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Hooks

A centralized library of technical standards for the safe selection and maintenance of rigging hooks. This resource provides verified data on design factors, throat opening limits, and identification requirements to ensure compliance with Alberta OH&S and ASME B30.10 standards. Beyond technical specs, we address common industry misconceptions to clarify complex regulations.

Key Focus Areas:

  • Identification: Standards for manufacturer and rated load markings.
  • Inspections: Criteria for initial, frequent, and periodic assessments.
  • Safety Limits: Guidelines for latches, temperature, and environment.
  • Removal Criteria: Indicators for wear, stretch, and unauthorized welds.

The following information is compliant with ASME B30.10 Hooks.
For more detailed information, please refer to the full ASME standard.

TRAINING

Users of alloy steel chain slings must receive training in selection, inspection, cautions to personnel , effects of environment, and correct rigging practices.

LATCHES

When present, a latch must be engineered to secure items such as slings and rigging hardware only under slack rigging conditions. It is not designed to bear or support the load.

DESIGN FACTOR

The hook must be engineered to endure all stresses encountered during normal operating conditions when handling loads within its rated capacity. At a minimum, the hook’s design factor must comply with the specifications established for the equipment or system in which it is used.

RATED LOADS

The rated load of a hook shall comply with the specifications established for the equipment or system in which it is used, or as advised by a qualified person

HOOK IDENTIFICATION

The hook must bear either the hook manufacturer’s or the equipment manufacturer’s identification, along with rated load identification. These markings must be forged, cast, or die-stamped onto a low-stress, nonwearing area of the hook. While the actual rated load value does not need to be displayed, the rated load identification must remain legible and intact.

TEMPERATURE

If hooks are to be used at temperatures exceeding 400°F (204°C) or below -40°F (-40°C), consultation with the hook manufacturer or a qualified person is required to ensure suitability for the application.

EFFECTS OF ENVIRONMENT

Hook strength may be compromised when exposed to chemically active environments, including caustic or acidic substances or fumes. Prior to use in such conditions, consultation with the hook manufacturer or a qualified person is recommended to ensure suitability and safety.

Inspections must be conducted by a designated individual. If any deficiencies are found, they shall be evaluated by a qualified person to determine whether they pose a hazard. The inspection procedures and recordkeeping requirements for hooks in regular service shall be determined by the type of equipment in which the hooks are used. If applicable standards for that equipment specify more rigorous requirements for hook inspections, those standards shall take precedence over the guidelines outlined below. In the absence of more stringent equipment-specific standards, hook inspections shall include an initial examination followed by two general classifications based on inspection intervals.

These classifications are defined as:
• Initial inspection
• Frequent inspection
• Periodic inspection

Initial Inspection

Before being placed into service, all new, altered, modified, or repaired hooks shall undergo inspection to confirm compliance with the relevant requirements of this Volume. Documentation of these inspections is not mandatory.

Frequent Inspection

(a) Frequent inspections must involve visual observations made during regular operations. These inspections must include checks for any conditions listed under hook removal criteria.
(b) For hooks installed in semi-permanent or inaccessible locations where frequent inspections are impractical, periodic inspections must be conducted instead. The frequency of these inspections must be determined by a qualified person.
(c) The frequency of inspections should be based on the following factors:

  1. How often the hook is used
  2. The severity of the service environment
  3. The nature of the lifts being made
  4. Experience with the service life of similar hooks under comparable conditions
  5. Recommended inspection intervals:
    • Normal service: Monthly
    • Heavy service: Weekly to monthly
    • Severe service: Daily to weekly

Periodic Inspections

(a) A thorough inspection of the hook must be conducted. Disassembly may be necessary to allow for a complete evaluation. The hook shall be examined for any conditions outlined in removal criteria.
(b) Inspection Frequency
Periodic inspections must be performed at intervals not exceeding one year, unless a qualified person approves an alternative schedule. The inspection frequency should be determined based on the following factors:

  1. Frequency of hook usage
  2. Severity of service conditions
  3. Type of lifts being made
  4. Historical performance and service life of similar hooks
  5. Recommended inspection intervals:
    • Normal service: Annually, with equipment remaining in place
    • Heavy service: Semiannually, with equipment in place unless external conditions warrant disassembly for detailed inspection monthly or quarterly
    • Severe service: Quarterly, following the same approach as heavy service. Detailed inspection may indicate the need for nondestructive testing.

(c) Hooks must not be returned to service until they have been approved by a qualified person.
(d) Written documentation of periodic inspections is required.

Removal Criteria

Hooks must be removed from service if any of the following conditions are observed and must only be returned to sevice after approval by a qualified person:

   (a) Manufacturer’s identification or secondary identification is missing or illegible
   (b) Rated load marking is missing or illegible
   (c) Excessive pitting or corrosion
   (d) Presence of cracks, nicks, or gouges
   (e) Wear exceeding 10% of the original section dimension of the hook or load pin, or as specified by the manufacturer
   (f) Visible bending or twisting from the plane of the original hook shape
   (g) Throat opening increased by more than 5%, not to exceed ¼ in. (6 mm), or as specified by the manufacturer
   (h) Self-locking hook fails to lock
   (i) Latch (if required) is damaged or fails to close the hook’s throat
   (j) Hook attachment or securing components are damaged, missing, or malfunctioning
   (k) Threads show signs of wear, damage, or corrosion
   (l) Evidence of excessive heat exposure or unauthorized welding
   (m) Unauthorized modifications such as drilling, machining, grinding, or other alterations

Repairs and Modifications

Any conditions identified during inspection shall be corrected through repair or replacement prior to returning the hook to service. All repairs and modifications must be approved by the hook manufacturer or a qualified person.

Operating Practices for Single-Point Hooks

Personnel operating lifting equipment with single-point hooks must observe the following safety and operational practices:

  • (a) Confirm that the load weight does not exceed the lower of the hook’s rated capacity or the equipment’s rated capacity.
  • (b) Avoid shock loading under all circumstances.
  • (c) Ensure the load is centred in the hook’s bowl or saddle to prevent point loading.
  • (d) When using multi-leg slings in the hook bowl, the included angle between sling legs must not exceed 90°, or as specified by the hook manufacturer. The angle between any sling leg and the hook’s centerline must not exceed 45°.
  • (e) Use a collector ring (e.g., link or shackle) when placing more than two sling legs in a hook or when sling angles exceed 45°.
  • (f) Do not apply side, back, or tip loads to the hook.
  • (g) If a device is used to close the hook’s throat, ensure it does not bear the load.
  • (h) Keep hands, fingers, and body parts clear of the area between the hook and the load.
  • (i) A latch on the hook does not guarantee retention of a slack sling or load. Latches are intended only to retain loose rigging under slack conditions and are not antifouling devices. Always visually verify proper engagement.
  • (j) Self-locking hooks must be locked during use.
  • (k) If a latch includes a lock-open feature for rigging, it must be closed during lifting operations.
  • (l) The load must not obstruct the latch from closing properly.
  • (m) The requirement for a latch or mousing depends on the specific application and must be determined by a qualified person.

Operating Practices for Duplex and Quad Hooks

Personnel using duplex or quad hooks shall observe the following practices:

  • (a) To determine allowable sling angles for duplex (sister) and quad hooks, consult the hook manufacturer or a qualified person.
  • (b) Duplex (sister) hooks must be evenly loaded on both sides unless specifically designed for single-point loading. When using articulated duplex hooks, exercise caution, as articulation may introduce instability in the suspended load.
  • (c) If a duplex hook is loaded at the pinhole rather than the saddles, the applied load must not exceed the rated capacity normally distributed across both saddles or the rated capacity of the supporting equipment—whichever is lower.
  • (d) Quad hooks must be used with all prongs loaded and rigged to balance forces evenly. For two-prong or unbalanced loading, consult the manufacturer or a qualified person.
  • (e) Hooks must not be subjected to side, back, or tip loading.
  • (f) If a device is used to close the hook’s throat, ensure it does not carry any portion of the load.
  • (g) Keep hands, fingers, and body parts clear of the area between the hook and the load.
  • (h) A hook latch does not guarantee retention of a slack sling or load. Latches are intended only to retain loose rigging under slack conditions and are not antifouling devices. Always perform a visual check to confirm proper hook engagement.
  • (i) If a latch includes a lock-open feature for rigging, it must be closed during lifting operations.
  • (j) The load must not obstruct the latch from closing fully.
  • (k) The requirement for a latch or mousing depends on the specific application and must be determined by a qualified person

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Training is only one factor in being competent to carry out rigging tasks without supervision. You must also be qualified and have sufficient experience to work safely on your own.

Referenced Standards:

ALBERTA OHS ACT
1(d) “competent” in relation to a person, means adequately qualified, suitably trained and with sufficient experience to safely perform work without supervision or with only a minimal degree of supervision
(3)(a) If work is to be done that may endanger a worker, the employer must ensure that the work is done by a worker who is competent to do the work.

TRAINING
Workers using and maintaining hooks must be properly trained in the selection, inspection and usage. Including potential impacts on the work environment and other workers.

For more detailed information, refer to the ASME Standard B30.10-2024 Chapter 10-1 Hooks.

Loads must be centred on the base (bowl/saddle) of the hook to prevent point loading of the hook. Hooks are not designed to place a side load, back load, or tip load on the hook.

Referenced Standards:

SINGLE-POINT HOOK OPERATING PRACTICES

  • Load Limits:
    Ensure load does not exceed the lesser of the hook’s rating or the equipment’s rating.
  • Shock Loading:
    Avoid shock loading at all times.
  • Load Positioning:
    Centre the load in the hook’s bowl/saddle to prevent point loading.

Refer to the ASME Standard B30.10-2024 Chapter 10-1 Hooks for more detailed information.

Hook latches aid the retention of lose slings under slack rigging conditions only. They are not intended to be used as anti-fouling devices during lifting or rigging. Visual verification of proper hook engagement is required in all cases.

Referenced Standards:

Hook Latches:
Latches help retain loose slings under slack conditions but do not prevent detachment during lifting. Always visually verify proper engagement. Self-locking hooks must be locked during use. If latch has a lock-open feature, close it during operation. Load must not restrict latch closure.

Refer to the ASME Standard B30.10-2024 Chapter 10-1 Hooks for more detailed information.

When more than two legs are placed in a hook or when angles are greater than 45 degrees with respect to the hook centreline, a collector ring, such as a shackle or link, should be used.

Referenced Standards:

SINGLE-POINT HOOK OPERATING PRACTICES

  • Load Limits:
    Ensure load does not exceed the lesser of the hook’s rating or the equipment’s rating.
    Max included angle between slings in the hook = 90° (or per manufacturer). Max sling leg angle to hook centerline = 45°. Use a collector ring (link/shackle) for more than two legs or angles >45°.
  • Safety Around Hooks:
    Keep hands, fingers, and body clear of hook and load.
  • Hook Latches:
    Latches help retain loose slings under slack conditions but do not prevent detachment during lifting. Always visually verify proper engagement. Self-locking hooks must be locked during use. If latch has a lock-open feature, close it during operation. Load must not restrict latch closure.
  • Latch or Mousing Requirement:
    Determined by application and a qualified person.

Refer to the ASME Standard B30.10-2024 Chapter 10-1 Hooks for more detailed information.

Training is only one factor in being competent to carry out rigging tasks without supervision. You must also be qualified and have sufficient experience to work safely on your own.

Referenced Standards:

ALBERTA OHS ACT
1(d) “competent” in relation to a person, means adequately qualified, suitably trained and with sufficient experience to safely perform work without supervision or with only a minimal degree of supervision
(3)(a) If work is to be done that may endanger a worker, the employer must ensure that the work is done by a worker who is competent to do the work.

TRAINING
Workers using and maintaining hooks must be properly trained in the selection, inspection and usage. Including potential impacts on the work environment and other workers.

For more detailed information, refer to the ASME Standard B30.10-2024 Chapter 10-2 Hooks Miscellaneous.

Loads must be centred on the base (bowl/saddle) of the hook to prevent point loading of the hook. Hooks are not designed to place a side load, back load, or tip load on the hook.

Referenced Standards:

SINGLE-POINT HOOK OPERATING PRACTICES

  • Load Limits:
    Ensure load does not exceed the lesser of the hook’s rating or the equipment’s rating.
  • Shock Loading:
    Avoid shock loading at all times.
  • Load Positioning:
    Centre the load in the hook’s bowl/saddle to prevent point loading.

Refer to the ASME Standard B30.10-2024 Chapter 10-1 Hooks for more detailed information.

Hook latches aid the retention of lose slings under slack rigging conditions only. They are not intended to be used as anti-fouling devices during lifting or rigging. Visual verification of proper hook engagement is required in all cases.

Referenced Standards:

  • Hook Latches:
    Latches help retain loose slings under slack conditions but do not prevent detachment during lifting. Always visually verify proper engagement. Self-locking hooks must be locked during use. If latch has a lock-open feature, close it during operation. Load must not restrict latch closure.

Refer to the ASME Standard B30.10-2024 Chapter 10-1 Hooks for more detailed information.

When more than two legs are placed in a hook or when angles are greater than 45 degrees with respect to the hook centreline, a collector ring, such as a shackle or link, should be used.

Referenced Standards:

SINGLE-POINT HOOK OPERATING PRACTICES

  • Load Limits:
    Ensure load does not exceed the lesser of the hook’s rating or the equipment’s rating.
    Max included angle between slings in the hook = 90° (or per manufacturer). Max sling leg angle to hook centerline = 45°. Use a collector ring (link/shackle) for more than two legs or angles >45°.
  • Safety Around Hooks:
    Keep hands, fingers, and body clear of hook and load.
  • Hook Latches:
    Latches help retain loose slings under slack conditions but do not prevent detachment during lifting. Always visually verify proper engagement. Self-locking hooks must be locked during use. If latch has a lock-open feature, close it during operation. Load must not restrict latch closure.
  • Latch or Mousing Requirement:
    Determined by application and a qualified person.

Refer to the ASME Standard B30.10-2024 Chapter 10-1 Hooks for more detailed information.

The normal recommended angle of loading when using sorting hooks is 30 to 45 degrees. These lower angles although typically discouraged for most rigging applications, allows the load to more easily obtain full hook throat engagement. Manufacturer guidelines must always be referenced.

Sorting hooks are commonly used for lifting plate when part of a 4-legged bridle. Do not exceed 45 degrees between two hooks on the same side of the load.

Suppliers and Employers are equally responsible for ensuring the products supplied to and used at the job site are compliant with industry and legislative standards.

Click on the appropriate questionnaire below when acquiring information from the supplier or manufacturer for each of the specified products.

Refer to Alberta OHS Act – Obligations of Worksite Parties and the applicable ASME B30.9 Standards.

Hooks

References

References

Q: All types of inspections must be carried out by a trained and designated person.

True. A person must be trained and designated to carry out inspections on Links and Rings. Refer to ASME B30.26 – Chapter 4.8 Links, Master Links, Subassemblies, Rings and Swivels for general information on the inspection criteria of Links and Rings.False. The horizontal load angle on a Link or Ring should ideally be 60 degrees or greater. Refer to the ASME B30.26 – Chapter 4.9 Links, Master Links, Subassemblies, Rings and Swivels for rigging and operating practices of Links and Rings for more information.

References

Q: The horizontal load angle should not be less than 45 degrees. 

False. The horizontal load angle on a Link or Ring should ideally be 60 degrees or greater. Refer to the ASME B30.26 – Chapter 4.9 Links, Master Links, Subassemblies, Rings and Swivels for rigging and operating practices of Links and Rings for more information.

References

Q: When multiple slings are gathered on a Link or Ring, the included angle must not exceed 120 degrees.

True. The included angle for multiple slings gathered on a Link or Ring must not exceed 120 degrees. Exceeding the 120-degree limit significantly increases the tension on the sling legs and the load on the connection point, overall reducing the lifting capacity. Refer to the ASME Standard B30.26 – Chapter 4.9 Links, Master Links, Subassemblies, Rings and Swivels for detailed information on the rigging practices for Links and Rings. 

References

Q: Periodic inspections of Links and Rings must be carried out monthly.

False. A periodic inspection must be conducted on rigging hardware at minimum once a year. The ASME Standard B30.26 – Chapter 4.8 Links, Master Links, Subassemblies, Rings and Swivels should be referred to for more detailed information on periodic inspection practices for Links and Rings.

References

Q: Links and Rings must always be marked with their size or rated load.

True. Rigging hardware such as Links and Rings must be durably marked with their size or rated load (WLL) by the manufacturer.  For more detailed information, refer to ASME B30.26 – chapter 4.5 Links, Master Links, Subassemblies, Rings and Swivels for specific identification requirements.

References

Q: One cubic foot of solid steel weighs 419 lbs.

False. Steel has a density of  0.284 lbs. per cubic inch, or 490 lbs. per cubic foot.

References

Q: The minimum design factor for Links and Rings is 4:1.

False. The minimum design factor for Links and Rings is generally 5:1. The ASME Standard B30.26 – Chapter 4.2 Links, Master Links, Subassemblies, Rings and Swivels should be referred to for more detailed information on design factors.

References

Q: All Links and Rings must be visually inspected before each use.

True. Links and Rings must be frequently examined visually by a trained and designated person each shift before each use to determine if its condition is fit for service.  Refer to the ASME Standard B30.26 Chapter 4.8 Links, Master Links, Subassemblies, Rings and Swivels for more details on frequent inspection requirements.

References

Q: The rated load/ WLL (Working Load Limit) of a Link or Ring must not be exceeded.

True. The WLL of a Link or Ring must not be exceeded for any reason. Refer to the ASME Standard B30.26 – Chapter 4.1 Links, Master Links, Subassemblies, Rings and Swivels for more detailed information on Link and Ring operating and selection practices.

References

Q: The applicable industry standard to reference for details about Links and Rings is ASME B30.26.

True. Refer to the ASME B30.26-4 Links, Master Links, Subassemblies, Rings and Swivels standard for all applicable information and requirements related to Links and Rings.

Referenced

Q: Periodic inspections of Swivel Hoist Rings must be carried out monthly.

False. A periodic inspection must be conducted on a Swivel Hoist Ring at minimum once a year. Refer to the ASME Standard B30.26 – Chapter 2.8 Adjustable Hardware for more detailed information on periodic inspection practices for Swivel Hoist Rings.

Referenced

Q: Swivel Hoist Rings must always be marked with their Working Load Limit (WLL).

True. All Swivel Hoist Rings must be legibly marked with the Manufacturer’s name or trademark, its Rated Load (WLL), and the Torque value. If the markings are missing or illegible, the device must be removed from service immediately. Refer to the ASME Standard B30.26 – Chapter 2.5 Adjustable Hardware for more information on Swivel Hoist Ring identification.

Referenced

Q: One cubic foot of solid steel weighs 490 lbs.

True. Steel has a density of  0.284 lbs. per cubic inch, or 490 lbs. per cubic foot.

Referenced

Q: The bolt of a Swivel Hoist Ring contains long threads that can be cut to the required length.

False. The bolt of a Swivel Hoist Ring must never be cut or machined. Modifications are prohibited as it significantly impacts the device’s structural integrity. For more details see the ASME B30.26 – Chapter 2.8 Adjustable Hardware for inspection, repair and removal criteria of a Swivel Hoist Ring.

Referenced

Q: Swivel Hoist Rings are designed to rotate under loaded conditions.

True. Swivel Hoist rings are designed to rotate under loaded conditions.  Refer to the ASME Standard B30.26 – Chapter 2.9 Adjustable Hardware for detailed information on the rigging and operating practices of a Swivel Hoist Ring. 

Referenced

Q: The minimum design factor for Swivel Hoist Rings is 6:1.

False. Swivel Hoist Rings must have a minimum design factor of 5:1, which means the breaking strength must be at least five times the rated WLL. For more detailed information, refer to ASME B30.26 – chapter 2.2 Adjustable Hardware for design factor of a Swivel Hoist Ring.

Referenced

Q: Spacers can be used between the Swivel Hoist ring and the load being lifted.

False. Spacers or washers must not be used between the flange of a swivel hoist ring and the surface of a load. This is to ensure proper distribution and stability. Refer to the ASME Standard B30.26 – Chapter 2.9 Adjustable Hardware for more detailed information on rigging and operating practices for Swivel Hoist Rings. 

Referenced

Q: Swivel Hoist Rings must be visually inspected before each use.

True. Swivel Hoist Rings must be visually inspected by a trained and designated person each shift before each use to determine if its condition is fit for service.  Refer to the ASME Standard B30.26 Chapter 2.8 Adjustable Hardware for more details on frequent inspection requirements for Swivel Hoist Rings.

Referenced

Q: The rated load/ WLL (Working Load Limit) of an Eyebolt must not be exceeded.

True. The WLL of a Swivel Hoist Ring must not be exceeded for any reason. Refer to the ASME Standard B30.26 Adjustable Hardware for more detailed information on Swivel Hoist Ring operating and selection practices.

Referenced

Q: The applicable industry standard to reference for details about Swivel Hoist Rings is ASME B30.26.

True. Refer to the ASME B30.26-2 Adjustable Hardware standard for all applicable information and requirements related to Swivel Hoist Rings. 

Referenced

Q: Periodic inspections of Eyebolts must be carried out at least every month.

False. A periodic inspection must be conducted on a Eyebolts at minimum once a year. Refer to the ASME Standard B30.26 – Chapter 2.8 Adjustable Hardware for more detailed information on periodic inspection practices for Eyebolts.

Referenced

Q: One cubic foot of solid steel weighs 490 lbs.

True. Steel has a density of  0.284 lbs. per cubic inch, or 490 lbs. per cubic foot.

Referenced

Q: Eyebolts are not always marked with their WLL (Working Load Limit). 

True. Each Eyebolt must be marked with Manufacturer’s Name or Trademark, Size or Rated Load and Grade for alloy steel eyebolts. For more details see the ASME B30.26 – Chapter 2.8 Adjustable Hardware for inspection, repair and removal criteria of Eyebolts.

Referenced

Q: Shouldered Eyebolts are for in-line loading only.

False. When Shoulder Eyebolts are used for angular loading the shoulder must be flush with and securely tightened against the load. The working load limit (WLL) must be reduced in accordance with the manufacturer’s specifications.  Refer to the ASME Standard B30.26 – Chapter 2.9 Adjustable Hardware for detailed information on the rigging and operating practices of Eyebolts.

Referenced

Q: The minimum design factor for Eyebolts is 3:1.

False. Eyebolts must have a minimum design factor of 5:1, which means the breaking strength must be at least five times the rated WLL. For more detailed information, refer to ASME B30.26 – chapter 2.2 Adjustable Hardware for design factor of Eyebolts.

Referenced

Q: When an Eyebolt is used at an angle its capacity increases.

False. The angle of loading directly influences the stress on the eyebolt; as the angle becomes more horizontal, the stress increases.

Refer to the ASME Standard B30.26 – Chapter 2.9 Adjustable Hardware for more detailed information on rigging and operating practices for Eyebolts.

Referenced

Q: Eyebolts must be visually inspected before each use.

True. Eyebolts must be visually inspected by a trained and designated person each shift before each use to determine if its condition is fit for service.  Refer to the ASME Standard B30.26 Chapter 2.8 Adjustable Hardware for more details on frequent inspection requirements for Eyebolts.

Referenced

Q: The rated load/ WLL (Working Load Limit) of an Eyebolt must not be exceeded.

True. The WLL of an Eyebolt must not be exceeded for any reason. Refer to the ASME Standard B30.26 Adjustable Hardware for more detailed information on Eyebolt operating and selection practices.

Referenced

Q: The applicable industry standard to reference for details about Eyebolts is ASME B30.26.

True. Refer to the ASME B30.26-2 Adjustable Hardware standard for all applicable information and requirements related to Eyebolts.

Referenced

Q: Bolt-type shackles are to be used in long-term installations.

True. Bolt-type shackles are the preferred choice for long-term or semi-permanent installations as the nut and cotter pin act as a secondary retention system that prevents the pin from rotating or unscrewing. Refer to the ASME Standard B30. Shackles for more detailed information on rigging and operating practices involving shackles.

Referenced

Q: Both the body and the pin of the Shackle must be marked with the manufacturer’s identification.

True. The Shackle body and pin is required to be marked with the manufacturer’s identification.  The shackle pin must be from the same manufacturer as the shackle body.  Refer to the ASME Standard B30.26 Shackles for more information on shackle body identification and shackle pin identification.

Referenced

Q: One cubic foot of solid steel weighs 490 lbs.

True. Steel has a density of  0.284 lbs. per cubic inch, or 490 lbs. per cubic foot.

Referenced

Q: A round pin Shackle is the best Shackle to use for angled (side-loaded) lifts. 

False. A round pin Shackle is in fact the worst choice for an angled (side-loaded) lift. Refer to the manufacturer’s specifications for material specifications for side-loading. For more details on shackle types, see the ASME B30.26 Shackles standard.

Referenced

Q: All Shackles have a design factor of 5:1 

False. Shackles up to and including 150 Ton (136 metric ton) have a minimum design factor of 5:1. Shackles over 150 Ton (136 metric ton) have a minimum design factor of 4:1. Refer to the ASME Standard B30.26 – Chapter 1.2 Shackles for more detailed information on design factor allowances.

Referenced

Q: The maximum symmetrical loading between slings on a shackle is 120 degrees.

True. Slings must not exceed a 120-degree included angle when they are symmetrically loaded on the bow of a shackle.

For more detailed information, refer to ASME B30.26 – chapter 1.9 Shackles for operating and rigging practices for Shackles. 

Referenced

Q: When a shackle is ‘side-loaded’ its capacity increases.

False. The opposite is true; when a shackle is ‘side-loaded’ its capacity decreases significantly. Refer to the ASME Standard B30.26 – Chapter 1.9 Shackles for more detailed information on capacity reduction allowances and other rigging practices.

Referenced

Q: Shackles must be visually inspected before each use.

True. Shackles must be visually inspected by a trained and designated person each shift before each use to determine if its condition is fit for service.  Refer to the ASME Standard B30.26 Chapter 1.8 Shackles for more details on frequent inspection requirements.

Referenced

Q: The rated load/ WLL (Working Load Limit) of a Shackle must not be exceeded.

True. The WLL of a Shackle must not be exceeded for any reason. Refer to the ASME Standard B30.26 Shackles for more detailed information on Shackle operating and selection practices.

Referenced

Q: The applicable industry standard to reference for details about shackles is ASME B30.10.

False. Refer to the ASME B30.26-1 Shackles standard for all applicable information and requirements related to Shackles. 

Referenced

Q: The internal fibres (core yarns) of a Polyester Roundsling may be repaired with knots if they were to become cut.

False. Knots are prohibited in any part of the sling. If a Polyester Roundsling were to become damaged or the core yarns cut, the sling must be immediately removed from service. Refer to the ASME Standard B30.9 – Chapter 6.9 Polyester Roundslings for more detailed information on inspection, removal and repair criteria for Polyester Roundslings. 

Referenced

Q: The rated load capacity of a Polyester Roundsling may be reduced if used around small diameters.

True. When used around a small diameter or edge radius, the sling is forced into a sharp bend which increases tension and stress on the internal fibres. This is called “point loading” and may cause the sling to fail. Refer to the ASME Standard B30.9 chapter 6.10 Polyester Roundslings for more information on operating practices and sling selection.  

Referenced

Q: It is acceptable to use a Polyester Roundsling that has holes in its cover as long as the holes are small.

False. A Polyester Roundsling must be removed from service if there are holes, tears or cuts in the cover that expose the internal fibres. Regardless of the size of the holes, the sling becomes vulnerable and can be easily damaged. Refer to the ASME Standard B30.9 – Chapter 6.9 Polyester Roundslings for more detailed information on inspection and removal criteria for Polyester Roundslings. 

Referenced

Q: One cubic foot of solid steel weighs 490 lbs.

True. Steel has a density of  0.284 lbs. per cubic inch, or 490 lbs. per cubic foot.

Referenced

Q: Folding, bunching, or pinching of a Polyester Roundsling is acceptable.

False. It is not acceptable for a Polyester Roundsling to be folded, bunched or pinched. These conditions cause uneven loading across the width of the sling which would significantly reduce the slings rated capacity. Refer to the ASME Standard B30.9 – Chapter 10.4 Rigging Practices for Polyester Roundslings for more detailed information.

Referenced

Q: A Polyester Roundsling can be shortened by tying knots in it.

False. A Polyester Roundsling must never be used if it is knotted or twisted as it can damage the sling and significantly reduce its rated capacity. Refer to the ASME Standard B30.9 – Chapter 6.10 Polyester Roundslings for more detailed information on appropriate operating and rigging practices. 

Referenced

Q: When a Polyester Roundsling is used in a choker hitch, its capacity is based on an angle of choke that is less than 90 degrees.

False. The sling’s capacity is based on an angle of choke that is 120 degrees or greater. Refer to the ASME Standard B30.9 – Chapter 6.10 Polyester Roundslings for more detailed information on appropriate operating practices and sling selection.

Referenced

Q: Polyester Roundslings must be visually inspected every time they are used.

True. Per the Alberta OHS Code Section 294, any rigging that is to be used during a work shift must be thoroughly inspected prior to each period of continuous use by a competent person to ensure it is functional and safe. 

Referenced

Q: The rated load/ WLL (Working Load Limit) of a Polyester Roundsling must not be exceeded. 

True. The WLL of a sling must not be exceeded. Refer to the ASME Standard B30.9 – Chapter 6.10 Polyester Roundslings for more detailed information on the WLL of a Polyester Roundsling.

Referenced

Q: The applicable legislation and standards to reference for details about Polyester Roundslings is Alberta OHS Code 297 and ASME B30.9.

True. The correct Alberta legislation to reference for information on Polyester Roundslings is the Alberta OHS Code section 297. For detailed information on Polyester Roundslings, refer to the ASME B30.9 Slings standard.

Referenced

Q: Synthetic Webbing Slings can be used as bridles on suspended personnel platforms.

False. It is explicitly prohibited to use a Synthetic Webbing Sling as a bridle on a suspended personnel platform. A Wire Rope or Alloy Steel Chain sling is more suited to the task. Refer to the ASME Standard B30.9 – Chapter 5.10 for more detailed information on sling selection and operating practices for Synthetic Webbing Slings. 

Referenced

Q: Ultraviolet (UV) light may negatively affect the capacity of a Synthetic Webbing Sling over time.

True. Ultraviolet (UV) light (from sunlight or welding) degrade the strength of synthetic webbing slings, often without visible indication. Continuous exposure could lead to slight or total degradation of the sling’s load-bearing capacity. Refer to the ASME Standard B30.9 chapter 5.8 for more information on the effects of environment on Synthetic Webbing Slings.  

Referenced

Q: The eye of a Synthetic Webbing Sling may be placed on a hook that has a diameter half the length of the sling eye.

False. The eye of a Synthetic Webbing Sling should not be used with a hook (or any attachment) whose diameter is more than one-third (1/3) of the eye.  If the hook diameter is too large in relation to the eye length it could cause excessive stress on the splices, increase the risk of tearing  and reduce the rated capacity of the sling. Refer to the ASME Standard B30.9 – Chapter 10.4 Synthetic Webbing Slings for more detailed information on rigging practices for Synthetic Webbing Slings. 

Referenced

Q: One cubic foot of solid steel weighs 490 lbs.

True. Steel has a density of  0.284 lbs. per cubic inch, or 490 lbs. per cubic foot.

Referenced

Q: Folding, bunching, or pinching of a Synthetic Webbing Sling is acceptable. 

False. It is not acceptable for a Synthetic Webbing Sling to be folded, bunched or pinched. These conditions cause uneven loading across the width of the webbing which would concentrate stress on a narrow section and significantly reduce the slings rated WLL. Refer to the ASME Standard B30.9 – Chapter 10.4 Rigging Practices for Synthetic Webbing Slings for more detailed information.

Referenced

Q: A Synthetic Webbing Sling must not be used when the horizontal angle is less than 30 degrees. 

True. Refer to the ASME Standard B30.9 – Chapter 10.1 Synthetic Webbing Slings for more detailed information on appropriate operating practices and sling selection. 

Referenced

Q: When a Synthetic Webbing Sling is used in a choker hitch, its capacity is based on an angle of choke angle of less than 90 degrees.

False. The sling’s capacity is based on an angle of choke that is 120 degrees or greater. Refer to the ASME Standard B30.9 – Chapter 10.1 Synthetic Webbing Slings for more detailed information on appropriate operating practices and sling selection. 

Referenced

Q: Synthetic Webbing Slings must be visually inspected every time they are used.

True. Per the Alberta OHS Code Section 294, any rigging that is to be used during a work shift must be thoroughly inspected prior to each period of continuous use by a competent person to ensure it is functional and safe. 

Referenced

Q: The rated load/ WLL (Working Load Limit) of a Wire Rope Sling must not be exceeded. 

True. The WLL of a sling must not be exceeded. Refer to the ASME Standard B30.9 – Chapter 10.1 Synthetic Webbing Slings for more detailed information on the WLL of a Synthetic Webbing Sling. 

Referenced

Q: The applicable legislation and standards to reference for details about Synthetic Webbing Slings is Alberta OHS Code 297 and ASME B30.9.

True. The correct Alberta legislation to reference for information on Synthetic Webbing Slings is the Alberta OHS Code section 297. For detailed information on Synthetic Webbing Slings, refer to the ASME B30.9 Slings standard.

Referenced

Q: Wire Rope Slings should be inspected with bare hands.

False. Wire Rope Slings must be inspected with cautions taken to personnel safety. Damage to wire rope could create sharp edges that could cut or puncture a person’s bare skin. The appropriate cut/puncture resistant gloves should be worn. Refer to the ASME Standard B30.9 – Chapter 10.2 Cautions to Personnel for more detailed information on operating practices for Wire Rope Slings.

Referenced

Q: Wire Rope Slings must be removed from service if they develop ‘bird caging’.

True. A Wire Rope Sling must be permanently removed from service if there is wear over more than one third of the diameter of the rope, if the rope’s structure becomes distorted because of bird-caging,  or if there is evidence of other damage. Refer to the Alberta OHS Code section 306 for more detailed removal criteria on Wire Rope Slings.  

Referenced

Q: Periodic inspections for Wire Rope Slings must be performed, at maximum, every six months. 

False. Periodic inspections must be carried out at least once each year.  Refer to the ASME Standard B30.9 – Chapter 9.4 Wire Rope Slings for more detailed information on periodic inspections for Wire Rope Slings.

Referenced

Q: One cubic foot of solid steel weighs 490 lbs.

True. Steel has a density of  0.284 lbs. per cubic inch, or 490 lbs. per cubic foot.

Referenced

Q: A Wire Rope Sling can only be used if it is marked with its Diameter, WLL and Length.

False. Wire Rope Slings must be marked with the manufacturer’s name or trademark, rated load for specific hitch types/angles, the diameter and the number of legs. Identification tags must be legible. Refer to the ASME Standard B30.9 – Chapter 7.1 Sling Identification for more detailed information on the identification requirements of a Wire Rope Sling. 

Referenced

Q: A Wire Rope Sling must not be used when the horizontal angle is less than 30 degrees. 

True. Refer to the ASME Standard B30.9 – Chapter 10.1 Wire Rope Slings for more detailed information on appropriate operating practices and sling selection when using a Wire Rope Sling. 

Referenced

Q: When a Wire Rope Sling is used in a choker hitch, its capacity is based on an angle of choke of less than 90 degrees.

False. It is based on an angle of choke that is 120 degrees or greater. Refer to the ASME Standard B30.9 – Chapter 10.1 Wire Rope Slings for more detailed information on appropriate operating practices and sling selection when using a Wire Rope Sling. 

Referenced

Q: Wire Rope Slings must be visually inspected every time they are used.

True. Per the Alberta OHS Code Section 294, any rigging that is to be used during a work shift must be thoroughly inspected prior to each period of continuous use by a competent person to ensure it is functional and safe. 

Referenced

Q: The rated load/ WLL (Working Load Limit) of a Wire Rope Sling must not be exceeded.

True. The WLL of a sling must not be exceeded. Refer to the ASME Standard B30.9 – Chapter 10.2 Wire Rope Slings for more detailed information on the WLL of a Wire Rope Sling. 

Referenced

Q: The applicable legislation and standards to reference for details about Wire Rope Slings is Alberta OHS Code 297 and ASME B30.9.

True. The correct Alberta legislation to reference for information on Alloy Steel Chain Slings is the Alberta OHS Code section 297. For detailed information on Alloy Steel Chain Slings, refer to the ASME B30.9 Slings standard. 

Referenced

Q: Periodic inspections for Alloy Steel Chain Slings must be performed, at minimum, once a year.

True. Refer to the ASME Standard B30.9 – Chapter 9-1 Alloy Steel Chain Slings should be referred to for more detailed information on periodic inspections for Alloy Steel Chain Slings. 

Referenced

Q: An Alloy Steel Chain Sling with a missing identification tag can be used as long as you know the chain size and material.

False. A sling missing its identification tag must not be used and immediately removed from service. Refer to the ASME Standard B30.9 – Chapter 9-1 Alloy Steel Chain Slings should be referred to for more detailed information on inspection, removal and repair criteria.

Referenced

Q: One cubic foot of solid steel weighs 360 lbs.

False. Steel has a density of  0.284 lbs. per cubic inch, or 490 lbs. per cubic foot.

Referenced

Q: Personnel must not pass under a suspended load.

True. The Alberta OHS Code section 69 indicates that employers and lifting device operators must ensure that a load does not pass over a person. That includes passing a load over a person as well as a person passing under a suspended load. A load must always travel as low to the ground as possible.  Refer also to the ASME B30.9 Standard on Cautions to Personnel.

Referenced

Q: Performance is based on a temperature range of 0 to 200 degrees Celsius.

False.  The correct answer is -40 to 204 degrees Celsius. Refer to the ASME Standard B30.9 – Chapter 9-1 Alloy Steel Chain Slings should be referred to for more detailed information on the effects of temperature and environment when using an Alloy Steel Chain Sling. 

Referenced

Q: An Alloy Steel Chain Sling must not be used when the horizontal angle is less than 30 degrees. 

True. Refer to the ASME Standard B30.9 – Chapter 9-1 Alloy Steel Chain Slings should be referred to for more detailed information on appropriate operating practices and sling selection when using Alloy Steel Chain Sling. 

Referenced

Q: When an Alloy Steel Chain Sling is used in a choker hitch, its capacity is based on a choke angle of less than 90 degrees.

False. It is based on an angle of choke greater than 120 degrees. Refer to the ASME Standard B30.9 – Chapter 9-1 Alloy Steel Chain Slings should be referred to for more detailed information on appropriate operating practices and sling selection when using Alloy Steel Chain Slings. 

Referenced

Q: Alloy Steel Chain Sling must be visually inspected every time they are used.

True. Per the Alberta OHS Code Section 294, any rigging that is to be used during a work shift must be thoroughly inspected prior to each period of continuous use by a competent person to ensure it is functional and safe.

Referenced

Q: The rated load/ WLL (Working Load Limit) of an Alloy Steel Chain Sling must not be exceeded.

True. The WLL of a sling must not be exceeded. Refer to the ASME Standard B30.9 – Chapter 9-1 Alloy Steel Chain Slings should be referred to for more detailed information on the WLL of an Alloy Steel Chain Sling. 

Referenced

Q: The applicable legislation and standards to reference for details about Alloy Steel Chain Slings is Alberta OHS Code 297 and ASME B30.9

True. The correct Alberta legislation to reference for information on Alloy Steel Chain Slings is the Alberta OHS Code section 297. For detailed information on Alloy Steel Chain Slings, refer to the ASME B30.9 Slings standard. 

Testing Your Knowledge

Comprehensive training is a continuous process that extends beyond initial orientation. To assist in the ongoing education of workers, we have developed a series of short, product-specific quizzes designed to reinforce key safety principles and technical standards. These quizzes serve as an effective self-assessment tool or as a supplementary training resource to ensure that personnel maintain a high level of proficiency when handling rigging equipment. By validating theoretical knowledge alongside practical application, employers can better support a safe, competent, and compliant worksite.

Test your understanding of rigging standards and best practices with our product quizzes below.

Fulfilling Your Responsibility

A toolbox talk (or toolbox meeting) is a short, focused safety discussion held on the worksite to reinforce key hazards, review safe work practices, and address issues relevant to the tasks at hand. It is considered a supplementary form of training because it supports, but does not replace, the formal education and instruction required under Alberta’s Occupational Health and Safety Act, Regulation, and Code.

Alberta legislation requires employers to ensure that workers are competent to perform their jobs safely and are provided with the training, supervision, and information needed to protect their health and safety. Toolbox talks help employers meet these responsibilities by keeping safety knowledge fresh and encouraging regular communication.

They also support workers’ legislated rights to know about hazards, participate in health and safety discussions, and express concerns about unsafe conditions. By involving workers directly in these brief, practical conversations, toolbox talks strengthen shared responsibility and help maintain a safe and informed worksite.

Find an assortment of rigging related toolbox talks ready to be used below.

Quick Reference: Verified Competence

Workers conducting tasks related to rigging must have the knowledge, training, experience, skills and physical ability to conduct the work safely and as required by their employer..  For more information on personal competence, refer to the applicable ASME B30 Standard. 

Per the Alberta OHS Code, a competent person is someone who is trained, qualified and has experience completing rigging tasks safely on their own, without supervision. 

  • Qualified means: someone who has earned their qualifications through a formal education program or acquired them through a combination of education and practical experience.
  • Trained means: training was received that was appropriate to the tasks, equipment and environment in which they will be performed or used.
  • Experienced means: a person has sufficient and adequate knowledge to perform the task with little or no supervision. 

While these are essential components of competence, a worker’s qualifications, training, and experience alone do not guarantee that work will be performed safely each time. It is the employer’s responsibility to conduct training and competency assessments at periodic intervals.

Below are competency evaluation forms that can be used by an employer or supervisor to assess a worker’s competency when conducting tasks involving rigging and rigging equipment.