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Rigging > Chapter 5 > Flashcards

Chapter 5 Flashcards

Slings, Chain & Shackles

1
Q

How are Synthetic, Wire Ropes, and Chain Slings used in lieu of rope?

A

To provide an attachment point on cross arms, poles, or steel structures for rigging

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2
Q

Why are Synthetic, Wire Ropes, and Chain Slings popular amongst utility companies?

A

They are strong, durable, relatively inexpensive and are tagged with specific weight ratings, which improves safety

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3
Q

Why are slings especially attractive in the power delivery industry?

A

They are non-conductive

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4
Q

What are the most common configurations when using Synthetic, Wire rope or Chain slings?

A
  • Vertical
  • Choke
  • Basket
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5
Q

What is a choke good for?

A

About half the rating of a Vertical

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6
Q

What is a Basket good for?

A

About twice the rating of a Vertical

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7
Q

How does a Vertical Configuration work?

A
  • Normally more than one sling is involved
  • Sometimes referred to as a Bridle Type
  • One Vertical line to each Corner
  • Keeps Load level, while distributing weight between slings
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8
Q

How does a Choker Configuration work?

A
  • Allows the sling to bite down into place and minimize slip
  • More Strain = Tighter Choke
  • Most common when setting poles or stationary rigging points
  • Significantly reduces sling strength
  • Only be used when a basket configuration is not possible
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9
Q

How does a Basket Configuration work?

A
  • The Strongest Configuration
  • Distributes weight to each eye
  • Supporting poles from a boom during framing
  • Pole can be easily rotated
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10
Q

What’s another name for Synthetic Slings?

A

Web Slings

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11
Q

What is the most common material used for Synthetic Slings?

A

Nylon

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12
Q

What does the Name Tag provide?

A
  • WLL per Configuration

- Manufacturer’s code number that denotes they type, ply, duty rating, and the width

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13
Q

What happens if the name tag is missing or illegible?

A

Sling must be removed from service

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14
Q

Properties of a Type 3 (Flat Eye to Eye)

A
  • Eyes woven into each end
  • Choker, Basket or Vertical
  • Inexpensive, Very Common
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15
Q

Properties of of a Type 4 (Twisted Eye and Eye)

A
  • Eyes woven into each end
  • Eyes twister at Right Angles
  • More effective for Chokers and Baskets
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16
Q

Properties of a Type 5 (Endless)

A

Continuous Loop Slings

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17
Q

Properties of a Type 6 (Reversed Eye)

A
  • Formed using multiple widths of webbing held edge to edge stitched together through the middle
  • Wear Pads on each side
  • Eyes are turned at right angles
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18
Q

Properties of a Type 1 (Triangle Choker)

A

Different sized metal eyes to be used in as a choker

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19
Q

Properties of a Type 2 (Triangle to Triangle)

A
  • Same size triangular metal eyes in each end

- Used only in Basket or Vertical

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20
Q

What should you be looking for when inspecting synthetic slings?

A
  • Loose Stitching
  • Torn Fibers
  • Abrasions
  • Other Defects
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21
Q

What’re you checking for when reading the name tag on a Synthetic Sling?

A

Make sure it is adequately rated for your application

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22
Q

What shouldn’t you expose synthetic slings to?

A

Heat

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23
Q

What must you do before installing slings around sharp edges and corners?

A

Sharp edges and corners must be padded before installing slings

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24
Q

What’s one more aspect that can be damaging to Synthetic Slings?

A
  • Ultraviolet Light

- When stored, slings should be in a dry environment out of the sun

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25
Q

Common properties for wire rope slings?

A

Used for lifting very heavy loads

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26
Q

What are some examples Wire Rope Slings could be used for?

A
  • Large poles or towers
  • Large Voltage Regulators
  • Large pad-mounted transformers
  • Most Substation Equipment
27
Q

What is the most popular choice wire rope sling in the power delivery industry?

A

Strand-Laid Single Leg, Eye-To-Eye Wire Rope Sling

28
Q

Why is the Strand-Laid popular?

A

Durability in addition to strength

29
Q

What are some properties of the Strand-Laid Wire Rope Sling?

A
  • Larger Strands of steel make it less flexible but more resistant to fatigue
  • Same size slings with smaller strands are more flexible but less resistant to fatigue
30
Q

What is IWRC?

A

Independent Wire Rope Core

31
Q

What are you looking for when inspecting a Wire Rope Sling?

A
  • Broken Strands
  • Excessive Deformation
  • Reduction in Diameter
  • Rust
  • Integrity of End Fittings
32
Q

What should you check before using any sling?

A

Check the name tag to ensure sling is adequately rated for the application

33
Q

What should you do when applying slings to sharp edges and corners?

A

Protect with blocks or pads

34
Q

When not in use what should you do with slings?

A

They should be kept clean, lightly oiled, and stored in a dry environment.

35
Q

What are the common uses of Chain Slings?

A
  • Securing Loads
  • Provide Rigging Attachment Points
  • Lifting and Moving Poles and Other Equipment
36
Q

Chains of the the same diameter have different______?

A

Load Ratings

37
Q

What must chains used to secure loads that are transported on public highways have?

A

Proof-Test Rating

38
Q

What do Proof-Test Chains have?

A

Stamp on each chain link

39
Q

Chains used for lifting, rigging, or hoisting must be a minimum of what?

A

Grade 80 Alloy Chain

40
Q

What is the Association for chain ratings called?

A

National Association of Chain Manufacturers

41
Q

What are the two Chain Slings normally designated for setting poles?

A

CO or CP

42
Q

What is a CO Sling?

A

“C” is for Choker

“O” is for Oblong

43
Q

What is a CP Sling?

A

“C” is for Choker

“P” is for Pear

44
Q

What is the OSHA Standard for chain stretch?

A

1910.184

45
Q

What is the most common types of wear associated with chains?

A
  • Stretching

- Wear at the end of each link where they connect

46
Q

What happens when you drag a chain?

A

It reduces the diameter of the links

47
Q

What are you looking for when inspecting chains?

A

Corrosion, cracks, link stretch, deformation and elongation

48
Q

How should chains be stored?

A

Off the ground, to prevent rust and corrosion

49
Q

What are the two common types of shackles?

A

Material Shackles and Rigging Shackles

50
Q

What’s another name for a Material Shackle?

A

Hardware Shackle

51
Q

What’s another name for a Rigging Shackle?

A

Working Shackle

52
Q

What are Material Shackles used for?

A

Attaching or joining hardware to a structure

53
Q

What is the key identification for a Material Shackle?

A

The pin for these shackles uses a cotter key to secure it in place.

54
Q

What are Rigging Shackles used for?

A
  • Join slings
  • Provide effective means of choking slings
  • Provide Attachments Points for Rigging Purposes
55
Q

What is the key identification for a Rigging Shackle?

A
  • They have a screw type pin

- End of bolt should be flush with shackle

56
Q

How do you handle a load using a shackle?

A

Pin end to the Center of the Shackle Body

57
Q

When should a shackle be removed from service?

A

Shackles that have bent of damaged pins

58
Q

How do you rig a shackle when using it in a choker configuration?

A

Always rig the eye end of the sling to the shackle pin and the running end through the shackle body

59
Q

What does FMCSA stand for?

A

Federal Motor Carrier Safety Administration

60
Q

How is FMCSA utilized?

A

-Lists specific requirements for chains that are used for tie-downs or securing cargo

61
Q

What is FMCSA’s Regulation on WLL’s for tie-downs?

A

Subpart 393.108

62
Q

What does Rule (D) state?

A

That welded steel chain which is not marked or labeled to enable identification of its grade or WLL shall be considered to have a WLL equal to that for grade 30 proof coil chain.

63
Q

What does the FMCSA require?

A

That chains conform to the National Association of Chain Manufacturers’ Welded Steel Chain Specifications, dated September 28, 2005.

Rigging (8 decks)

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