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Contractors Exam > Scaffold > Flashcards

Scaffold Flashcards

1
Q

A suspension scaffold consisting of a platform essentially supported by horizontal and parallel ropes with a vertical pick-up is a?

A

Catenary scaffold.

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2
Q

When using scaffolding boards, the space between the boards cannot be more than:

A

1 inch

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3
Q

Scaffold platforms and walkways shall be at least how wide?

A

18 inches

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4
Q

The maximum distance from the face for outrigger scaffolds shall be:

A

3” inches

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5
Q

Each end of a platform must extend over the centerline of its support at least:

A

6” inches

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6
Q

A scaffolding platform longer than 10 feet shall not extend over its support more than:

A

18” inches

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7
Q

Overlapping scaffolds must overlap each other by:

A

12” inches

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8
Q

Wood platforms may not be painted so as to cover the wood finish, but they can have:

A

Wood preservatives and slip-resistant finishes applied

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9
Q

Scaffold components manufactured by different manufacturers:

A

Shall not be intermixed

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10
Q

Scaffolds must be assembled:

A

As per manufacturer’s recommendations

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11
Q

Supported scaffold poles shall bear on:

A

Base plates and mud sills

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12
Q

Defective ropes on scaffolds shall be:

A

Replaced

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13
Q

When hook-on and attachable ladders are used on a supported scaffold more than 35 feet high, they shall have rest platforms at what maximum vertical intervals?

A

35’ Feet

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14
Q

Steps accessing a scaffolding platform shall have a minimum width of:

A

16” inches

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15
Q

The minimum clearance between scaffolds and insulated power lines with less than 300 volts shall be:

A

3’ Feet

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16
Q

Employees shall be prohibited from working on scaffolds covered with snow, ice or other slippery material, except?

A

For removal of such materials

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17
Q

Scaffolding platforms shall not deflect more than how much of the span when loaded?

A

1/60

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18
Q

Each employee on a scaffold must be protected from falling when the scaffold is how far above the lower level?

A

10 Feet

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19
Q

Guardrail systems shall be installed:

A

Along all open sides and ends of platforms

20
Q

What is the MINIMUM height for guardrails on scaffolding manufactured after January 1, 2000?

A

38” inches

21
Q

With Pole scaffolds when platforms are being moved to the next level:

A

Leave the existing platform undisturbed until new bearers have been set

22
Q

All ladder jack scaffolds shall be limited to light duty and shall not exceed a height of how many feet above the floor or ground?

A

20’ Feet

23
Q

Wire ropes on catenary scaffolds shall:

A

Be continuous and not have splices between anchors

24
Q

Scaffold casters and wheels shall be:

A

Locked with positive wheel and/or wheel and swivel locks

25
Q

Who may supervise the erection and disassembling of scaffolding?

A

Only employees who are trained and qualified

26
Q

Float or ship scaffolds shall not be used to support more than how many people and a few light tools?

A

750 LB

27
Q

What is the MAXIMUM permissible span for a 2 x 10 full thickness undressed lumber plank with a working load of 25 psf?

A

10’ Feet

28
Q

Scaffold components must be able to support what without failure?

A

Its own weight and four times the maximum intended load

29
Q

Each ladder jack scaffold, top plate bracket scaffold, roof bracket and pump jack must be at least how wide?

A

12 inches

30
Q

What is the maximum horizontal distance from the front edge of a scaffold platform to the face of the work unless guardrail systems are erected along the front edge and/or personal fall arrest systems are used?

A

14 inches

31
Q

When scaffolding platform are _______ above or below point of access a ladder or stairs must be used not the cross bracing?

A

2 feet

32
Q

Each employee on a single-point or two-point adjustable suspension scaffold shall be protected by?

A

Both a personal fall arrest system and guardrail system

33
Q

When horizontal lifelines are used for fall protection on a scaffold, what are they secured to?

A

Two or more structural members

34
Q

Scaffolding crossbracing is acceptable in place of a midrail when the crossing point of two braces is between _______ and _______ above the work platform?

A

20” to 30” above the work platform

35
Q

Scaffolding crossbracing is acceptable as a toprail when the crossing point of two braces is between ______ and ______ above the work platform?

A

38” to 48” above the work platform

36
Q

A toeboard shall be erected along the edge of platforms more than 10 feet above lower levels. A toeboard must be at least _____higher than walking surface with no more than a _____ clearance above the walking surface.

A

3.5 inches in height with 1/4” maximum clearance

37
Q

Midrails, screens, mesh, intermediate vertical members, or equivalent intermediate structural members shall be installed between the top edge of the guardrail system and the walking/working surface when there is no wall or parapet wall at least?

A

21 inches high

38
Q

What is the relationship of bearers and runners when using pole scaffolds?

A

Bearers shall extend a minimum of 3 inches over the outside edge of runners

39
Q

There is a crawling board (chicken ladder) that runs from the eave to the roof peak. What is required at the end of the crawling board?

A

Ridge hook

40
Q

Catenary scaffold can have no more than how many platforms?

A

2 Platforms

41
Q

Guardrail systems shall be capable of withstanding, without failure, a force of at least ________ applied within 2 inches (5.1 cm) of the top edge, in any outward or downward direction, at any point along the top edge.

A

200 pounds

42
Q

Safety nets shall be installed as close as practicable under the walking/working surface on which employees are working, but in no case more than _________ below such level.

A

30 Feet

43
Q

Where scaffolds must be used in areas that the employer can demonstrate are so narrow that platforms and walkways cannot be at least 18 inches (46 cm) wide, such platforms and walkways shall be as wide as feasible, and employees on those platforms and walkways?

A

Shall be protected from fall hazards by the use of guardrails and/or personal fall arrest systems.

44
Q

What is the maximum scaffold working distance from the face for plastering and lathing operations?

A

18 inches

45
Q

What is the first thing you do when setting scaffolds closer than the minimum distance allowed to a power line?

A

Notify the power / utility company

46
Q

Diagonal bracing in both directions shall be installed across the entire outside face of all?

A

Double- and Single-pole scaffolds

47
Q

The maximum space between intermediate ties on scaffold with a 36” base?

A

26’

Contractors Exam (12 decks)

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