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.

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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.

Get to Know your Trainer – Boris Satiric

trainer boris satiric at hercules slr

Boris Satiric, is one of our highly experienced Training Specialists. We sat down with him to find out more about him and how he decided to choose training as a career path.

Tell us about your background?

Boris: I spent 12 years of dedicated service in the Royal Highland Regiment of Canada – Black Watch, I trained in, and became qualified in several aspects of leadership, operational skills in different environments, and trained with a wide selection of arms and vehicles.

During my time as a faculty member with the Laval University and Polytechnic school as an Electro Technician LEEA Logofor high tension network I developed my technical knowledge and skill set that helped me manage different technical demands within the industry.

During my 12 years with Hercules, I have obtained many additional skills and qualifications which include being LEEA (Lifting Equipment Engineering Association) certified, with experience with Fall Protection equipment and Tower Cranes etc.

What made you decide to enter this industry?

Boris: My decision was based upon my first impressions and experience that I had when I started working for Hercules.  I knew it was a good fit technically for me, and decided to pursue my career within this field, progressing within the company. I like the challenges the job presents, and every day is different.

What made you want to transition into training?

Boris: With experience in leadership and teaching in Canadian forces I decided to use my teaching and technical knowledge to help other people understand the risks of rigging and lifting, and how to deal with those challenges. During site visits to customers, as an inspector I noticed a lack of understanding dangers and that message MUST be passed on to avoid accidents and uphold workplace safety.

boris-get to know your trainer-hercules-slr
Boris inspects tower crane wire 52 stories high

Where have you traveled during your time as a training specialist for Hercules SLR?

Boris: A great deal of the training that I deliver is based in the Western Canada, but Hercules can deliver training anywhere in the country, so I look forward to travelling wherever the job may take me.

Is there anywhere that you would like to travel to in the future with Hercules SLR?

Boris: I would love to travel across the Middle East and South America! Hercules is currently a national company in Canada, however as and when they expand globally, I’d love to go back to Europe, Australia, United States, or Asia.

Lastly, is there anything that you hope to accomplish during your career in the industry?

Boris: I am hoping to get more LEEA (Lifting Equipment Engineering Association) courses under my belt to further my knowledge in the field and further my management potential. My main focus though, is to continue to contribute to today’s safety culture.

Hercules SLR offers a wide array of safety training courses. Alongside our standard courses we can tailor make courses to suit your specific requirements, at our facility or yours. To find out more about our course and how we can help you raise the bar in safety training email us at: training@herculesslr.com

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.

 

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
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Screw pin shackle with cotter/split pin

Dee shackles are mostly used for single-point lifting.

Bow Shackle
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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.

Rigging Services: 3 securing tips to lift you anywhere

rigging-services-hercules-slr

Rigging Services

So you’ve got a difficult load to move – whether it’s due to an awkward shape, uneven weight or hard to determine lift points, Hercules SLR rigging services will lift you where you need to be.

We don’t just sell slings at Hercules SLR – we provide inspections, repairs, training and expert advice to keep your projects safe and efficient.

In addition to calculating the load’s weight, there are a few other tips to planning, rigging and executing a successful lift – read on for tips from our expert riggers to secure your hard-to-manage load and accomplish your next lift with ease.

rigging-services-hercules-slr
Crane lifting electric generator

Rigging Services: 3 tips to move an “awkward” load

One

We can’t stress this enough – inspect your equipment! Says rigger Dwayne Fader, Sales Manager at Hercules SLR “Once the equipment is broken, it’s already too late – maintenance and regular inspection is the key to prevention.”

Check the manufacturer instructions or manual for suggested and required inspection times – Unless you want to damage that expensive part, package or material, which costs WAY more over time than simply investing some time and money into inspections.

An informal inspection should be done before each lift, and official inspections should be done according to manufacturer and/or provincial regulations.  

Two

Bigger isn’t always better. Sometimes, you might look at a large object like a vehicle and just think, “well I’ll grab a bigger shackle or sling.” But you’d be surprised at how much support a smaller sling and/or hardware does have.

“Most people are surprised to learn that a small, 2 1/2″ shackle is strong enough to lift a car – bigger shackles are available, but why go bigger when you don’t need to? Often, the smaller piece of equipment will be safer and better suited to the application as it’s meant to support a specific amount of weight.” says Fader.

Using slings which are too big and create bunching are a safety issue, and so is using a shackle which is too big that a sling may slide around in.

Three

Preventative maintenance is a pain, but important. The longer a piece of equipment isn’t inspected or small repairs are ignored, the worse the outcome typically is. A small build-up of issues can eventually lead to large, more expensive repairs. Neglecting preventative maintenance will increase both cost and the risk of injury or death.

Rigging Services: your reading list

Want more? Find more rigging tips and information on our blog – try these:


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:

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Figure 1: Synthetic Sling Labels

 

Synthetic Slings: eye formations
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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.

Chain Sling Wear and Stretch: Are They the Same?

chain-sling-wear-stretch-difference-Chain Sling Wear and Stretch: Are They the Same?-hercules-slr

Read on to learn the difference between chain sling wear and stretch, from our guest bloggers CM.

Chain Sling Wear & Stretch: what’s the difference?

Frédéric, a mechanical engineer who works for a Canadian public utility company, in the auxiliary equipment department asks CM:

“You said a sling should be removed from service if it stretches. But, you also said that 10% of wear is permissible. Does this mean that a stretch of 5 to 10% should be ok, because wear will make the sling stretch (the reach will increase)?”

Henry Brozyna, CMCO trainer & safety webinar presenter answers:

Chain sling wear and stretch are two different things and both will make the sling length increase. So, it is sometimes difficult to differentiate between the two.

Chain Sling Wear and Stretch: Are They the Same?
Unacceptable Chain Wear

Wear will show itself at the bearing points of the links and can exhibit itself in the bearing points of the chain as a groove. A certain amount of wear is permissible and that will happen over time. Check with the manufacturer to see how much wear they allow.

Stretch or elongation are clear signs of overloading. As such, ASME B30.9 Slings lists stretched chain links or components as one of the reasons a chain sling shall be removed from service. The word “shall” in a standard resolves any doubt.  No stretch or elongation is allowable.

Chain Sling Wear and Stretch: Are They the Same?-hercules-slr
Stretched, elongated chain
CM Chain Sling Inspection Webinar

Read the original article here via CM Works Blog


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.

 

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.

Herc How-To: Assemble a Chain Sling

how-to-assemble-chain-sling

Herc How-To: assemble a chain sling

Chain is often used to tie down loads, for lifting applications and to tow loads – however, the rigging industry’s safety standards have developed in recent years, and chain used for lifting must meet certain specifications. Read on for our tips on how to assemble a chain sling.  

Chain slings are among some of the most popular options for to lift a load – they’re often used to lift spreader beams, for example. Chain slings are durable, ductile, can resist high temperatures, rips & tears and in certain applications, are adjustable – but how do you determine the best chain sling for your project needs?

Herc How-To: two kinds of chain assembly

Two types of chain slings are used to for rigging and lifting applications – mechanical assembly and welded assembly. Chain slings are made with a minimum safety or design factor of 4:1.

The most common chain slings used in rigging and lifting are mechanically assembled since they’re quick to produce and it can be done with basic tools. Chain slings are made by a variety of manufacturers and in many different configurations.

Herc How-To: mechanically assembled chain sling hardware

Construct a basic mechanically assembled chain sling with this hardware:

  • Master Link
  • Mechanical Jointing Device
  • Shortening Clutch (if required)
  • Chain
  • Hook (other fitting as required)
  • Tag

Herc How-To: welded assembly

Welded slings are less commonly used. They take more time to manufacture, since once they’re made they undergo a heat treatment so they’re safe to use in a lifting application. This takes days, versus the minutes it takes to together a mechanically assembled chain sling.

Construct a welded assembly chain sling with this hardware:

  • Master Link
  • Welded Intermediate Link
  • Welded Connecting Link
  • Chain
  • Hook (other fittings if required) ** not pictured
  • Tag

Herc How-To: assemble a chain sling with correct chain grades

The marking grade for chains is recognized by numbers which are found on the chain link. Chain grades for chain sling assembly start at Grade 80 – Grade 80, 100 and 120 are used for lifting applications. However, do not use chain grade marks to determine overhead lifting applications. Do not use grade 30, 40 or 70 chains for overhead lifting.

These grades are used for lifting as they’re ductile and can cope with “shock-loading” that can happen while rigging.

Herc How-To: find the right assembly for you

Follow these steps to assemble the best chain sling for your lifting needs.

  1. Determine the weight of the load to lift, it’s working load limit and any angles that will affect the lift – read our blog on how to calculate load weight for detailed steps.
  2. Head to the dimension/specification chart provided by the chain sling’s manufacturer. Find the chain sling configuration* that will suit your load and lift.
  3. Head to the assembly chart found in the catalogue or website of your respective distributer. Find the Working Load Limit (WLL) to lift at the top of the chart. Find the column that represents size/length, which will be donated in centimetres, inches or millimetres. Be sure to size up. Example: if your load’s WLL is 3,000lbs the chart may give you two options – a WLL of 2,650 and 4,500. Choose the chain length that corresponds with the WLL of 4,500lbs – it’s better to have too much capacity than not enough.
  4. Use the same instructions from Step 3 to choose hardware/fittings from the respective specification chart(s). Example: You’ve chose the DOG sling configuration – this means you must find an oblong shaped masterlink and a grab hook that corresponds to the WLL.
For example: Jim is planning to lift a load with a WLL of 3,000lbs and wants to assemble a chain sling.

Step 1) Jim finds the WLL column of his retailer.

Step 2) Find the WLL – since 3,000lbs isn’t on the chart, we choose the next one up which has a WLL of 4,500lbs.

Step 3) Jim needs chain with 1.79in. length.

how-to-assemble-chain-sling

 
* Chain Sling Configurations

Configurations are denoted by an acronym – the first letter represents the number of sling legs, the second letter represents the fitting at the top of the sling and the third letter represents the bottom fitting. Example: the “O” in DOG represents an “oblong shaped master link”.

Single-Leg 
         
CO Single chain sling with masterlink  
SOS Single chain sling with masterlink and sling hook
SOG Single chain sling with masterlink and grab hook
SOF Single chain sling with masterlink and foundry hook
SSS Single chain sling with sling hook each end 
SGS Single chain sling with grab hook and sling hook
ASOS Adjustable single chain with masterlink and sling hook 
ASOF Adjustable single chain with masterlink and foundry hook 
ASOG Adjustable single chain with masterlink and grab hook 
SOCH Single chain sling with sliding choker   
SOSL Single chain sling with with self locking hooks 
2-Leg
         
DOS Double chain sling with masterlink and sling hook
DOG Double chain sling with masterlink and grab hook
DOF Double chain sling with masterlink and foundry hook
ADOS Adjustable double chain sling with masterlink and sling hook
ADOG Adjustable double chain sling with masterlink and grab hook
DOCH Double chain sling with masterlink and sliding choker 
DOSL Double chain sling with with self locking hooks 
ADOSL Adjustable double chain sling with with self-locking hooks 
3-Leg
         
TOS Triple chain sling with masterlink and sling hook
TOG Triple chain sling with masterlink and grab hook
TOF Triple chain sling with masterlink and foundry hook
TOSL Triple  chain sling with with self locking hooks 
4-Leg
         
QOS Quadruple chain sling with masterlink and sling hook
QOG Quadruple chain sling with masterlink and grab hook
QOF Quadruple chain sling with masterlink and foundry hook
QOSL Quadruple chain sling with self-locking hooks 

 

Hercules SLR – Custom Chain Sling Assembly, Inspections, Repairs and more

We make custom slings to fit your needs, no matter the application. Damage found on chain slings can be inspected, repaired or replaced if needed – e-mail us at info@herculesslr.com to purchase a chain sling, find out more about how to assemble a chain sling or to have a chain sling repaired or inspected. 

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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.

 

Herc How-To: Calculate Load Weight

Herc-How-To-calculate load weight

How-To Calculate Load Weight: the basics

An important aspect of rigging is measurement – there are a number of important things to determine and consider before you calculate load weight and proceed with the lift.

Read on for basic tips from our Hercules SLR experts and learn how to properly calculate a load’s weight.

The lifting equipment used to raise your load should not only support the object’s weight, but it’s volume, height, centre of gravity and any other aspects of the load that could make lifting awkward. Read on to discover the best way to calculate load weight.

Estimation is important—you must be able to accurately guess a load’s weight and centre of gravity. Inaccurate estimations can lead to severe consequences.

Evaluate the load you will lift. Evaluation must include the load’s weight, centre of gravity location, balance, stability and nature should be reasonably determined before you proceed with the lift. NEVER guess the weight of a load.

How-To Calculate Load Weight: method to establish load weight

  • Inspect the load for any identification or mark that indicates weight. If found, check that it’s the weight of the entire load, not just a single component of an assembly;
  • Check supporting documentation or load weight;
  • Check any drawings/diagrams that accompany the load for it’s weight listing;
  • If the load is still on the transport vehicle, determine the load’s weight via a weighbridge;
  • Estimate the load’s weight with available technical data, like tables or weights.

 

How-To Calculate Load Weight: total weight on angular lifts

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How-To Calculate Load Weight: example 1—steel sheet/block

how-to-calculate-load-weight-hercules-slr

Figure 1
  • Calculate the weight of a steel plate (shown in figure 1) 2ft wide X 5ftlong X 1inch (0.0833ft) thick.
  • Use the formula:
  • Volume = Length X Width X Height
  • Unit weight of steel is 490 lbs/ft³ 
  • Volume = 5ft X 2ft X 0.0833ft X 490 lbs/ft³
  • Weight = 408.3 lbs

 

How-To Calculate Load Weight: calculate force in slings

It’s important to understand the different angles that will impact the load to lift. The included angle is the angle created between opposite sling legs (ex. 0-90°). Using the included angle is known as the Trigonometric rating.

The vertical angle is the angle created by one sling leg from the vertical (ex. 0-45°). This is called the Uniform Method of rating. All new slings must use this method.

The horizontal sling angle is the angle that forms between the sling leg and surface of the load.

how-to-calculate-load-weight
Figure 2
Determine Vertical Share

When the centre of gravity is equal between pick points, the sling and fittings will carry an equal share of the load.

Centre of Gravity and Sling Loading
how-to-calculate-load-weight
Figure 3

When the centre of gravity isn’t equal between pick points, the sling and fittings won’t carry an equal share of the load.

The sling attached to the closest to the centre of gravity will carry the greatest share of the load.

In this example, Sling B will be carrying more than Sling A.

As you can see from the image, ‘Sling B’ carries more weight than ‘Sling A’.

 

 

 

 

 

How-To Calculate Load Weight: additional loading

Before you rig a load to lift, consider these factors that may affect the load, in addition to its weight:

  • Wind blowing against the load;
  • Shock loading;
  • Additional below-the-hook lifting devices;
  • Loads frozen to the ground;
  • Loads snagging;
  • Water, snow or ice accumulation on load;
  • Dynamic side-to-side movements;
  • Extreme temperatures.

HERC HOW-TO BLOGS

Herc How-To: Assemble a Chain Sling 

Herc How-To: Avoid These Common Rigging Mistakes 

Shackles: A Hercules Hardware How-To 


Need a lift? Call Hercules SLR

Have a heavy object that needs a lift? Don’t want to do all of this math on your own? We understand.

Hercules SLR creates custom rigging solutions for our clients’ specific needs (check out this custom sling we made for the Town of Oakville Marina!) and the service doesn’t end there—We provide inspections, repairs and service for:

  • Wire Rope
  • Fall Protection
  • Lifting Equipment/Gear
  • Rigging Hardware
  • Hoists & Cranes
  • Winches & Hydraulics

Don’t see your gear on the list or have more questions? Give us a call and our experts will match you with the right service or product for your needs.

Interested in learning more? We offer training courses at the Hercules Training Academy for these, and more:

  • Chain Saw Safety
  • Confined Space Entrant & Attendant
  • Fundamentals of Rigging (With Practical)
  • Fundamentals of Overhead Cranes
  • Offshore Rigger Banksman

Drop a line at info@herculesslr.com or training@herculesslr.com for more information on inspections, repairs or to sign-up for a training course.


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.