Eyebolt and Rigging Safety Quiz

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Questions and Answers

What is the main advantage of using a bolt with a hexagon head, hexagon nut, and split cotter pin?

  • It can withstand very high tensile loads.
  • It provides a quick and easy connection.
  • It is ideal for connecting multiple components together.
  • It is resistant to unintentional unscrewing. (correct)

What is the maximum angle at which load can be applied to an eyebolt with a link, relative to the axis of the screw thread?

  • 20°
  • 15° (correct)
  • 10°
  • 5°

Which type of eyebolt is specifically designed for both axial and angular loading?

  • Eyebolt with link
  • Collared eyebolt (correct)
  • Dynamo eyebolt
  • All of the above

Which type of eyebolt is most suitable for lifting loads at an angle to the axis of the screw thread?

<p>Eyebolt with link (A)</p> Signup and view all the answers

Compared to a collared eyebolt, an eyebolt with a link has a ______ axial load capacity.

<p>lower (C)</p> Signup and view all the answers

What makes the eyebolt with a link easier to fit correctly?

<p>Its ability to rotate and align with the load (C)</p> Signup and view all the answers

What is the typical range of thread sizes for an eyebolt with a link?

<p>20mm to 48mm (D)</p> Signup and view all the answers

Which of the following is NOT a type of eyebolt mentioned in the text?

<p>Swivel eyebolt (B)</p> Signup and view all the answers

What is the main difference between a rigging screw and a turnbuckle?

<p>A rigging screw has a tubular body while a turnbuckle has an open body. (B)</p> Signup and view all the answers

Why do rigging screws and turnbuckles have both right-hand and left-hand threads?

<p>To enable adjusting the length of the screw or turnbuckle by rotating it in either direction. (D)</p> Signup and view all the answers

What is the purpose of the drilled inspection hole in a rigging screw?

<p>To visually confirm that the terminal fitting has properly engaged with the screw body. (B)</p> Signup and view all the answers

Which of the following is a common alternative name for a rigging screw?

<p>Bottle screw (C)</p> Signup and view all the answers

What types of terminal fittings can be used with both rigging screws and turnbuckles?

<p>All of the above (D)</p> Signup and view all the answers

What is the primary function of a shackle in lifting operations?

<p>Connecting lifting gear and slings to a load (C)</p> Signup and view all the answers

What is the main difference between a large dee shackle and a small dee shackle?

<p>The internal clearance in the body and jaw (B)</p> Signup and view all the answers

Which of these types of lifting accessories are NOT mentioned in the text as being used with Dee shackles?

<p>Chain slings (D)</p> Signup and view all the answers

What is TRUE regarding the safe working load (SWL) of shackles?

<p>Shackles made from higher quality alloy steels have a higher SWL (A)</p> Signup and view all the answers

How have current shackle standards changed compared to the older standards?

<p>They do not specify the exact dimensions of each shackle (D)</p> Signup and view all the answers

Which of the following is NOT a type of shackle commonly used in lifting operations?

<p>Sling shackle (C)</p> Signup and view all the answers

Which of these statements is TRUE about the use of shackles?

<p>Shackles can serve as the suspension for lifting appliances. (B)</p> Signup and view all the answers

Which factor primarily determines the size of a shackle based on older standards?

<p>The diameter of the material in the shackle body (A)</p> Signup and view all the answers

What is the maximum angle of inclination allowed between the planes of the eyes of two collar eyebolts of the same capacity when used in pairs?

<p>5° (B)</p> Signup and view all the answers

What is the primary limitation of a Dynamo Eyebolt?

<p>It can only be used for axial lifting. (D)</p> Signup and view all the answers

Which type of eyebolt has a higher SWL in axial loading, but a lower capacity when subjected to angular loads?

<p>Collar Eyebolt (B)</p> Signup and view all the answers

What is the purpose of using shims with Collar Eyebolts?

<p>To ensure proper alignment of the eyebolts. (B)</p> Signup and view all the answers

What is the typical SWL range of metric threaded collar eyebolts?

<p>0.4t to 25t (B)</p> Signup and view all the answers

What is the primary reason for using shackles with Collar Eyebolts?

<p>To provide a connection point for a hook. (A)</p> Signup and view all the answers

Why are Imperial threaded collar eyebolts available in a different SWL range compared to metric threaded collar eyebolts?

<p>They are designed to replace older withdrawn standards. (C)</p> Signup and view all the answers

Which type of eyebolt is most suitable for lifting heavy loads directly vertically?

<p>Dynamo Eyebolt (B)</p> Signup and view all the answers

Which of the following is NOT a man-made fiber commonly used in textile slings?

<p>Hemp (C)</p> Signup and view all the answers

What is a key advantage of flat woven webbing slings compared to chain or rope slings?

<p>Reduced risk of damage to the load's surface (C)</p> Signup and view all the answers

What material is typically used for the protective cover of a roundsling?

<p>The same material as the core (B)</p> Signup and view all the answers

Which of the following is NOT a characteristic of HMPE (High Modulus Polyethylene) slings?

<p>Lower cost compared to traditional slings (A)</p> Signup and view all the answers

Which of the following is a factor that can influence the performance of textile slings?

<p>All of the above (D)</p> Signup and view all the answers

What is the purpose of the core in a roundsling?

<p>To distribute the load evenly (A)</p> Signup and view all the answers

Which of the following is an advantage of using textile slings compared to wire rope slings?

<p>Greater flexibility (B)</p> Signup and view all the answers

What is the primary reason why natural fiber slings are rarely used in modern lifting operations?

<p>They are not strong enough (B)</p> Signup and view all the answers

What makes man-made fibre roundslings especially suited for delicate surfaces?

<p>They are made of flexible material. (A)</p> Signup and view all the answers

Which type of sling is considered less robust compared to wire rope and chain slings?

<p>Man-made fibre roundslings (A)</p> Signup and view all the answers

What is the traditional form of textile sling that has seen a decline in recent years?

<p>Fibre rope slings (C)</p> Signup and view all the answers

What distinguishes fibre rope slings from other types of textile slings?

<p>They are less pliable and have a harder contact point with the load. (B)</p> Signup and view all the answers

How are fibre rope slings made?

<p>By hand splicing cut lengths of rope. (D)</p> Signup and view all the answers

What is recommended to protect the eyes of multi-leg fiber rope slings?

<p>Wire rope thimbles (A)</p> Signup and view all the answers

What makes the identification of different fiber types used in rope slings difficult?

<p>The fibers have similar visual appearances. (A)</p> Signup and view all the answers

Which of the following is NOT a benefit of man-made fibre roundslings?

<p>High load capacity compared to wire rope slings (D)</p> Signup and view all the answers

Flashcards

Textile Slings

Slings made from materials like nylon, polyester, and polypropylene.

High Modulus Polyethylene (HMPE)

A specialized man-made fibre with high cut and abrasion resistance.

Flat Woven Webbing Slings

Slings soft in handling, spread load, and less damaging to surfaces.

Roundsling

A sling with a load-bearing core, enclosed in a protective cover.

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Natural Fibre Slings

Slings made from fibres like manila, sisal, and hemp, rarely used today.

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Manufactured Fibre Slings

Slings created from synthetic materials like nylon and polyester.

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Load Support

The ability of a sling to evenly distribute weight to prevent damage.

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Protective Cover (Roundsling)

A non-load bearing sleeve that protects the core of the roundsling.

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Color-coded labels

Labels that provide essential information for marking slings.

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Shackle

A common lifting accessory used to connect loads to lifting appliances.

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Types of shackles

Three main types: bow, dee, and grab shackles.

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Bow shackle

A type of shackle with a rounded shape, used for general purposes.

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Dee shackle

A type of shackle shaped like a 'D', known for its strength.

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Grab shackle

A shackle designed for specific applications, typically with a design that can 'grab' a load.

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Safe Working Load (SWL)

The maximum load that a shackle can safely lift without risk of breaking.

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WLL

Working Load Limit - similar to SWL, but specifically expresses the load capacity.

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Man-made fibre roundslings

Endless textile slings, soft and pliable, ideal for delicate surfaces.

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Fibre rope slings

Traditional textile slings made from cut lengths of rope, hand spliced.

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Splicing

The process of joining two pieces of rope by intertwining strands.

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Single leg vs multi-leg slings

Single leg slings have one strap; multi-leg have multiple connections to a load.

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Thimbles

Protective fittings used in slings to prevent eye damage.

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Point contact

A hard contact made by a sling to the load, less severe than wire rope.

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Coefficient of friction in splicing

The varying resistance affecting how different ropes are spliced.

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Identification of fibres

Visual similarity among various fibres makes identification difficult.

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Rigging Screw

A tubular body with threads at each end for connecting terminal fittings

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Turnbuckle

An open body with threads that adjust tension between components

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Right-hand Thread

A thread that tightens when turned clockwise

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Left-hand Thread

A thread that tightens when turned counterclockwise

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Terminal Fittings

Components used to connect rigging devices like eyes or hooks

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Metric Collar Eyebolt

Eyebolt with metric thread sizes, used for lifting loads with specific capacities.

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Imperial Collar Eyebolt

Eyebolt with imperial thread sizes; used as older standard replacements.

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Angular Loading

Lifting load at an angle, reducing the maximum load capacity of an eyebolt.

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Dynamo Eyebolt

Basic eyebolt designed for axial (vertical) lifting with a large eye for hooks.

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Maximum Load Reduction

Decreased lifting capacity due to angular loading of eyebolts.

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Alignment of Eyebolts

Eyebolts should not incline more than 5° away from each other in pairs.

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Hexagon Bolt and Nut

A bolt with a hexagonal head and a matching nut, used for secure connections that do not unscrew unintentionally.

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Split Cotter Pin

A fastener used to secure a bolt or nut, preventing unintentional loosening.

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Types of Eyebolts

There are three main types of eyebolts: Eyebolt with link, Collared, and Dynamo.

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Eyebolt with Link

An eyebolt that allows loading at angles, with a link for articulation and connection.

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Collared Eyebolt

An eyebolt designed for both axial and angular loading with a blended eye and collar.

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Articulation in Lifting

The ability of a lifting device to rotate or pivot to align the load.

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Loading Angle Limit

For eyebolts with links, the load angle must not exceed 15° from the axis.

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Study Notes

Textile Slings

  • Fibre slings can be made from man-made fibres (e.g., polyamide, polyester, polypropylene) and some natural fibres (e.g., manila, sisal, hemp). Rarely found in modern use.
  • Specialist man-made fibres like HMPE (High Modulus Polyethylene) are used for specialized lifting slings.
  • These fibres have different reactions to temperature, chemicals, and the environment.
  • Textile slings come in various forms: flat woven webbing, round slings, fibre rope slings.

Types of Textile Slings

  • Flat woven webbing slings: Often called belt slings, they are good for handling loads where support is needed, spreading the load across the width. They are less robust than rope/chain slings.

  • Roundslings: Core enclosed in protective cover. The core is the load-bearing part made from strands of fibre. The cover protects the core. Less robust than rope/chain slings.

  • Fibre rope slings: Traditional form of textile sling, though newer forms (like flat woven webbing) are more common. Still used in some industries. Produced from cut lengths of rope and hand-spliced, may be produced by the user in some cases.

Identification

  • Visually identifying fibres can be difficult as they look similar.
  • An international colour-coded labelling system is used for marking slings.

Shackles

  • Shackles are common lifting accessories used in various applications.
  • Three main types are bow, dee, and grab shackles, made from different types of steel.
  • Older standards specified all dimensions, while current standards specify some dimensions with others as maximum/minimum values.
  • Shackles are sized by material/diameter (older) or WLL (working load limit / newer).
  • Dee Shackles: Large dee (general engineering purposes) and small dee (higher SWL for similar size, suitable for hooks, eyebolts, etc).
  • Bow Shackles: Large bow (general engineering purposes) and small bow (higher SWL for similar size, suitable for hooks, eyebolts, etc).
  • Grab Shackles: Dee shackle, designed for grabs (circular apertures).

Pins

  • Pins (screw pins and bolt, nut and cotter) are used for joining the shackles.
  • Screw pins are suitable for various uses but can loosen with movement/vibration.
  • Bolt, nut and cotter pins provide positive connection, suitable for applications where consistent connection is needed.

Eyebolts

  • Often used with lifting gear.
  • Common types: eyebolt with link, collared, dynamo.
  • Can be used at angles to the axis. Safe working capacity (SWL) rated for direction & thread size.
  • Limitations exist, correct use and potential for misuse should be considered.

Rigging Screws and Turnbuckles

  • Used for tensioning and adjustment, are often used in chains, wire rope, or textile-element-based lifting assemblies.
  • Rigging Screws: Tubular body with internal right-hand and left-hand threads at the ends.
  • Turnbuckles: Open body with threaded bosses (right/left hand threads). Drilled inspection holes. For use in specific applications.

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