Northern Strands
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Do You Make This Common Synthetic Sling Inspection Mistake?

When conducting work site inspections, audits, or periodic rigging inspections, it is not uncommon to have to take anywhere from 80% -100% of the synthetic web slings out of service. There are a large variety of reasons a synthetic sling, “gets itself” into such a state of disrepair, but one thing that comes up from time to time when you ask a sling’s user why it is still on the rack in a clearly damaged state, a typical response might be:

“Oh, well you can’t see the red marker threads, so I thought they were still good…?”

Unbeknownst to some, many synthetic slings can be cut completely in twain and there will be no evidence of the aforementioned “red marker threads” whatsoever.

Backstory: some sling manufacturers would weave a different colored thread into the web sling material as a way to warn users of excess wear/abrasion/etc. The idea was that sling users would be able to more quickly identify a worn out sling by seeing the different colored thread.

So now we can see the issue that I have with this: the manufacturers added a feature to help sling users identify worn web slings and then sling users eventually turned it into a Go/No-Go gauge. This is made even worse by the fact that many, many slings do not have red marker threads of any kind. And even when slings do have them there can be many other reasons to take a synthetic sling out of service before they become visible.

If you’re noticing a trend like this on your worksite inspections follow this link http://www.northernstrands.com/training.aspx and we can discuss how the Northern Strands Below the Hook Rigging Training program could help you and/or your workforce learn where to draw the line and take slings and other rigging out of service before they become a hazard.


Why Does Rigging Need a Safety Factor

Why does rigging need a safety factor?

Have you wondered why rigging experts always suggest a sling that has a significantly higher breaking strength than the actual weight of the load you are lifting? The manufacturers know that the rigging used in overhead applications need to have room for error. This is known as the Safety Factor.

Northern Strands manufactures wire rope slings rated up to 36,000 lbs and sells round synthetic slings that are rated up to 140,000 lb capacity. This capacity is the Working Load Limit of the sling, which is the maximum amount of weight or force that the sling's user is allowed to put on the sling. Note: These slings do not break at the working load limit. These slings are designed with a safety factor of 5:1. This means that 5 times as much force as the working load limit has to be applied to the sling before it potentially fails. This means the wire rope slings have a Breaking Strength of up to 180,000 lbs and the round synthetic slings can withhold up to 700,000 lbs.

Why are these capacities reduced by such a drastic degree?

Among others, here are 3 good reasons:

  1. Shock Loading - Unexpected drops where the load can accelerate and then must be 'caught' by the slings.
  2. Wear - Working load limits are based on slings in brand new condition and a safety factor can help account for normal wear and tear until it is deemed unfit for further use.
  3. Uneven loading - Slings are made up of either wires or fibers that must all share the weight of the load evenly. If any situation arises where the sling is bent or wrapped around an object, there is potential that some of the wires or fibers will be taking on a greater share of the load than others.

Visit Northern Strands website to use the sling tension calculator. The Northern Strands Sling Calculator has been designed to assist you in selecting slings with enough load carrying capacity for your lifting applications. It is your responsibility to assure that the slings you use are appropriate for your application.  http://www.northernstrands.com/sling-calculator.aspx

To inquire about Rigging and Safety Factors, contact:

Northern Strands @ 306-242-7073

or Email info@northernstrands.com


Northern Strands is proudly Saskatoon, Saskatchewan owned and operated.

Northern Strands to Host Crosby Shrimp Boil and Rigging Training Event!

This year Crosby Group has selected Northern Strands to host its famous Crosby Shrimp Boil and Rigging Training Seminar!  For those unfamiliar with this event, Crosby Group provides a free rigging course followed by a shrimp boil where you eat jumbo prawns to your hearts content.  Plus Northern Strands will be providing pull testing demonstrations on our mobile test bed and offering tours of our rigging warehouse facilities.  Crosby selects only one Canadian Crosby rigging distributor annually to host this exclusive event.  With Northern Strands being one of the top rigging companies in Saskatchewan, it was high time the Crosby Shrimp Boil made it's way back to Saskatchewan.  In fact, this isn't the first time Northern Strands has hosted the Crosby Shrimp Boil.   In years past, our Regina location hosted the event to great success.

The Northern Strands Shrimp Boil and Rigging Training event will take place Wednesday June 1st.  If you are a company that uses rigging and would like your employees to receive free rigging training followed by a free shrimp boil, contact us today to see if we still have spots available.  See the attached invitation for details...We have extended the RSVP date to May 20th.  Email marketing@northernstrands.com if you are interested in attending.

Northern Strands Crosby Shrimp Boil Invite.pdf (827.73 kb)

Did you know that Northern Strands is the largest supplier of supplier of rigging and wire rope in Saskatchewan?  We supply many of the local farmers, construction companies and potash mines in Saskatchewan with the following rigging supplies:

  • Crosby shackles
  • web slings
  • round slings
  • chain slings
  • wire rope slings with special fitting (threaded studs, spelter sockets, swage sockets)
  • turnbuckles
  • wirelock
  • spreader beams
  • chain hoists
  • lever hoists
  • aircraft cable
  • plate clamps
  • beam clamps
  • tow straps
  • tow rope
  • snatch blocks
  • transport chain
  • fall protection gear
  • lifting hooks
  • trifors
  • grade 100 chain
  • lifting lugs
  • eyebolts & eye nuts
  • wire rope lubricant
  • grade 100 chain
  • grade 30 and 43 Chain

And of course all Crosby Rigging products!

Northern Strands is proudly Saskatoon, Saskatchewan owned and operated.

Need a Sling Ratings Chart?

Being a company that specializes in rigging, we are often asked for working load limits for wire rope slings, synthetic slings, chain slings and polyester round slings.   We have attached a Sling Ratings Chart for the convenience of our valued customers.

Sling Ratings Chart.pdf (324.61 kb)

Trivia:  Did you know that Northern Strands is the largest supplier of wire rope and rigging in Saskatchewan?

 

Northern Strands is proudly Saskatoon, Saskatchewan owned and operated.

 

Do You Need a Commercial Roofing Fall Protection Plan?

Over the last few decades worker safety in Canada has become an area of utmost importance for our government, companies and workers.   Worker fall protection safety has been a particular area of focus in safety regulations and culture across Saskatchewan and Canada

Did you know that Saskatchewan's Occupational Health and Safety Regulations states that, "An employer or contractor shall develop a written fall protection plan where:
(a) a worker may fall three metres or more; and
(b) workers are not protected by a guardrail or similar barrier."?

What constitutes a fall protection plan or system?  OH&S regulations state, "The fall protection plan required by subsection (1) must describe:
(a) the fall hazards at the worksite;
(b) the fall protection system to be used at the worksite;
(c) the procedures used to assemble, maintain, inspect, use and disassemble the fall protection system; and
(d) the rescue procedures to be used if a worker falls, is suspended by a personal fall arrest system or safety net and needs to be rescued.
(3) The employer or contractor shall ensure that a copy of the fall protection plan is readily available before work begins at a worksite where a risk of falling exists.
(4) The employer or contractor shall ensure that a worker is trained in the fall protection plan and the safe use of the fall protection system before allowing the worker to work in an area where a fall protection system must be used."

Northern Strands Engineered Fall Protection Division recently completed a job where we installed an Engineered Fall Protection System for a commercial rooftop.  We completed the installation of two force management anchors on a standing seam roof.  Standing seam clamps are attached to the roof top. Bearer bars bridge the gap between two standing seams.  Anchor plates are the riveted to the bearer bars and the pull tested. Finally the anchors are assembled on the anchor plate and torqued.  These rooftop anchors are now ready for the customers use.

If you have questions regarding commercial rooftop fall protection plans, please contact the Engineered Fall Protection Division of Northern Strands at 306.242.7073, email lifelines@northernstrands.com or visit our webpage http://www.northernstrands.com/fall-protection.aspx

Northern Strands is COR safety certified and is a Mission Zero Charter Member

We are proudly Saskatoon, Saskatchewan owned and operated.

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Saskatoon (Head Office)

  • 3235 Millar Avenue
  • Saskatoon, SK S7K 5Y3

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  • 125 Henderson Drive
  • Regina, SK S4N 5W4
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