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Matt Florjancic

“The safety of the people shall be the highest law.” – Roman statesman Marcus Tullius Cicero

In the lifting and rigging industry, safety is critical. It’s not just to get work done efficiently, but also, to make sure your workers are safe at all times. Safety comes through education, and knowing the weight of your lifts is critical to making efficient AND safe lifts.

The Crosby Group has the mission to find safer ways to conduct overhead lifts through technology. The Crosby Wireless Load Shackle is one of the load-monitoring devices that will help you know how much you’re lifting and how sling angles affect the weight of the load.

As part of the Crosby | Straightpoint line of products, the wireless load shackle was designed to help determine load weights. While the wireless load shackle has a lower accuracy rate than other Straightpoint products, it works well in low-headroom environments.

In this article, we’ll answer the following questions:

  • What is the wireless load shackle?
  • How do you monitor the results from the wireless load shackle?
  • What are the key specifications of the wireless load shackle?
  • Where has the wireless load shackle been used in the field?

What Is the Crosby Wireless Load Shackle?

Crosby Straightpoint Wireless Load Shackle Rigged to a Master Link with Mazzella Roundslings

The wireless load shackle utilizes Crosby G2130 and G2140 bolt-type shackles to monitor loads for an efficient solution.

Low-headroom applications, permanent installations, and heavy lifts are areas where a wireless load shackle makes sense to use. Crosby | Straightpoint makes the wireless load shackles in varying capacities up to 1,500 metric tons.


Say you have a 400-ton Radiolink Plus load cell with a 400-ton shackle on top, and a 400-ton shackle on the bottom. It requires so much headroom and is so heavy with all those components together that it decreases the ease of use.


You could use the wireless load shackle at 400 tons, connect it to your rigging and hook, and monitor your lift.

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How Do You Monitor the Results from the Crosby Wireless Load Shackle?

Crosby Straightpoint Wireless Load Shackle Being Monitored on Different Devices

The wireless load shackle offers either a long-distance Radio Frequency (RF) version monitored on a handheld device with Crosby | Straightpoint’s Insight software (designed for Windows-based devices), or a Bluetooth version monitored with its free app. The HHP app is available on Android or iOS platforms.

The Bluetooth version of the wireless load shackle has a communication range of about 100m or 328’. However, the presence of other frequency devices in range of the load cell (including, but not limited to, wireless crane controls), can weaken or easily disrupt the signal.

You can monitor the long-distance RF version of the wireless load shackles from the handheld device, which can display up to four devices at one time. If you have a four-point lift, and you need four wireless load shackles, you only need the one handheld device (or Insight software) to see the individual loads or access another screen that gives you the total weight of the load.

Following the power-on, the handheld device will connect to the wireless load shackles. If there is only one load cell, it will display the reading in a single-screen mode. As the weight of the load increases, the amount on the display will increase. If an overload occurs, the handheld will display “OVERLOAD,” and a 90db alarm on the handheld device will sound.

In addition to the weight, the Crosby | Straightpoint handheld device will monitor each shackle’s signal strength and ID.

What Are the Key Specifications of the Crosby Wireless Load Shackle?

Crosby Straightpoint Wireless Load Shackle Front and Back Waiting to be Rigged


It depends on the type of wireless load shackle you use. If it has a radio frequency, it can cover up to 1,000m (3,280’). If the wireless load shackle has Bluetooth capabilities, it will cover 100m or 328’.


The smallest of the 10 wireless load shackles weighs 6.16 lbs. (2.8 kg). The heaviest wireless load shackle weigh 1,459 lbs. (662 kg).


The smallest wireless load shackle (WLS3.25T) can hold 7,150 lbs. (3.25 metric tons). The heaviest wireless load shackle (WLS400T) can lift loads up to 880,000 lbs. (400 metric tons).

Battery Type / Life

The wireless load shackle requires 4 AA alkaline batteries to function. The batteries can last up to 1,200 hours of continuous use, or 500 hours in Bluetooth functions.

Display Type

Like the Radiolink Plus, certain Crosby Wireless Load Shackles come with a 240×128 multi-line dot matrix with backlight. If used with Bluetooth, the wireless load shackle sends results to your smartphone.

Operating Temperature

The wireless load shackles can operate between 14°F and 122°F (-10°C to +50°C).


Across all 10 models, the wireless load shackles have an accuracy of +/- 1.0% full scale.


The wireless load shackles have a 2.4 GHz frequency.

Data Rate

These load shackles have a data rate of three updates per second.


The wireless load shackles are IP67 rated. They are dust tight and watertight against water immersion between 15cm and 1m for 30 minutes. Additionally, the wireless load shackles are NEMA6 rated, meaning they have the highest level of protection against dust and water intrusion. Also, they are resistant to corrosion.

Where Has the Crosby Wireless Load Shackle Been Used in the Field?

Crosby Straightpoint Wireless Load Shackle Being Used on an Overhead Crane in the Field for a Lift

The wireless load shackles have been used in a variety of environments. Some of those uses include, but are not limited to:

  • Logging industry
  • Overhead cranes
  • Auto cranes

Logging Industry

Loggers came to Crosby | Straightpoint and wanted to use the wireless load shackle. They did so to monitor weights when pulling logs up the sides of mountains.

Overhead Cranes

Typically, in a warehouse, headroom can be an issue during a lift. There are thousands of overhead cranes in the United States with no or limited load monitoring. The wireless load shackle is a hook, and Crosby | Straightpoint offers an LED display that’ll show the weight.

They’re four-inch tall letters, so you can clearly see how much you’re lifting.

Auto Cranes

Here, load cells have been used to make sure lifting specialists don’t overload the pedestal crane.

If you’re lifting a load, and you don’t know how much it weighs, that’s a perfect application for a load cell. There’s a multitude of opportunities to rig loads safer than they are right now simply by knowing how much you’re lifting.

What Are the Limitations of the Crosby Wireless Load Shackle?

Crosby | Straightpoint’s Wireless Load Shackles are designed to operate between 14°F (-10°C) and 122°F (50°C).

If you’re making a lift in sub-zero temperatures, it’s probably not a fit for Crosby | Straightpoint’s Wireless Load Shackles.

Conversely, in hot forge foundries, customers will put a load cell on a crane that’s getting up to 150°F, and others have said, “It’ll flash a temperature of 250°F.” Crosby | Straightpoint doesn’t have an effective solution for something that hot.

Crosby | Straightpoint does make custom project load-monitoring solutions, so special applications can be reviewed for capabilities.

If you work in a hazardous environment where you’re using spark-resistant cranes and hoists and explosion-proof equipment, Crosby | Straightpoint has an ATEX (Atmosphere Explosible)-rated load cell that can be used in those hazardous environments. The specialized load cell must be marked by ATEX and has to be ATEX-approved.

***Remember to have conversations with your rigging specialists and reach out to manufacturers to understand what you’re getting into because the equipment / tools business is not a “one-size-fits-all, out-of-the-box” application. Do your research on what you’re about to rig BEFORE you rig it.

How Does the Crosby Wireless Load Shackle Compare to Other Load Monitoring Devices?

If you’re using the Radiolink Plus on a 12-metric ton load, which is 26,000 pounds, you’re going to have a +/- tolerance of only 26 pounds.

The wireless load shackle used on the same 12-metric ton, 26,000-pound lift has a 1.0% +/- tolerance. Now, you’re talking about 260 pounds.

Although the wireless load shackle will not be as accurate as the Radiolink Plus, there are environments and applications where headroom is absolutely critical, and you won’t be able to use a Radiolink Plus.

***When customers go from no load monitoring to 1% +- tolerance, that’s a great improvement.

How Can Mazzella Help with Your Lifting and Rigging Needs?

How Mazzella Can Help With Your Crosby Item Lifting and Rigging Needs

For decades, Crosby has manufactured products designed to make the lifting and rigging industry safer. Similarly, Mazzella has the mission to provide you with quality products that are the right fits to increase your productivity and minimize your safety risks.

Mazzella is a distributor of Crosby products of all types, including but not limited to:

By using the proper equipment, you’re controlling or eliminating hazards in the workplace. That helps reduce the risk of an accident. Think about how quickly the costs of a workplace accident or fatality can add up, including:

  • Lost wages
  • Workers’ compensation
  • Low employee morale
  • Decrease in productivity
  • Workforce shortages
  • Potential legal fees and OSHA fines

Remember, putting safety at the forefront of your lifts will help increase your productivity and minimize your downtime.

Click here to contact a Mazzella Lifting Specialist today for all of your lifting needs!

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Disclaimer: Any advice, graphics, images, and/or information contained herein are presented for general educational and information purposes and to increase overall safety awareness. It is not intended to be legal, medical, or other expert advice or services, and should not be used in place of consultation with appropriate industry professionals. The information herein should not be considered exhaustive and the user should seek the advice of appropriate professionals.