Sling Inspection Checklist: Hercules How-To

sling inspection checklist

SLING INSPECTION CHECKLIST

Sling inspection is an important part of a rigger’s daily routine – here’s a sling inspection checklist to make life easier.

Check out our sling inspection checklist that includes removal criteria to know when your sling should be removed from service, and help keep your lifting equipment in good, working order. 

You’re welcome. 

SLING INSPECTION: ASME STANDARDS B30.9 

INITIAL INSPECTION 

  • Before use, all new, altered, modified or repaired slings shall be inspected by a designated person. 

FREQUENT INSPECTION

  • A visual inspection for damage shall be performed by the user or other designated person each day or shift the sling is used.

PERIODIC INSPECTION

  • A complete inspection for damage of the sling shall be periodically performed by a designated person.

ROUND SLINGS: SLING INSPECTION CHECKLIST

Remove your synthetic round sling for service if these conditions are present: 

  • Missing or illegible sling identification.
  • Acid/caustic burns.
  • Evidence of heat damage.
  • Holes, tears, cuts, abrasive wear or snags that expose the core yarns.
  • Broken or damaged core yarns.
  • Weld splatter that exposes core yarns.
  • Knots in the round sling,  except for core yarns inside the cover.
  • Fittings that are pitted, corroded, cracked, bent twisted, gouged, or broken.
  • For hooks, removal criteria as stated in ASME B30.10.
  • For rigging hardware, removal criteria as stated in ASME B30.26.
  • Other conditions, including visible damage, that cause doubt as to the continued use of the sling.

CHAIN SLINGS: SLING INSPECTION CHECKLIST

Remove your alloy chain sling from service if these conditions are present: 

  • Missing or illegible sling identification (see Section 9-1.7).
  • Cracks or breaks.
  • Excessive wear, nicks, or gouges. Minimum thickness on chain links must not be below the values listed in Table 1.
  • Stretched chain links or components.
  • Evidence of heat damage.
  • Excessive pitting or corrosion.
  • Lack of ability of chain or components to hinge (articulate) freely.
  • Weld splatter.
  • For hooks, removal criteria as stated in ASME B30.10.
  • For rigging hardware, removal criteria as stated in ASME B30.26.
  • Other conditions, including visible damage, that cause doubt as to the continued use of the sling.

SYNTHETIC WEB SLINGS: SLING INSPECTION CHECKLIST

Remove your synthetic web sling from service if the following conditions are present: 

  • Missing or illegible sling identification (see ASME Section 9-5.7).
  • Acid or caustic burns.
  • Melting or charring of any part of the sling.
  • Holes, tears, cuts or snags.
  • Broken or worn stitching in load bearing splices.
  • Excessive abrasive wear.
  • Knots in any part of the sling. Discoloration and brittle or stiff areas on any part of the sling, which may mean chemical or ultraviolet/sunlight damage.
  • Fittings that are pitted, corroded, cracked, bent, twisted, gouged, or broken.
  • For hooks, removal criteria as stated in ASME B30.10.
  • For rigging hardware, removal criteria as stated in ASME B30.26.
  • Other conditions, including visible damage, that cause doubt as to the continued use of the sling.

INSPECTION FREQUENCY

How often should you inspect your slings? Frequency is based on these factors: 

  • Frequency of use
  • Severity of service conditions
  • Nature of lifts being made
  • Experience gained on the service life of slings used in similar circumstances. 

NOTE ON SAFETY & REPAIRS

Slings must be repaired by the sling manufacturer, or a qualified person, per ASME B30.9. 

As mentioned above, a sling must be inspected by a designated competent person before it’s used to determine that the sling meets the manufacturer’s required specifications. 

Employers must take necessary measures to protect and ensure the health, safety and physical well-being of every worker. The employer must use methods and techniques intended for the identification, control and elimination of risks to their workers. The inspection of lifting equipment is required to satisfy this obligation.


Hercules SLR is part of the Hercules Group of Companies which offers a unique portfolio of businesses nationally with locations from coast to coast. Our companies provide an extensive coverage of products and services that support the success of a wide range of business sectors across Canada including the energy, oil & gas, manufacturing, construction, aerospace, infrastructure, utilities, oil and gas, mining and marine industries.

Hercules Group of Companies is comprised of: Hercules SLRHercules Machining & Millwright ServicesSpartan Industrial MarineStellar Industrial Sales and Wire Rope Atlantic.

Webbing Sling Q&A: Heavy-Duty Strength for Delicate Lifts

webbing sling from hercules slr

WEBBING SLING: EVERYTHING YOU NEED TO KNOW

If you’re a rigger or work in material handling, you likely encounter webbing slings often in your work. A synthetic webbing sling is fantastic to lift delicate or soft materials, since their soft surface offers more protection than abrasive materials, like wire rope. 

Webbing slings come in two types — duplex and simplex. A duplex webbing sling is made with two synthetic fabric layers stitched together for extra reinforcement. A simplex webbing sling is made with only one synthetic fabric layer.

“Just one layer? That won’t do anything,” you might be thinking—but how wrong you’d be! Even though a webbing sling may not have the same reputation for strength as say, steel, a webbing sling is surprisingly strong. 

There are some misconceptions and often-asked questions about synthetic materials in the industry—so we’ve asked Hercules SLR experts from our Brampton, Ontario branch to help. 

Read on to find out the questions we hear about webbing slings, and how our experts’ answer. 

Q: What are they usually made from? 

Answer: A flat webbing sling is usually made from woven polyester, nylon (otherwise known as polyamide) and polypropylene.   

Q: Do flat webbing slings come in just one width? 

Answer Flat webbing slings come in different widths – but their ultimate flexibility and strength is noted by the number of webbing layers stitched together. 

webbing sling at hercules slr

Q: Should I use paint or dye to colour code webbing slings? This should help me identify them quickly and easily, right?

AnswerNO! Don’t use paint to colour code webbing slings—the solvents in the paint could corrode the synthetic material. A torn or broken sling is unsafe, and will drastically reduce it’s SWL. To identify a synthetic sling’s material, look for the label colour: 

Polyester (PES)—Blue Label, or blue with a green line down the center of the webbing. 

Polyamide (PA)—Green label

Polypropylene (PP)—Brown label

Q: What chemicals will affect webbing slings?

Answer: Polyester isn’t affected much by acid, but alkali’s will damage a polyester webbing sling. An alkali, or alkaline is basically a substance with a pH level higher than 7. Examples of alkali substances are sea water, baking soda, bleaches, lye and even blood. Polyamide’s are basically immune to alkali damage, but are damaged by even moderately-strength acids. They can also lose up to 15% of their SWL when wet. Polypropylene is resistant to acids and alkali’s, which makes them a good choice when you have to lift something which needs protection from chemicals. Be sure the polypropylene is stabilized to protect from ultraviolet degrading. 

Q: What markings should I look for on a webbing sling?

Answer: Look for the safe-working load (SWL), identification number and the label’s colour code.

 Q: How do I store my webbing sling?

AnswerIt definitely matters! Be sure to store your slings in a dry, cool place. Keep them out of sunlight or other ultra-violet radiation, and don’t store them in damp conditions. 

Q: So, they’re really strong – does that mean I can use them to lift anything? 

AnswerDon’t use a webbing sling for a critical lift! Make sure you use extra caution and have a detailed lifting plan for using a webbing sling with delicate or fragile lifting operations. 

Q: Okay, so what’s a critical lift?!

Answer: A critical lift is defined by WorkSafe BC as a lift with high risk factors that could cause the crane or hoist to fail, or poses a significant potential harm to human life. A critical lift is also one that needs a detailed rigging plan before the operation. 

Other factors that can make a lift critical are: 

  • When a piece of powered lifting equipment exceeds it’s rated capacity by 75%;
  • A mobile crane or boom truck goes over rated capacity by 90% lifting a load over 50% of its maximum permitted load radius; 
  • Tandem lifts— which is when more than one piece of powered lifting equipment is used, or is used to lift another piece of lifting equipment);
  • A person is being lifted;
  • The load is under-water or submerged. 

Q: Can I tie a knot in a webbing sling to make it shorter?

Answer: Never! Don’t knot, tie or twist a webbing sling. Don’t manipulate the sling’s angle, either—use the sling however the angle forms naturally.  

hercules slr webbing sling formation types
Figure 1—Webbing Sling Types

Q: When should I not use a webbing sling? 

Answer: Don’t use a webbing sling if you don’t know the SWL. Don’t use if the eyes or other part of the webbing sling is damaged, if the sling’s eye opens more than 20°. There are 5 different types of possible webbing sling eye formations—see figure 1. If using a Type 1 webbing sling (called a choker sling), be sure to protect the eye before use. 

Q: What should I keep in mind when using a webbing sling? 

Answer: There are a few things to consider to use a webbing sling safely—you should always: 

  • Avoid shock-loading;
  • Protect the sling with sleeves when sharp edges could tear its fabric—friction can cause heat damage, which is the most common form of ‘heat’ damage to webbing slings. To prevent, don’t let the sling run along the load’s surface and that it’s not pulled on any sharp corners. This is also known as ‘point loading’, when the load is pulled on a sharp corner, creating heat which results in heat fusion in the sling material. 
  • Never pull a sling from underneath a load.

DOWNLOAD OUR SYNTHETIC SLING INSPECTION GUIDE

References: https://en.oxforddictionaries.com/definition/alkali, https://www.worksafebc.com/en/law-policy/occupational-health-safety/searchable-ohs-regulation/ohs-regulation/part-14-cranes-and-hoists 

Hercules SLR is part of the Hercules Group of Companies which offers a unique portfolio of businesses nationally with locations from coast to coast. Our companies provide an extensive coverage of products and services that support the success of a wide range of business sectors across Canada including the energy, oil & gas, manufacturing, construction, aerospace, infrastructure, utilities, oil and gas, mining and marine industries.

Hercules Group of Companies is comprised of: Hercules SLRHercules Machining & Millwright ServicesSpartan Industrial MarineStellar Industrial Sales and Wire Rope Atlantic.

We have the ability to provide any solution your business or project will need. Call us today for more information. 1-877-461-4876. Don’t forget to follow us on FacebookTwitter and LinkedIn for more news and upcoming events.

Crane Equipment: cranes, chains & automobiles

crane equipment, hercules slr, rigging services

Cranes have been used since the first century – in that time, they were powered by humans or animals to lift heavy loads. Cranes have adapted and come a long way since – they now use an assortment of crane equipment and hardware to lift, lower and even sometimes move horizontally.

Read on to learn more about the modern variety of crane equipment available and Hercules SLR’s tips for using it.

CRANE EQUIPMENT: an overview

For rigging with cranes, different types of lifting equipment (also known as tackle) are used. These include:

  • Wire Rope Slings
  • Synthetic Slings
  • Shackles
  • Snatch Blocks
  • Hooks
  • Chain Hoists
  • Chain Pullers
  • Eye Bolts
  • Tirfors
  • Jacks
  • Lifting Beam
  • Spreader Beams
  • Beam Clamps
  • Plate Clamps

CRANE EQUIPMENT: wire rope slings

Pay special attention to wire rope slings as they are susceptible to servere wear, abrasion, impact loading, crushing, kinking and overloading – small changes in the slings’ angle affect the safe working load of the sling. Care should be taken around rough edges and wire rope slings – even an edge you might not consider ‘sharp’ can make considerable damage to your wire rope sling, making it unsafe and ineffective. Use sleeves, wear pads or corner protectors to protect your wire rope sling from damage.

Be sure to not drop a load or run a load over the sling – this will crush the sling. Also, don’t stop and start suddenly while you lift and lower with a wire rope sling, as this increases the slings’ stresses and increases possible failures.

WIRE ROPE SLING SPLICES

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WIRE ROPE SLING IDENTIFICATION 

There are three ways to identify wire rope slings: the SWL, I.D. number and certificate number.

  1. Hard-stamped on ferrule
  2. A tag which has a wire running through the tag and eye of the sling
  3. Large metal washer where the wire of the sling is passed through when you make the eye of a sling

WIRE ROPE CONFIGURATIONS

There are three main wire rope sling configurations:

  1. Double-Choker Hitch
  2. Pair of Double Wrap Chokers
  3. Single Choker Hitch

Round slings’ are versatile – they’re strong, yet delicate to the load to lift. They’re light, flexible in many directions and malleable which is especially helpful when lifting an awkward or delicate load.

crane-equipment-hercules-slr
Synthetic Round Sling Label

CRANE EQUIPMENT: synthetic round slings 

Round slings’ are not easily damaged by sunlight, humidity, grease, dirt or seawater. Round slings’ are identified by the colour of the label, and also have the SWL on it.

CRANE EQUIPMENT: web slings 

Web slings are suited for particularly those that can be easily damaged. They’re easy to damage if you use them improperly – your web sling shouldn’t touch a sharp edge, heat or chemicals that will cause damage.


CRANE EQUIPMENT: hardware

SHACKLES

For crane lifting, two different shackles are typically used – bow and d-shackles. When using synthetic slings with a crane, two types of shackles are available, wide sling shackle and a round sling shackle. Web sling shackles are wider and bow out in the middle, and round sling shackles are narrow and sometimes have small valleys in the shackle bow, which supports the synthetic strands better.

These prevent the sling from bunching and pinching, which can be an issue with bow or d-shackles – it also reduces the SWL capacity of the sling.

To use shackles for crane lifting safely, follow these tips:

  • Don’t replace the shackle pin with a bolt – only the proper fitted pin should be used. Bolts aren’t meant to take the bend that a pin can handle.
  • Pins must be straight and all-screw pins must be completely seated
  • Cotter pins should be used with all round pin shackles
  • Shackles worn at the crown or pin by over 10% of original diameter should be removed from service and destroyed.
  • Don’t pull your shackle at an angle with a sling or hoist rope – this reduces the shackle’s capacity by 50%. Spacers can be used to centralize the load on the pins with spacers.
  • Don’t use screw pin shackles if the load can roll under load and unscrew

SHEAVE BLOCKS

A sheave block is a single, or multi-sheave block which opens on one side – this opening allows a rope to be pulled over the sheave and eliminates the need to be threaded through the block. When crane lifting with wire rope, sheave blocks can be purchased with configurations for hook, shackle, eye and swivel fittings.

  • Sheave blocks are normally used when it’s necessary to change the direction of pull on the line. When this happens, the stress on the sheave block is significantly greater than the angle between the lead and load lines. 
    crane equipment, rigging services, hercules slr, Crane Equipment: cranes, chains & automobiles
    Pulley with a sheave on a mobile lifting crane, with 25-ton lifting capability
  • When the lines are parallel, 1000lbs on the lead line results in double the weight on the block—2000lbs on block, hook and whatever the connection points are attached to. As the angle between lines increases, the stress on the block and hook is reduced.

HOOKS

Many different hooks are available for lifting and rigging operations – check with manufacturer instructions and warnings before using in a crane application.

When using hooks to lift with a crane, follow these tips:

  • Ensure hoisting hooks are fitted with safety latches (except grab and sorting hooks)
  • Inspect hooks often, looking for wear in the hook’s saddle – check for cracks, corrosion and if the hook’s body is twisted.
  • Inspect the shackle’s throat opening – if the hook’s been overloaded or is weak, the throat will open. If this is the case, remove from service and destroy so no one else attempts to use it.
  • Inspect for cracks in the hook’s saddle and neck
  • Be sure the hook is stamped with its SWL
  • Note that the SWL applies when the load is in the saddle of the hook, as this reduces the SWL.

TURNBUCKLES 

Turnbuckles are sometimes called rigging screws and can be supplied with eye end, jaw end, stub end fittings and/or a combination of these.

  • Use turnbuckles fabricated from alloy steel with weldless construction.
  • If turnbuckles have end fittings, ensure hooks are fit with safety latches.

CHAIN HOISTS / CHAIN BLOCKS 

Chain hoists are often used with cranes to move larger equipment and machinery. Chain hoists vary in size and length, and require little effort to execute a lift.

Chain hoists are durable, but can be damaged easily. To prevent damage, check:

  • The SWL is right for the application/load
  • The chain hoist has been inspected or certified by a third party
  • The hoist’s body is free of cracks or broken castings
  • The hook isn’t deformed and is fit with a safety latch
  • Anchor pins are in place correctly, and are the right type
  • Chain is in good working condition
  • SWL is clearly marked on the chain hoist block

A lever hoist is similar to a chain hoist, but operates slightly different with a lever to lift and lower the load – it can also be used to pull loads.

EYE BOLTS 

When lifting with a crane and eye bolts, ensure eye and ring bolts are made of alloy steel and have shoulders or collars.

Do not load eye bolts at an angle – angular loading reduces the weight of the load they can safely support.

TIRFOR

A tirfor is a mechanical device, equipped with a level handle to operate. They’re used to pull and add tension, and can also be used to lift if they have blocks.


Hercules SLR is part of the Hercules Group of Companies which offers a unique portfolio of businesses nationally with locations from coast to coast. Our companies provide an extensive coverage of products and services that support the success of a wide range of business sectors across Canada including the energy, oil & gas, manufacturing, construction, aerospace, infrastructure, utilities, oil and gas, mining and marine industries.

Hercules Group of Companies is comprised of: Hercules SLRHercules Machining & Millwright ServicesSpartan Industrial MarineStellar Industrial Sales and Wire Rope Atlantic.

We have the ability to provide any solution your business or project will need. Call us today for more information. 1-877-461-4876. Don’t forget to follow us on FacebookTwitter and LinkedIn for more news and upcoming events.

Shackles: A Hercules Hardware How-To

shackles-hercules-rigging

Shackles are typically used as connection points for lifting equipment in many securing and rigging applications.

The type of shackle you use will depend on the lifting operation—Each has a slightly different design to suit them to various functions. There are three main types of shackles typically used for lifting applications:

  1. Dee
  2. Bow (commonly known as an anchor shackle)
  3. Screw Pin (commonly known as a grab)
    shackles-d-shackle-hercules-rigging
    D-Shackle
Dee Shackle
shackles-screw-pin-shackle
Screw pin shackle with cotter/split pin

Dee shackles are mostly used for single-point lifting.

Bow Shackle
shackles-bow-shackle
Bow Shackle

Bow Shackles are designed to be used to carry out multi-point lifts.

Screw Pin/Grab Shackle

Screw Pin or Grab Shackles are used when the shackle is required to pass through an opening, like a pipe or over an object. It is designed with a countersunk pin to facilitate this.

  • Used where a shackle is removed on a regular basis
  • When fitted, the pin must engage with the shackle body and tighten fully
  • Screw pins can be moussed in place for long-term applications, or when there’s a risk of the pin backing out due to vibration, etc. Confirm with your supervisor to make sure this is accepted on your worksite.
Bolt Types: Nut, Bolt and Cotter Pins
  • The bolt type pin (bolt, nut or cotter) is used when a load is permanent or semi-permanent.
  • This requires the rigger to insert a split pin, which captivates the nut on the pin.
  • If fitted correctly, the pin will rotate freely within the shackle body.
Round Pins

The round pin is commonly use for tie-down, suspension, towing and straight line lifting only. Don’t use round pins with multiple slings or where side loading may occur.

Pin Sizing
  • A shackle will be sized from the diameter of the bow, not pin.
  • A pin of a shackle is usually one size larger than the bow to achieve the strength of the bow. Consider this when you order a shackle for specific jobs, like a lifting lug.
Pin Replacement

Never replace a shackle’s pin with:

  • A bolt
  • A differently branded pin
  • An incorrect pin size

Angular Loading

  • Do not exceed included angle of 120° when rigging with shackles and multiple slings.
  • Apply reductions in WLL when you use shackles loaded at angles

Specialty Shackles

Round and web sling shackles that are used with synthetic slings look slightly different.

  • Wide body shackles have a larger D/d ratio for the sling, and improve the life and efficiency of the sling.
  • ROV or remotely operated vehicle shackles are painted bright yellow or white so they are visible in dark waters, the pin is also easier to access with a ROV.
  • Web sling shackles are wider and bow out in the middle
  • Round sling shackles are narrow and sometimes have tiny valleys in the bow of the shackle so the strands are better supported.

How-To: Your Pre-Use Check

Before you use your shackle, you must inspect the following on all shackles:

  • Markings are present, correct and legible including: manufacturer, working load limit (WLL), size, grade/material type
  • The correct pin is fitted
  • No visible signs of damage to the body or pin like nicks, gouges, deformations, stretch, bends, corrosion, etc.
  • No evidence of misuse

In addition to your pre-use check, be sure to avoid swing loading and shock loading, secure sling legs not in use, never leave a load suspended—or walk under it.

How it’s Made

Lifting shackles are manufactured using the drop-forge process.

The drop forge process involves a steel rod hammered with a large ‘drop’ hammer, and a die is fitted to it. This die has the upper impression of a shackle cut into it and this shape imprints on the steel rod. A fixed die has the lower impression of the shackle.

The forged shackle is heated then treated—this ensures a uniform structure and gives the shackle it’s desired uniform thickness.


Blogs

For more on shackles, check out our blogs below:


Hercules SLR is part of the Hercules Group of Companies which offers a unique portfolio of businesses nationally with locations from coast to coast. Our companies provide an extensive coverage of products and services that support the success of a wide range of business sectors across Canada including the energy, oil & gas, manufacturing, construction, aerospace, infrastructure, utilities, oil and gas, mining and marine industries.

Hercules Group of Companies is comprised of: Hercules SLRHercules Machining & Millwright ServicesSpartan Industrial MarineStellar Industrial Sales and Wire Rope Atlantic.

We have the ability to provide any solution your business or project will need. Call us today for more information. 1-877-461-4876. Don’t forget to follow us on FacebookTwitter and LinkedIn for more news and upcoming events.

CM Guest Blog: 3 Safety Tips to Install your CM Trolley

cm-trolley-hercules-slr

Read on to discover tips from rigging and load securing experts at Columbus McKinnon – today, they’re sharing their top three safety tips to remember when you install your CM trolley.

Whether it’s a hoist, trolley or rigging equipment, proper use, inspection and maintenance is important to ensure operator safety at all times. Operators of material handling equipment should adhere to the manufacturer’s installation, inspection and maintenance requirements outlined in the product’s operation and maintenance manual (O&M manual).

Beam clamps and trolleys are critical components of a complete lifting system and demand the same attention to safety as hoists and below-the-hook rigging. The following three safety tips are important to consider when installing and inspecting a CM Series 633 Trolley.

1. CM Trolley Safety Tip: Consider the flange and shape of the I-beam to ensure proper fit and clearance. Measure the I-beam flange and check the distance between track wheel flanges. This distance should be 1/8 to 3/16 inch greater than the beam flange width for a straight runway. Additional clearance may be required for the trolley to negotiate track sections with curves. This clearance should be kept to a minimum to ensure the trolley operates properly on both the straight track sections and the curved track sections. See Figure 1.

cm-trolley-hercules-slr-rigging
Figure 1

2. CM Trolley Safety Tip: Ensure the equalizer pin nuts have been installed properly, in accordance with the O&M manual recommendations. The pins should be tight and locked position. Nuts should be regularly inspected to ensure they’re tight and secure during periodic inspections, which can be monthly or yearly – depending on service. Refer to your O&M manual, and/or ASME Standard B30.17.

3. CM Trolley Safety Tip: It is recommended that the trolley is mounted to the hoist prior to final installation onto the beam. Follow the washer and spacer instructions in your O&M manual to properly set the trolley based on the application’s beam flange width.

Please note: washer and spacer arrangement recommendations shown in the O&M manual are affected by structural variations. The accuracy of the final adjustment should be verified by the installer to ensure proper clearance is achieved between the trolley wheel flanges and the toe of the runway beam. See Figure 2.

cm-trolley-hercules-slr-rigging-services
Figure 2

Remember, any trolley installation should always be done in accordance with the manufacturer’s instructions or the recommendations of a qualified person. Improper installation can cause unequal loading on the trolley and side beam, and as a result can cause the trolley to fall from the beam. It’s also recommended that a load test is performed to 100-125% of the rated capacity of the crane after installation.

Want more CM? Visit our Columbus McKinnon brand page for more information on Hercules SLR’s CM offerings.

Reprinted with permission via Columbus McKinnon – original article here


Hercules SLR is part of the Hercules Group of Companies which offers a unique portfolio of businesses nationally with locations from coast to coast. Our companies provide an extensive coverage of products and services that support the success of a wide range of business sectors across Canada including the energy, oil & gas, manufacturing, construction, aerospace, infrastructure, utilities, oil and gas, mining and marine industries.

Hercules Group of Companies is comprised of: Hercules SLRHercules Machining & Millwright ServicesSpartan Industrial MarineStellar Industrial Sales and Wire Rope Atlantic.

We have the ability to provide any solution your business or project will need. Call us today for more information. 1-877-461-4876. Don’t forget to follow us on FacebookTwitter and LinkedIn for more news and upcoming events.

Poly-What?! All About Synthetic Slings

what-are-synthetic-slings

Synthetic slings are generally available in two varieties – flat-woven web slings and round slings. Textile slings should perform in accordance with ASME standards B30.9-5.

Synthetic Slings: flat-woven web sling (or webbing sling)

Synthetic flat-woven web slings are usually made with woven polyester, polyamide (which is a fancy word for nylon) or polypropylene, and have an eye (basically, a loop) stitched at each end. They are available in Simplex (one layer) or Duplex (two layers).

Web slings are made with a safety factor of at least 5:1 – although other industries may require a higher safety factor.

Synthetic Slings: round slings

Round slings (also known as ’roundslings’) are made from load-bearing fibres with a protective, abrasion-resistant outer later. Their round form is known as ‘endless construction’, and are available in different lengths and capacities.

Synthetic Slings: beat the heat

Consider the temperature of both your surroundings and the load you will lift – synthetic materials have selective resistance to heat, which will effect which sling you choose.

Synthetic sling heat ranges are:

  • Polyester and polyamide: -40°C to 100°C
  • Polypropylene: -40°C to 80°C

These synthetic materials protect against a variety of chemicals, however – they offer different levels of protection against chemicals like acids. Synthetic sling chemical resistance is:

  • Polyamide (Nylon): Resistant to the effects of alkalis, but is attacked by acids.
  • Polyester: Resistant to acids, but damaged by alkalis.
  • Polypropylene: Shows little affect from acids or alkalis. Sustains damage from solvents and paint.
Synthetic Slings: colour codes

Synthetic material in slings are colour coded, in order to identify them properly. The label will be a specific colour, and may also have the type of material written as an abbreviation.

The colour codes are:

what-are-synthetic-slings-
Figure 1: Synthetic Sling Labels

 

Synthetic Slings: eye formations
what-are-synthetic-slings
Figure 2: web sling types

The loop at the end of the web sling is called an eye formation – there are various formations to suit different applications.

There are six different types of web sling types – see figure 2. The six names for these slings are:

  • Type 1—Choker
  • Type 2—Basket
  • Type 3—Eye & Eye
  • Type 4—Twisted Eye
  • Type 5—Endless
  • Type 6—Reversed Eye
Synthetic Sling: round slings

These are made with multiple, high-tenacity yarns, which are covered with a protective sleeve. These are usually made from polyester – but, polyamide (nylon) and polypropylene are available too.

To identify these slings, an identification label is sewn into the cover which details user information and traceability requirements.

They are flexible, light-weight and very flexible.

Synthetic Sling: pre-use inspection

Follow these steps before using your synthetic sling each time – this will ensure you and coworkers will stay safe, and eliminates potential of the sling breaking and damaging the load.

If you find damage on your synthetic sling, it should be removed from service immediately – refer it to a competent person to have it inspected and repaired if necessary.

During your pre-use check, you should:

  • Check the sling label is present and legible and includes manufacturer, rated load for at least one hitch, material type, number of legs (if more than one) and the manufacturers code/stock number.
  • Check that the sling body has no signs of tears, cuts or severe abrasion
  • Check formed eyes for damaged stitching
  • Verify end fittings (where present) function correctly and are undamaged.
  • Check for signs of chemical damage.
  • Check that sling has undergone its periodic thorough inspection.
  • No knots in sling.
Synthetic Slings: shackles, hooks n’ hardware

When you attach a sling to hooks or shackles, take care to ensure the slings don’t bunch around the accessory. Bunching can cause damage since only a portion of the webbing supports the load.

When securing a load with webbing slings, don’t be concerned with the d/d ratio (diameter around the bent sling divided by the body diameter of the sling) – but you must consider the width of the webbing. Follow the manufacturer’s recommendations when you lift with synthetic web slings.

what-are-synthetic-slings
Note: the sling that lies in the shackle fits perfectly – there’s no bunching or a sling that protrudes from the shackle pin.

Hercules SLR – Custom Rigging and Lifting Solutions

Hercules SLR offers custom lifting solutions. We’ll match you with the best equipment and hardware for your project needs, and we’ll customize equipment to meet your specifications.

Need a lift? Drop us a line at info@herculesslr.com to speak with one of our rigging experts – we’ll take you where you need to be.

Need proof? Read about the Frankensling we made for The Town of Oakville Marina, our rigging fundamentals course that Hercules staff from across Canada completed at the Hercules Training Academykeep your synthetic round slings in good working order with our Free Downloadable Synthetic Round Sling Inspection Guide or read our blog on how to prevent synthetic round sling damage.


Hercules SLR is part of the Hercules Group of Companies which offers a unique portfolio of businesses nationally with locations from coast to coast. Our companies provide an extensive coverage of products and services that support the success of a wide range of business sectors across Canada including the energy, oil & gas, manufacturing, construction, aerospace, infrastructure, utilities, oil and gas, mining and marine industries.

Hercules Group of Companies is comprised of: Hercules SLRHercules Machining & Millwright ServicesSpartan Industrial MarineStellar Industrial Sales and Wire Rope Atlantic.

We have the ability to provide any solution your business or project will need. Call us today for more information. 1-877-461-4876. Don’t forget to follow us on Twitter, LinkedIn and Facebook for more news and upcoming events.

Behind-the-Scenes: Life of a Slingmaster Sling

slingmaster-sling-hercules-slr-rigging

slingmaster-slingA SlingMaster sling lives a short,  but full life. We’ve covered the less-talked about non-destructive testing here  and here – but what exactly does destructive testing look like, and why do we use it?

Destructive testing is the process used to test a product and find its ultimate load (the load at which the item being tested fails or no longer supports the load) – in this case, a SlingMaster webbing sling’s breaking or tensile strength. This helps our riggers’ determine how our slings perform under different conditions.

First, one of our industrial seamstresses measures and cuts the length of the sling.

Then, the sling travels to our warehouse for destructive testing. The buttons are pressed, and the stretch begins.

The sling is pulled from each end with increasing force applied in increments – this mimics the sensation of a sling supporting a load.

Watch the video below to see the life-cycle of a SlingMaster sling – from birth, to death-by-destructive testing:

Did you know Hercules SLR offers custom rigging solutions? If you have something you want to lift, lower, hoist or move – give us a call. We’ll take you there.

Speak with one of our experts and let us find you the best sling for you or your company’s needs – e-mail us at info@herculsslr.com or call us at 1 (877) 461-4876 for more information.


Hercules SLR is part of the Hercules Group of Companies which offers a unique portfolio of businesses nationally with locations from coast to coast. Our companies provide an extensive coverage of products and services that support the success of a wide range of business sectors across Canada including the energy, oil & gas, manufacturing, construction, aerospace, infrastructure, utilities, oil and gas, mining and marine industries.

Hercules Group of Companies is comprised of: Hercules SLRHercules Machining & Millwright ServicesSpartan Industrial MarineStellar Industrial Sales and Wire Rope Atlantic.

We have the ability to provide any solution your business or project will need. Call us today for more information. 1-877-461-4876. Don’t forget to follow us on FacebookTwitter and LinkedIn for more news and upcoming events.

Hercules Training Academy: Securing, Lifting & Rigging

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Hercules Training Academy: First Course Complete

The Hercules Training Academy is open for training—last week Hercules was thrilled to have eight employees hailing from across Canada participate in our first ever training program. Employees from CSR, sales and management gathered at Hercules’ new, purpose-built specialized Training Academy in Dartmouth, NS to learn the ins and outs (quite literally)—of securing, lifting and rigging in our first specialized training course.

Training Academy Facilities

What makes Hercules’ Training Academy ‘specialized’? Our equipment, for one. Our new custom crane is built into the warehouse floor and can lift up to 10 tonnes—pieces of concrete were actually torn up in order to fix the crane to the floor. This gives our employees experience working with larger, more realistic loads that one may commonly see on a job site.

hercules-training-academy-classroom--sling-chain

In addition to the large crane, we have two smaller, portable cranes—these can be used for activities outdoors or on the warehouse floor, and allow trainee’s to practice securing, lifting and rigging in various settings.

In addition to the rigging equipment available at the Training Academy, there are two new classroom spaces. Trainees spend a time in the classroom learning various details, features and differences between equipment like hoists, buckles and slings. Then, they take their knowledge to a practical setting.

This combination of practical and classroom experience is invaluable for our clients and customers.

“I’ve learned so much on the course that will help my understand my customers’ needs much better. I know what’s a workable solution, and how to interpret the needs of the clients’ project,” says Keyne, a CSR from Hamilton, Ontario.

One activity included Hercules’ employees hoisting and lifting objects up and through holes outdoors, which mimicked the challenges of rigging objects into the top of a larger structure, like a boat. Another required employees to secure, lift and rig irregular shaped objects into a shipping container. This showed our employees some of the challenges workers face onsite—things like balancing a large objects’ centre of gravity, evenly distributing a heavy load and properly securing misshapen objects.

Dwayne Fader, Business Development Manager (and former rigging technician!) at Hercules explained some of the common misconceptions and complications workers face with rigging a heavy load. “There is so much more math involved than you think—I’ve never used it more than when I worked in rigging. You have to make sure things are even, balanced and fit correctly—all more challenging than it seems.”

Commitment to Learning

Hercules truly believes that experience is the best teacher, which is why we developed the Training Academy. When we teach our employees how to work with the products we sell, and get a ‘taste’ of what the job is actually like, they gain a whole new insight towards issues our customers and clients face daily—and are able to offer practical solutions and advice. Simply put—our employees don’t just ‘talk the talk’, but can ‘walk the walk’, too.

TJ, a Sales Manager from  Langley, BC says “The Training Academy session was fantastic. I’ve learned more useful skills than I expected, and it’s been fun! The hands-on activities really helped me understand what I was learning. It made me realize what’s great in theory, and then what you actually need to do to make that theory workable.”

Hercules’ employees gained a lot from their time at the Training Academy, and many are excited to do again.

“If there’s a Rigging 2—I want to be on it! I learned stuff I never knew I needed to know, and it’s been FUN.”  says Quincy, an Inspector from Hamilton, Ontario. “Who ever thought I’d use ‘work’ and ‘fun’ in the same sentence? But I have—and it was!”

Hercules offers practical, hands-on learning programs designed to exceed minimum safety requirements. These courses can be customized to fit the specific needs of your workplace, and can be provide training on-site or at a Hercules facility.

We’ve always been committed to providing specialized training—see the table below to discover our available training courses. 

Current Courses Offered:
Power Operated Work PlatformsChain Saw Safety

Confined Space Entrant & Attendant (CSEA)

Fall Protection

Fundamentals of Rigging with Practical

Forklift Safety (Narrow Aisle or Counterbalance)

Lock Out Tag Out

Red Cross Emergency First AidRed Cross Standard First Aid

Fall Rescue Systems

WHMIS 2015 with GHS

Fundamentals of Overhead Cranes

Fundamentals of Rigging

Offshore Rigger Banksman

Overhead Crane Operator

There really is no substitute for experience. All in all, Hercules’ employees had a similar takeaway. Marc, a Manager from Quebec, explains “This week has been amazing. I learned so much about the industry, and now I can understand the jobs as our clients do. I’ve actually already taken some material home for Rigging 2, and I’ve completed the math exercise! It’s great.”

More questions about training at Hercules? E-mail us at training@herculesslr.com.

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Hercules SLR is part of the Hercules Group of Companies which offers a unique portfolio of businesses nationally with locations from coast to coast. Our companies provide an extensive coverage of products and services that support the success of a wide range of business sectors across Canada including the energy, oil & gas, manufacturing, construction, aerospace, infrastructure, utilities, oil and gas, mining and marine industries.

Hercules Group of Companies is comprised of: Hercules SLRHercules Machining & Millwright ServicesSpartan Industrial MarineStellar Industrial Sales and Wire Rope Atlantic.

 

Rigging Talk – A Guide to Synthetic Slings

Synthetic-Sling-Header

A Guide to Synthetic Slings

Synthetic slings are made from soft materials, but are strong enough to lift heavy loads and protect expensive and sensitive loads from scratches and crushing.

Synthetic slings may well be the answer if you are looking for a less cumbersome lifting sling, which is lighter and easier for your employees to maneuver when rigging a lot? With Synthetic slings there is less chance of marring, scratching, or crushing delicate loads.

A synthetic sling may be the best choice for your overhead lift and can provide the flexibility, strength, and support you need when moving material through your facility or across your job site. However, you’ll have to give special considerations to the operating environment, stretch under load, and the possibility of the load causing cuts or abrasion to the sling.

At Hercules, we custom make and distribute all types of lifting slings, as well as rigging hardware, below-the-hook devices, and other lifting products.

What is a Synthetic Lifting Sling?

If you’re lifting highly easily damaged or delicate materials, then a synthetic lifting sling can provide the flexibility, strength, and support you need to support such a specialized load. Synthetic slings can be made from polyester, nylon, or high-performance materials and are lightweight, easy to rig, and extremely flexible.

Synthetic slings are popular in construction and other general industries because they’re fairly inexpensive, come in a variety of standard sizes, and can be replaced easily.

Yellow nylon soft lifting sling

So what are the advantages of using Synthetic Slings?

Popular in a variety of industries and lifting applications, they are inexpensive, lightweight and extremely flexible. They are able to mold to the shape of delicate and irregularly-shaped loads, or be used in a choker hitch to securely grip loads of round bar stock or tubes.

Synthetic slings are extremely versatile, can be used in vertical, choker, and basket hitches and have a Design Factor of 5:1, meaning the breaking strength of the sling is five times higher than the rated Working Load Limit. Never exceed the rated Working Load Limit.

Made of non-sparking and non-conductive fibers, synthetic slings can be used in even the most unforgiving of atmospheres.

For every positive there is a negative. What are the disadvantages of using Synthetic Slings?

Careful consideration should always be given to the application when determining whether or not to use a synthetic lifting sling. They are more prone to damage from environmental factors like extreme temperatures, prolonged UV exposure, and chemically active environments. They’re also not as durable as steel wire rope slings or alloy chain slings when it comes to abrasion and tears.

Synthetic slings have a relatively low heat-resistance and are not recommended for use in high-heat applications. However, special high-heat resistant slings are available from certain manufacturers.

Nylon and polyester slings have different resistance characteristics to acidic and alkaline environments so special consideration must be made when selecting a synthetic sling to be used in chemical applications. Corner protectors or edge guards should be used to protect against cuts and tears.

If there’s any evidence of heat damage, UV damage, rips, tears, punctures, abrasion, or worn or broken stitching, the sling should be removed from service and properly disposed of to discourage further use.

Polyester vs. Nylon Lifting Slings

When choosing a material for synthetic sling use, we recommend considering a material’s resistance to specific chemicals, temperature resistance, and stretch. Below we’ll provide some of the considerations and characteristics of a polyester slings vs. a nylon sling to help you make more of an informed decision.

Poly sling

Synthetic Polyester Slings

  • Approximately 3% stretch at rated capacity – less bounce allows for more load control during a lift
  • Polyester is a softer material and less abrasive to sensitive or delicate finishes on loads
  • Lower liquid absorption compared to nylon and is non-conductive
  • Resistant to acidic environments and interactions with bleaching agents
  • Great for low headroom elevates
  • More popular in European countries but becoming more popular in the U. T. as the expense of nylon materials continues to rise
  • Not advised for alkaline environments including aldehydes, ethers, and strong alkalis
  • Can’t be used in environments in extra of 194°F or below -40°F

Synthetic Nylon Slings

  • 8-10% stretch at graded capacity – can help reduce shock loading but must be accounted for in low headroom elevates
  • Unaffected by grease and essential oil
  • More popular in the United States and most popular material for general purpose synthetic web slings
  • Resistant to aldehydes, ethers, and strong alkalis
  • Not recommended for acidic environments or for use with bleaching providers
  • Keeps moisture which can also add to or cause stretch under load—however moisture will not influence capacity

Will conduct electricity because they can soak up moisture/water—NEVER gamble your life on this! Can’t be used in environments in extra of 194°F or below -40°F

Synthetic Web Slings

Web slings are toned belt straps made from component material and most commonly feature fittings, or toned or twisted eyes, on each end. Web slings are the most flexible and widely-used multi-purpose sling. They’re strong, easy to rig, and inexpensive. In comparison to chain, they’re more flexible and lighter and can be used to lessen scratching and dents to loads. They can be fabricated with wide load-bearing surfaces up to 48” to provide considerable surface contact for heavy and large loads.

Nylon web sling performance isn’t influenced by oil and oil, and they’re resistant to alkaline-based chemicals. However, they should never be taken in acidic atmospheres or close to chemicals used as whitening agents. Polyester web slings can be used in acidic environments or close to chemicals used as whitening agents, but should never be taken in alkaline conditions.

They likewise have a relatively low heat-resistance and are not to be used in environments that exceed 194°F, or environments where temperature ranges are below -40°F. Regarding loads with sharp sides, corner protectors or advantage guards should be used to protect the sling from cuts and holes. Because there is a difference between abrasion proof protection and cut proof protection, make certain to identify the sort of resistance necessary for your application.

If used outside, they should be stored away in a cool, dark, and dry atmosphere to avoid prolonged direct exposure to sunlight and Ultra violet rays, which can damage and weaken the strength of the sling. Every time a raise is made at the W. L. L., the consumer can expect approximately 8-10% stretch when by using a nylon web sling and 3% stretch when by using a polyester web sling at graded capacity.

Polyester Round Slings

Round Sling

Artificial round slings can include both a single path and multi-path design. The multi-path design can contain top of the line fibers which leads to a lighter, more ergonomic, and tougher sling.

Endless round slings have load-bearing fiber or core yarns that are protected by a individual or double woven external jacket. They are strong, soft and flexible, and protect smooth or refined surfaces from scratches, dings, and crushing.

Round slings can be taken in vertical, container, or choker hitches—which are especially helpful for lifting pipes and pipes. When used in a choker problem, round slings release the choke much easier than a web sling would.

Whilst the woven outer coat has no load-bearing capacity, it is designed to protect the internal load-bearing fibers and core yarns against abrasion, dirt and grease, and UV wreckage. Polyester round slings are well suited for acidic environments, or close to chemicals used as whitening agents, but should not be used in alkaline environments.

Like web slings, round slings are more prone to heat damage and should not be used in environments that exceed 194°F or below -40°F. For loads with sharp edges, corner protectors or edge guards should be used to protect the sling from cuts and tears.

If used outdoors, they should be stored in a cool, dark, and dry environment to avoid prolonged exposure to sunlight and UV rays, which can damage and weaken the strength of the sling. When a lift is made at the W. L. L., the user can expect approximately 3-5% stretch when using a round sling.

Hercules SLR has slings to suit every job. Slingmaster is Hercules SLR’s own brand of sling. Just click here to explore our sling section on our website.

SlingMaster

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Hercules SLR is part of the Hercules Group of Companies which offers a unique portfolio of businesses nationally with locations from coast to coast. Our companies provide an extensive coverage of products and services that support the success of a wide range of business sectors across Canada including the energy, oil & gas, manufacturing, construction, aerospace, infrastructure, utilities, oil and gas, mining and marine industries.

Hercules Group of Companies is comprised of: Hercules SLRHercules Machining & Millwright ServicesSpartan Industrial MarineStellar Industrial Sales and Wire Rope Atlantic.

We have the ability to provide any solution your business or project will need. Call us today for more information. 1-877-461-4876. Don’t forget to follow us onTwitter, LinkedIn and Facebook for more news and upcoming events.