ANSI Z359.14-2021: Comply with the Updated SRD Standard in 2025 | FallTech®
Posted by info@customdigitalsolutions.co BigCommerce on May 16th 2025
ANSI Z359.14-2021: How to Comply with the Self-Retracting Devices Standard in 2025
By Zack Winters
Engineering Manager
For years, the American National Standards Institute (ANSI) and the American Society of Safety Professionals (ASSP) have teamed up to set clear rules for a high fall protection standard in the United States, outlined in the ANSI/ASSP Z359 Fall Protection Code.
These guidelines explain how Self-Retracting Devices (SRDs) should be classified, tested, and how they need to perform. Staying up to date with the latest changes helps keep workplaces safer and running more smoothly.
What are the Key Changes in ANSI Z359.14-2021?
On June 17, 2021, new ANSI fall protection standards were published setting improved guidelines for SRDs.
These updated rules are now part of ANSI Z359.14-2021: Safety Requirements for Self-Retracting Devices for Personal Fall Arrest and Rescue Systems.
This version replaced the 2014 standard and officially took effect on August 1, 2023. Now, let us go over what changed in the Z359.14 SRD standard, what the compliance timeline looks like, and what it all means for the fall protection systems you are using in 2025.8
What were the ANSI Z359.14-2014 SRD Types and Classes?
The previous ANSI standard, ANSI Z359.14-2014, grouped SRDs into three “types”:
- Self-Retracting Lifeline (SRL)
- Self-Retracting Lifeline – Retrieval (SRL-R)
- Self-Retracting Lifeline – Leading Edge (SRL-LE)
It also divided SRDs into two classes based on how they performed in overhead use:
- Class A
- Class B
Each class had specific performance rules, like how far a fall could go before stopping (arrest distance) and how much force was used to stop it (arresting force).
What are the New SRD Types and Classes Under ANSI Z359.14-2021?
The new standard, ANSI Z359.14-2021, re-categorizes SRDs into three types:
- Self-Retracting Lifeline (SRL)
- Self-Retracting Lifeline – Retrieval (SRL-R)
- Self-Retracting Lifeline – Personal (SRL-P)
An SRL extends and retracts with the user, locking quickly during a fall to limit freefall distance. SRLs usually have lifelines between 20 and 60 feet, but this added length can also mean extra bulk and weight.
An SRL-R includes a rescue feature that lets a fallen worker be raised or lowered, making it ideal for confined spaces. It often has a longer lifeline than a regular SRL to give rescuers more flexibility to safely reach and move the worker after a fall.
An SRL-P is a compact, lightweight device worn on the harness, offering more mobility when overhead anchorage is not available. Its small size is its biggest advantage, but also its main limitation: the shorter lifeline, usually between 6 and 11 feet.
The new standard re-classifies SRDs into:
- Class 1
- Class 2
This leads to the logical question: Class 1 vs Class 2 SRL—what’s the difference?
A Class 1 SRD is designed to be anchored overhead. A Class 2 SRD can be anchored at, above, or up to 5 feet below a worker’s dorsal D-ring.
Because it can be used in more situations, especially near sharp edges, a Class 2 SRD goes through extra testing and must have clear labels and special instructions. This added protection usually makes Class 2 SRDs more expensive than Class 1 models.
An example of a Class 1 SRL is the DuraTech Mini Web, a small SRL-P with a strong Dyneema® web lifeline inside a tough nylon housing. Under ANSI Z359.14-2021, a user must anchor it at or above his or her D-ring. Outside the scope of ANSI Z359, FallTech permits users to anchor up to 5 feet below their dorsal D-ring when no edge hazards are present due to an extended capacity energy absorber.
An example of a Class 2 SRL is the FT-X Cable, a high-performance SRL with a 7/32-inch galvanized steel cable and lighter internal parts for better performance. Under ANSI Z359.14-2021, a user can anchor it at, above, or up to 5 feet below his or her D-ring, and it is built and tested to handle edge hazards.
Find the Right Class 1 and Class 2 SRL
Explore FallTech’s ANSI Z359.14-2021 compliant Class 1 or Class SRL, ready for overhead or leading-edge use.
What are the Overhead Performance Requirements in ANSI Z359.14-2021?
ANSI Z359.14-2021 set the same overhead performance rules for all SRDs, no matter the class. It also added clear labels to help workers quickly choose the right device for the job.
In the older 2012 and 2014 versions, overhead performance was different for Class A and Class B. Now, it’s the same for all SRDs.
| f | Class A (Past) | Class B (Past) | Class 1 and 2 (Current) |
| Max Arresting Force | 1,800 lbs. | 1,800 lbs. | 1,800 lbs. |
| Avg. Arresting Force | 1,350 lbs.* | 900 lbs.* | 1,350 lbs.* |
| Max Arrest Distance | 24 in. | 54 in. | 42 in. |
| *The Average Arrest Force limit increases during hot, cold, and wet conditioned tests. | |||
What are the Overhead Performance Requirements in ANSI Z359.14-2021?
ANSI Z359.14-2021 set the same overhead performance rules for all SRDs, no matter the class. It also added clear labels to help workers quickly choose the right device for the job.
In the older 2012 and 2014 versions, overhead performance was different for Class A and Class B. Now, it’s the same for all SRDs.
| f | Class A (Past) | Class B (Past) | Class 1 and 2 (Current) |
| Max Arresting Force | 1,800 lbs. | 1,800 lbs. | 1,800 lbs. |
| Avg. Arresting Force | 1,350 lbs.* | 900 lbs.* | 1,350 lbs.* |
| Max Arrest Distance | 24 in. | 54 in. |
|
| *The Average Arrest Force limit increases during hot, cold, and wet conditioned tests. | |||
What Labeling Requirements are Included in ANSI Z359.14-2021?
All SRDs that meet the ANSI Z359.14-2021 standard will have clear labels showing if they are Class 1 or Class 2.
Class 2 SRDs must also include a fall clearance chart or diagram on the device itself and in the user manual. This gives important safety info right where the worker or Competent Person can easily see it when using fall protection systems.
How Have SRD Testing Protocols Changed Under ANSI Z359.14-2021?
ANSI Z359.14-2021 brings tougher testing rules for SRDs to improve safety and address real-world hazards. While most changes affect manufacturers and testing labs, they also impact how these devices are used in the field.
Key SRL requirements include new performance rules for overhead anchorage, more tests in hot, cold, and wet conditions, and a higher test weight of 310 pounds (up from 282 pounds) to reflect fully loaded workers. Static strength testing now uses 3,600 pounds for a 2:1 safety factor, and new tests check the strength of locking systems and brake performance.
SRL-Ps have new tests too, including 6-foot fall tests, checks on dual-leg devices, and extra testing for tie-back features and custom connectors. Overall, the standard adds more tests and stricter rules to help ensure SRDs are safer and more reliable.
Need Help Choosing the Right SRL?
Our team is here to guide you — submit a quick form and a FallTech expert will follow up with personalized recommendations.
What is the Compliance Timeline for SRDs Under ANSI Z359.14-2021?
ANSI Z359.14-2021 took effect on August 1, 2023.
For workplaces that require ANSI compliance, all SRDs must now be made and labeled to meet the 2021 standard. Any devices marked as compliant with the 2014 version or earlier are no longer considered compliant after that date.
FallTech recommends contacting your SRD manufacturer to understand how this change affects the equipment you're currently using and to start planning your switch to 2021-compliant devices. Note that your older SRD’s compliance or upgradeability may vary depending on whether it’s to a Class 1 vs Class 2 SRL standard given the convergence of leading-edge into the latter classification.
FAQs: Working with FallTech Under ANSI Z359.14-2021
When did FallTech begin offering ANSI Z359.14-2021 compliant SRDs?
FallTech has been a strong supporter of the stricter ANSI Z359.14-2021 standard and has offered compliant SRDs for several years. We provide a wide range of ANSI Class 1 and Class 2 SRDs, including popular models like the FT-R and FT-X series.
Can I update my 2014 FallTech SRDs to meet ANSI Z359.14-2021?
Some FallTech SRDs may be upgraded to the 2021 compliant version via a repair process.
Will FallTech still service Class A/B SRDs under the new standard?
FallTech no longer supports SRDs that are not compliant with ANSI Z359.14-2021. However, some third-party repair centers may still offer service for these older models.
Can I still use a non-leading edge personal SRD below the D-ring in 2025?
The answer depends on whether your job site requires ANSI compliance.
If strict ANSI compliance is needed for your SRL requirements, then as of August 1, 2023, only a Class 2 SRL is allowed for this kind of leading-edge application. If your site follows OSHA-only rules, you may still use your existing device, as long as it’s approved by a Competent Person, Qualified Person, or Professional Engineer.
As for anchorage setup, using a five-foot set-back distance from the leading edge helps stop a fall more quickly. If the anchorage is right at the edge, the SRL may let out more lifeline before locking, creating extra freefall. The device also needs enough line speed to activate its braking system. With a five-foot set-back, the lifeline begins to pay out earlier—right as the worker's D-ring drops below the anchorage point. This shortens the fall distance, lowers the maximum arrest force, and improves safety.
Why Choose FallTech for Your Fall Protection Needs
At FallTech, fall protection isn't just what we do—it's who we are. Our American-made gear is built to protect lives and backed by real expertise.
When you choose FallTech, you work directly with a team that understands your needs and moves fast to deliver solutions. As a privately-owned company, we offer the flexibility, speed, and personal service our larger competitors can't match.
We believe in full transparency. Every product comes with published test results, Declarations of Conformity, and certifications from our ISO 17025-accredited lab and ISO 9001-certified quality system—so you can trust your equipment meets OSHA and ANSI standards.
Our support doesn't end at the sale. We offer expert advice, facility tours, online resources, and comprehensive training to help you build a stronger fall protection program.
FallTech is the partner you can trust. Explore our full range of fall protection solutions, designed for your work, your industry, and your team.
Browse Our Fall Protection Resources