Northern Strands
Northern Strands Latest News

Latest News

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.

What are the Manufacturing Capabilites of the Northern Strands Rigging Warehouse?

Did you know that Northern Strands is the largest manufacture of rigging products in Saskatchewan?  Our Rigging Warehouse has the ability to manufacture many different types of custom wire rope and rigging products.

Here is a list of custom wire rope and rigging products our warehouse can manufacture:

  • Spreader beams
  • Lifting beams
  • Material baskets
  • Wire rope slings
  • Man baskets
  • Overhead lifting chain slings
  • Transport chain assemblies
  • Jib cranes
  • Gantry cranes
  • D-plates
  • Synthetic tow cables
  • Wire rope and synthetic winch lines
  • Double braid tow rope
  • Double braid nylon and polyester tow ropes
  • 8 strand platted superdan tow ropes
  • Polysteel fall protection lifelines
  • Fall protection anchor slings
  • Flemish eye wire rope slings
  • Thimble eye wire rope slings
  • Resin poured spelter sockets
  • Four legged wire rope slings
  • Three legged wire rope slings
  • Two legged wire rope slings
  • Multi legged wire rope slings
  • Harrow cable assemblies
  • Tow cables for tractors
  • Draw bar assemblies
  • Custom threaded studs
  • Rail car puller wire rope
  • Miscellaneous wire rope assemblies
  • Overhead alloy chain assemblies
  • Grade 100 overhead lifting chain assemblies
  • Galvanized stainless steel wire rope assemblies
  • Logging chokers
  • Swagged sockets

We also fabricate custom lifting devices for mining, construction, agriculture industries. 

Here are some examples of custom lifting devices we've produced:

  • Custom plate lifters
  • Coil lifters

Examples of products we've fabricated lifting devices for:

  • Concrete blocks
  • Secan containers

All of Northern Strands rigging products come with a certificate of compliance.

Northern Strands rigging division has technically trained sales staff that can assist you with the development of rigging and lifting plans.   

Contact us today for a quote on your next custom wire rope or rigging product.  Phone 306-242-7073,  email sales@northernstrands.com or visit our website http://www.northernstrands.com/wire-rope-rigging.aspx

 

Did you know Northern Strands has been locally owned and operated for over 45 years?

Northern Strands Launches Saskatchewan's First Hydraulic Bridge Platform

Northern Strands is excited to announce the launch of Saskatchewan’s first Hydraulic Bridge Platform, the Hydra Platform HP 32! This specialized piece of bridge construction equipment has the potential to greatly reduce inspection, maintenance and repair down time of bridges throughout Saskatchewan.  Likely reducing bridge traffic lane down time.  This is very significant, in that bridge and road construction delays are always an area of concern for Saskatchewan residents. Not only will the Hydra Platform reduce down time, it was also designed with worker safety in mind. As opposed to traditional bridge inspection and repair methods used in North America, not a single worker death has occurred while using the Hydra Platform HP 32.

 The official launch took place last Friday at 1pm on Highways 16 and 11 overpass in the south end of Saskatoon.  A press release was sent out to media, municipalities and companies that would benefit from the usage of an under bridge access platform.  In attendance were construction companies, government officials and the media.  

We were very pleased that the Mayor of Saskatoon, Donald Atchison attended the launch of the Hydra Platform HP 32 and showed his support for a local company investing in Saskatchewan worker safety. 

CTV covered the launch of the under bridge aerial access platform, with it airing the same day on the 6pm news!  CTV does not have the link to Friday's news broadcast on their website for us to post.  However, we are still trying to procure the original broadcast footage and will hopefully have it to post in the future.  It was an excellent piece, with the opening line being, "A local company, Northern Strands is investing in Saskatchewan worker safety!"   

Below are a handful of pictures from the launch of Saskatchewan's first hydraulic bridge access platform:

Northern Strands Suspended Access Division employee Jason Okotinsky explaining the benefits of using the Hydra Platform.

 

 The Hydra Platform starting it's deployment over the edge of the overpass.

 

 The Hydra Platform arm extending away from tower

 

 Northern Strands Health and Safety Manager Terry Zerbin being interviewed by media.

 

 Mayor of Saskatoon, Donald Atchison discussing the Hydra Platform with Northern Strands employees.

 

Mayor Donald Atchison volunteers to take part in the Hydra Platform demonstration and climbs down the tower to take in the view from the platform arm.

We would like to thank all who attended, helped and participated in this important Northern Strands event.

Please see the link below to our brochure to learn more about how your company can benefit from renting the Hydra Platform HP 32:  

Northern Strands Hydra Platform HP 32 Brochure.pdf (1.10 mb)

 Or visit Northern Strands Suspended Access Systems webpage for more information: http://www.northernstrands.com/suspended-access-systems.aspx

Should Outrigger Tiebacks for Powered Suspended Access Equipment Be Wire Rope?

In the industry there is a misconception that portable outrigger beams and parapet clamps being used with powered suspended access equipment can be tied back using fibre rope, and often times it is old vertical lifeline rope that is used for this application.  However, using rope in this application is an incorrect practice.


Under the national CSA Safety Code For Suspended Platforms, the tieback cables for portable outriggers and parapet clamps must be of equal strength as the primary suspension rope.  Since most powered climbers use a 5/16” or 8.4mm diameter wire rope that has a breaking strength of 10,000+lbs, the use of 5/8” polysteel lifeline (which has a breaking strength of only 9,000 lbs when new) is not adequate.  In addition to that, ropes are usually terminated at the anchors with knots, and ANY knot will reduce the strength of rope by at least 25%.  While ropes of the proper strength and construction (and when terminated with the proper approved knots) can be used with rope access systems and manual bosun’s chairs, they should never be used with any powered suspended equipment that has wire rope as the primary suspension line.


At Northern Strands, we will always supply the proper tieback cables and wire rope clips for this connection, and provide complete instruction on proper rigging of tieback cables as part of our Suspended Access Equipment Training course.

The picture below shows an example of a correct outrigger tieback with wire rope

For more information visit http://www.northernstrands.com/suspended-access-systems.aspx

"Northern Strands is proudly Saskatoon, Saskatchewan owned and operated."

Themes

Previous Posts

Saskatoon (Head Office)

  • 3235 Millar Avenue
  • Saskatoon, SK S7K 5Y3

Regina

  • 125 Henderson Drive
  • Regina, SK S4N 5W4
Follow us on Facebook Find us on Twitter Google+ Linked In RSS Feed