaffolds construction gaps can be….

A

1” max

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3
Q

The overlap gap for platform must construction must be …….

A

12” min a supports

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4
Q

no ___ on wooden platforms

A

paint

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5
Q

Use only ____ grade wood on Platform scaffold construction.

A

scaffold

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6
Q

Not require to be stamped scaffold grade, and it is up to the competant person to decided if the boards used are safe.

A

scaffold boards

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7
Q

If platforms/walkways cannot be 18” wide, and if the worker could fall more than 10’ _____.

A

Then the worker must be protected by guardrails and/or PFAS

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8
Q

What is the scaffold-to-workforce distance?

A

14” for most operations

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9
Q

What is the scaffold-to-workforce distance for plastering and lathing?

A

18”

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10
Q

Min. platform overhang is ___ over centerline of support unless cleated or otherwise secured from movement.

A

6”

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11
Q

If platform is 10’ long or less, max overhang is ___.

A

12”

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12
Q

If platform overhang is 10’ long or more, max overhang is ___.

A

18”

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13
Q

Platform overlaps are done to create a long platform, what are the requirements?

A
  1. must be over supports, and

2. not less than 12” unless secure to prevent movement.

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14
Q

Scaffold mixed components two requirements:

A
  1. must be compatible.

2. Competent person must check it out.

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15
Q

If a scaffold has a height to width ratio that is greater than 4:1, than____.

A

it must be guyed, tied, or braced.

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16
Q

If a scaffold is greater than 3 feet wide it must be secured every ___, after 4x the base width.

A

26’

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17
Q

If a scaffold is less than 3 ft. wide it must be secure every __ vertically, after 4x the base width.

A

20’

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18
Q

If you chose not to secure a scaffold you must either use___ or ___.

A
  1. Outriggers

2. widen the base

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19
Q

A designer is required when building scaffolds greater than ___ high, design must be done by a register __.

A

125’ high, PE

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20
Q

Access must be provided when platforms are greater than ___ above or below a point of access.

A

2 feet

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21
Q

Ladders bottom rung is __ max ht.

A

24”

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22
Q

stay __ feet away from power lines.

A

10 feet

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23
Q

Stay ___ away from insulated power lines less than 300 volts.

A

3 feet

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24
Q

stay __ away from un-insulated lines and insulated lines greater than 300 volts.

A

10 feet

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25
Q

If greater than 50 Kv, _______.

A

stay 10 feet plus .4” per every Kv over 50.

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26
Q

Platforms must not deflect more than__ of span when loaded.

A

1/60th

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27
Q

Must be on firm surface except concrete, must inspect surfaces first for holes, must lock — scaffolds prior to use.

A

casters

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28
Q

When using mobile scaffolds apply force load no more than __ above the base when moving scaffolds

A

5 feet

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29
Q

required to prevent racking or collapse.

A

Diagonal bracing

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30
Q

When using mobile scaffolds rolling surface is no more than ____ out of level.

A

3 degrees

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31
Q

When using rolling scaffolds rolling surface must be free from _____.

A

pits, holes, and obstructions

32
Q

When using outrigger frames on rolling scaffolds they must be ____.

A

used on both sides of the scaffold

33
Q

When using rolling scaffolds no employee on any part of the scaffold should extend beyond the ____.

A

wheels or casters

34
Q

When using rolling scaffolds make the employee aware of the ___.

A

move

35
Q

Fall protection is required __ when using scaffolds.

A

10 feet

36
Q

Use __ and __ on suspension scaffolds.

A

PFAS and Guardrails

37
Q

___ and ___ use PFAS where feasible.

A

Erectors and Dismantlers

38
Q

Personal fall arrest systems on scaffolds must be attached by lanyard either……..

A
  1. to a lifeline (either vertical or horizontal)

2. to a scaffold structural member

39
Q

According to what osha standard must all scaffolds unless specified by g1 (1)- g1 (vi) have guardrail systems and PFAs that meet the requirements of g4.

A

1926.451 g (1) (vii)

40
Q

A top rail on a guard rail system must be how high?

A

38-45 inches

41
Q

Guard rails and PFAs are required on all sides, except the sides where ______.

A

Work is being done

42
Q

For falling object protection what can be done?

A

Barricades, screens, nets, and toeboards

43
Q

If the toe boards are not high enough because the material is stacked too high.

A
  1. Use screening from toe board to top rail
  2. Use canopies or nets to catch falling objects
  3. Barricade area below
44
Q

___ should not be used as a crane

A

man lifts

45
Q

What are permissible types of loads on man lifts?

A

personnel, materials, and tools

46
Q

When are equipment modifications allowed on manlifts?

A

When you have written consent from the manufacturer and tabulated data from a PE or the manufacturer

47
Q

employee must stand firmly, not standing or climbing on the edge of the basket.

A

man basket

48
Q

No ____ while using lifts. For instance using planks, ladders or other devices.

A

Jerry rigging

49
Q

No __ to adjacent structures, while working from lifts.

A

tying off

50
Q

Employee on fully extended man lift. Ran over bricks and the boom flexed and sprung.

A

worker thrown from basket. 37 feet to concrete floor. Employee dead.

51
Q

The capacity of the rope must be ___ the intended load on suspension scaffolds.

A

6x

52
Q

Need the super vision of a ___ for rigging a suspension scaffold.

A

competent person

53
Q

When dealing with suspension scaffolds ___ equipment before each shift.

A

inspect

54
Q

Suspension scaffold must be tied to a ____ that is capable of supporting 4x the rated load.

A

Supported system

55
Q

When dealing with Suspension scaffolds ___ must reach completely to the ground.

A

Lifelines, cables

56
Q

Must be attached anchorage points capable of holding 5000 lb.

A

independent lifelines

57
Q

No ____ may be used on suspended scaffolds.

A

fuel powered equipment

58
Q

Three rules for counter weights.

A
  1. non-flowable material
  2. permanently marked with weight
  3. securely attached
59
Q

Causes of a scaffold collapse

A
  1. use of screens
  2. high winds
  3. poor foundation
60
Q

Use ___ on swinging loads

A

Tag lines

61
Q

Protect suspension ropes from ____.

A

heat or acid

62
Q

Which type of man lift requires PFAS. Scissor lifts or boom lifts?

A

All manlifts

63
Q

What are the three types of Scaffolds

A

a. Supported scaffolds
b. Suspended scaffolds
c. Man lifts

64
Q
  1. Scaffolding hazards are caused by falls. What are the main reasons a person falls. – can steeve eat pizza under furniture
A

a. Unsafe access
b. Planking – weak so it gives away
c. Fall protection – lack of
d. Collapse – foundation / structural instability
e. Struck by – falling tools/debris
f. Electrocution – power lines

65
Q

Competent person: Must be trained: Sandy makes snacks

A

a. Structural integrity scaffolds
b. Maintenance requirements, and
c. Subpart L, OSHA standard

66
Q

What are the competent persons responsibilities? –

A

a. Supervise
b. Train
c. Determine fall protection
d. Inspect
e. Determine of mixed components can be used

67
Q

What must scaffold training include?

A

a. Falls
b. Falling object hazards
c. Power lines
d. Scaffold use
e. Scaffold load capacities

68
Q

In scaffold construction what must be used?

A

a. Base plates
b. Mud sills must be used in soil or asphalt
c. Casters (May be use don concrete)

69
Q

User training requirements include:

A

a. Fall protection
b. Falling object protection
c. Power line hazards
d. Use of scaffolds
e. Handling materials on scaffold
f. Load capacities of scaffolds

70
Q

Retraining User requirements:

A
  1. Change in worksite
  2. Change in type of scaffold, fall protection
  3. Observed inadequacies in worker performance
71
Q

Methods of access:

A

a. Ladders
b. Ramps and walkways
c. Prefabricated access
d. Direct access

72
Q

Ladders may not be used to increase working height except when?

A

a. Ladder is placed against structure other than the scaffold.
b. Ladder legs must be on the same plank, or otherwise stabilized.
c. Scaffold is secured against the force of the ladder.
d. Planks are secured to prevent their movement.
e. Ladder legs are secured to prevent slippage.

73
Q

If employees use mobile scaffolds:

A

a. Surface must be level
b. Max height to base is 2:1
c. Outriggers used on both sides

74
Q

Employees must be trained in PFAS on scaffolds.

A

a. Anchorage
b. Lifeline
c. Lanyard
d. Body harness

75
Q

Manlifts requirements:

A

a. Train operators
b. Keep operators manual near by
c. Inspect equipment prior to use
d. Inspect area above and around
e. Set up – level firm
f. Move when platform is lowered

76
Q

Suspension scaffolds

.

A

a. Need competent person for rigging
b. Inspect Equipment before each shift
c. Support system must e tied to sound member that can hold 4x the rated load
d. Lifelines and cables to the ground. Independent lifelines and hoist cables must reach the ground.

Construction safety (24 decks)

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