Northern Strands is able to offer a large variety of products for tow trucks. Between our five divisions, we can equip tow truck operators with numerous products to help get the job done.
We offer wire rope as well as Dyneema rope cut to customized lengths for tow truck drivers. Dyneema rope is a synthetic rope that has a comparable breaking strength to that of wire rope. This synthetic rope won't kink, curl, or splinter and has minimal stretch with no rotation.
Northern Strands can also provide tow truck operators with different configurations of Grade 70 Transport Chain. This chain is high tensile carbon steel, heat treated, and is available in custom lengths. We also offer Grade 70 Grab and Slip Hooks along with Ratchet and Lever Style Load Binders.
Northern Strands offers a numerous Crosby Rigging products to our customers. Crosby Swivel Hoist Rings have a variety of applications and are used similarly to shoulder eye bolts to help with connecting hooks and chains. Swivel Hoist Rings are rated at 100% at a 90° angle.
The Crosby UNC Swivel Hoist Rings are individually tested 2-2/5 times the recommended Working Load Limit. This ensures that the product will perform properly within the specified working load limit.
Northern Strands also supplies Crosby Metric Swivel Hoist Rings. This Swivel Hoist Ring washer is color coded for easy identification (silver & metric thread).
Crosby's Heavy Lift Swivel Hoist Rings have increased durability and can be used in less than ideal field conditions. The Heavy Lift Swivel Hoist Ring also has a larger opening than the standard Hoist Ring.
The Cold-Tuff UNC Heavy Lift Swivel Hoist Rings are produced with maximum hardness of 34 HRc. The body, brushing, washer, and bail have impact requirements of 31 ft-lbs minimum average at -4. The bolt has impact requirements of 20 ft-lbs with a minimum average at -150°F.
Stainless Steel Swivel Hoist Rings by Crosby are available at Northern Strands as well. All components are 316 stainless steel, execpt the bolt retainers that are made from 15-7 PH magnetic stainless steel. The Available capacities range from 400 lbs to 50,000 lbs. The Stainless Steel Swivel Hoist Ring is rated at 100% at a 90° angle.
It is important to use Swivel Hoists properly to ensure that work is completed safely. Never exceed the working load limit of a swivel hoist ring. Northern Stands offers a free sling calculator that can be used to calculate the necessary angles when using a swivel hoist and a sling. The Northern Strands Sling Calculator can be found here: Sling Calculator
For additional information on Swivel Hoists or the other Crosby products offered at Northern Strands, please contact us!
Northern Strands, safety is one of our top priorities. Therefore, knowing how to properly clip wire rope using Crosby clips is very important in order to practice safe rigging. Keep in mind that the wire rope clip must be the correct size for the diameter of the rope that is being used and that there is a specific number of clips that are required according to rope size.
A quick rule of thumb for proper clip installation is, "Never Saddle a Dead Horse". This refers to the live end of the wire rope that rests in the saddle of the forged wire clip and the U-bolt that is placed on the dead end of the wire rope.
Here is the proper way to install Rope Clips as illustrated by the Crosby Group's 2015 General Catalog:
1. Turn back specified amount
of rope from thimble or loop. Apply first clip one base width from
dead end of rope. Apply U-Bolt over dead end of wire rope – live
end rests in saddle (Never saddle a dead horse!). Use torque
wrench to tighten nuts evenly, alternate from one nut to the other
until reaching the recommended torque.
2. When two clips are
required, apply the second
clip as near the loop or
thimble as possible. Use torque wrench to tighten nuts evenly,
alternating until reaching the recommended torque. When more
than two clips are required, apply the second clip as near the loop
or thimble as possible, turn nuts on second clip firmly, but do not
3. When three or more clips are required, space additional clips
equally between first two
– take up rope slack – use
torque wrench to tighten nuts on each clip evenly, alternating from one nut to the other until
reaching recommended torque.
4. If a pulley (sheave) is
used in place of a thimble,
add one additional
Fist Grip. Fist Grip
spacing should be
For more information on wire rope and wire rope clip installation, please contact us!
There are a number of important factors to consider when using chain to lift a given obstacle. Shiny, gold, Grade 70 Transport chain is intended for load binding only. This chain is used to hold heavy items down to a flatbed truck and the gold-chromate finish as well as the carbon-steel construction makes this chain easy to spot and more difficult to break.
With this said, this chain should not be used for lifting unless it has been fabricated by a sling manufacturer and the manufacturer is required to follow guidelines for fabrication. ASME and/or ASTM standards must be followed and they require that either grade 80 or 100 chain be used in sling fabrication, due to the alloy steel construction and its ability to elongate when overloaded as opposed to snapping suddenly. The manufacturer will also have to put a tag on the chain sling that indicates what maximum load or Working Load Limit can be safely applied to the sling, making it easier for end users to know the limitations.
When lifting any objects off of the ground, the weight of said object as well as the capacities of the lifting device and rigging must all be known before making the lift. This important guideline is something that the Northern Strands' Training Division focus on in the Below the Hook Rigging training. Sections 208 and 209 of the Saskatchewan’s Occupational Health and Safety Regulations refer to this concept directly as well.
When in doubt about whether to lift a load with a certain chain or not ask yourself this question: Does the chain have a tag on it indicating its Working Load Limit?
If yes – there are a number of other questions you should ask yourself after this to determine that all of the parameters related to the lift are safe.
If no – do not attempt the lift and look for an alternative solution.
Why does rigging need a safety factor?
When performing any sort of lift whatsoever, it is important that workers are trained in safe rigging practices and that they are competently supervised. Whether you are an employee or an employer, feel free to contact Northern Strands about our various Safety Courses and our Below the Hook Rigging Seminars.
For more information about Below the Hook Rigging Seminars click here: Hook Rigging Seminars
For more information about all Safety Training Courses click here: Safety Training Courses
Northern Strands Training Division Contact Information
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:
- Shock Loading - Unexpected drops where the load can accelerate and then must be 'caught' by the slings.
- 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.
- 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 email@example.com
Northern Strands is proudly Saskatoon, Saskatchewan owned and operated.