The strongest ratchet strap is not simply the one with the largest number on the package. The rating that matters for choosing a strap is its Safe Work Load (which is also known as Working Load Limit), along with the strap’s webbing and construction.
Most people shopping for ratchet straps do the same thing: scan the packaging, spot the biggest number, and assume that is the strap’s real capacity. Often, that number is the breaking strength, and that is where the confusion starts. Breaking strength describes a different limit and should not be treated as the strap’s usable working capacity.
Safe Work Load (SWL) in the US and Canada, is defined as 1/3 of the breaking strength and is the primary consideration when hauling dynamic loads. Dynamic loads are any loads that move. Movement creates additional force that must be safely resisted.
For example, if you’re hauling a motorcycle that is strapped down in the bed of your truck and you drive over a pothole, the SWL accounts for any potential shifts and position changes of your load. Dynamic loads place more force on an object than just gravity, which is the reason for a safe work load limit and not just a breaking strength.
SmartStraps has spent more than 20 years focused on cargo securing, and understanding the difference between Breaking Strength and Safe Work Load is one of the most important steps in choosing the right tie down. Here is how to read the ratings that actually matter.
What Is the Difference Between Breaking Strength and Safe Work Load?
Breaking Strength and Safe Work Load (also sometimes referred to as Working Load Limit) describe different things. Breaking Strength relates to the force at which the product or system is tested to failure, while Safe Work Load is the rated capacity used to determine whether a tie down is appropriate for a working application.
|
RATING |
WHAT IT TELLS YOU |
HOW TO USE IT |
|
Breaking Strength |
Failure/testing threshold. |
Do not treat it as a usable working capacity. |
|
Safe Work Load (SWL) |
Rated working capacity. |
Use the approved SWL guidance when selecting a tie down for the application. |
Where Do You Find the SWL on a Ratchet Strap?
The rating information should be identified on the specific SmartStraps product label, packaging, or product. Before using a strap, check the product’s current label and instructions rather than relying on a number remembered from another strap or duty class.
On SmartStraps products, you can find the SWL on its sewn-in warning tag.
What Makes a Ratchet Strap Strong Beyond the Rating?
The printed SWL rating is essential and should always be the primary factor you consider when selecting a suitable and safe tie down. Beyond this, quality matters and SmartStraps has been making innovative tie downs for more than 20 years, with more patented products than any other company in the market.
Webbing Material and Construction
SmartStraps tie downs are constructed from high-quality polyester, with the width and density determined from anticipated ratchet capacity.
Review the warning tag label on your product for specific information regarding the environmental considerations of your product’s materials.
Hardware Quality
Hardware on SmartStraps products is designed to surpass the strength of the webbing. The webbing is rated at the break strength. Ratchet hardware has a minimum design factor of 3:1, meaning it has sufficient strength to sustain a proof load test of 1.5 times the SWL without causing any permanent deformation.
Select SmartStraps products, such as our Ratchet X line of tie downs, have cast aluminum rails that are corrosion resistant. Several of our products, such as our tactical ratchet tie downs, have Zerust® bushings that prevent rust and eliminate metal-on-metal contact, as well as multi-tooth precision gearing and a quiet ratcheting system. These are examples of innovations aimed to improve longevity and set our products apart from comparable options in the market.
Consistent Manufacturing and Quality
Two products can look similar on a shelf while differing in materials, hardware, construction, inspection, and manufacturing consistency.
All SmartStraps products pass industry standard hardline tests for quality control. Our products are approved and sold by trusted retailers like Advance Auto Parts, Amazon, AutoZone, Keystone Automotive Operations Inc., Lowe’s, Menards, Northern Tool + Equipment, The Home Depot, Tractor Supply Co., and Walmart.
How Do You Match a Ratchet Strap Rating to Your Load?
Assess the weight and type of load you are securing and select the appropriate tie down based on the product’s specific Safe Work Load, hardware, and length.
Do not select a strap by Breaking Strength alone.
For example, if you know the weight, length, and shape of the load you are securing, you’ll want to select a suitable ratchet strap(s) that has a long enough strap length and at least the same Safe Work Load.
For SmartStraps products, our duty-class ratings are as follows:
- Standard Duty = 500 lb. SWL
- Heavy Duty = 1,000 lb. SWL
- Commercial Duty = 1,667 lb. SWL
Be sure to check the product’s warning tag label for the specific Safe Work Load.
Also be sure to check out: How to Use Ratchet Straps Correctly: The Complete Guide
What Are Common Mistakes When Comparing Ratchet Strap Strength?
- Shopping by Breaking Strength instead of understanding the product’s SWL.
- Assuming two straps with similar-looking webbing or hardware have the same rating or construction.
- Assuming a duty-class name automatically tells you the rating without checking the specific product (Commercial Duty products can be rated for different weights, starting at 5,000 lb. breaking strength, for example).
- Ignoring the condition of the webbing, hardware, stitching, or label.
- Using damaged equipment. Examples of damaged web tie downs can be viewed here.
Frequently Asked Questions About Ratchet Strap Strength
What is Safe Work Load (SWL)?
Safe Work Load is the rated capacity used when determining whether a tie down is appropriate for an application. It is the weight the object you’re securing can be tied down with a specific strap. Your SWL should always be greater than what you are loading.
Is SWL the same as Breaking Strength?
No. They describe different limits. Breaking Strength should not be treated as the usable working capacity of a tie down.
Where is the SWL printed on a ratchet strap?
Check the label, packaging, or instructions for the specific product. On SmartStraps products, the SWL is included on both the packaging and on the sewn-in tag on the product.
Does a higher Breaking Strength always mean a better ratchet strap?
A higher breaking strength means that a strap is stronger, but not necessarily “better” for an intended application. Stronger straps have the potential to damage something not intended for a higher weight class. The best ratchet strap for your situation is dependent on what you are hauling. Select a ratchet strap that is optimal for your load type based on its weight, shape, and length.
How do I choose the right SWL for my load?
Match the tie down and securing setup to the actual load using the specific product’s SWL. You can select your strap based on break strength, but you must ensure that what you are loading is under SWL.
The Bottom Line
Start with Safe Work Load, then consider the specific condition, configuration, and suitability for the job. Understanding what the ratings actually mean makes it easier to choose the best tie down for your job with confidence.
SmartStraps has more than 20 years of cargo-securing and manufacturing experience. The next step is to match that expertise to the load in front of you using the correct product rating and approved securing guidance.