Multi-Point Anchors
In rope rescue, single-point anchors aren’t always enough. Sometimes they’re weak. Sometimes they’re in the wrong place. And sometimes, they’re simply not there at all.
That’s where multi-point anchor systems come in.
These systems combine two or more anchor points into one unified structure. They give you options when you need strength, flexibility, or backup. While advanced setups require precision, this section focuses on the foundational logic behind multi-point anchors—what they are, when to use them, and how they behave under load.
When to Use a Multi-Point Anchor
Multi-point anchors are used when:
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You need to back up or reinforce a primary anchor
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Available anchors aren’t located where they need to be
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The load might shift direction during the rescue
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One anchor point isn’t strong enough to handle the load alone
These systems allow you to build strength, create balance, and adjust for less-than-ideal environments.
Keep ERNEST in Mind
The acronym ERNEST is a quick reminder of what every anchor should be:
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Equalized – Shares load proportionally
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Redundant – Has a backup
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Non-extending – Won’t shock the system if one point fails
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Efficient – Simple and quick to build
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Strong – Built to handle expected forces
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Timely – Appropriate for the time and conditions
Even in basic systems, ERNEST helps ensure your anchors are solid.
Types of Multi-Point Anchor Systems
Rescue rigging expert Steve Crandall outlines four main types of multi-point systems. Understanding how each works helps you match the system to the situation.
1. Slack Anchor Systems
These anchors are not under tension during normal operation. They’re there as a passive backup—just in case the primary anchor fails or shifts.
They don’t share the load unless something goes wrong.
2. Tensioned Anchor Systems
These setups use mechanical advantage systems—like pre-tensioned back-ties, AZTEKs, or Munter Mules—to apply force between anchor legs.
They offer greater control and load balancing but require more setup time and experience.
3. Load Sharing Anchor Systems
Also known as fixed or focused anchors, these systems split the load between multiple points using independent connections.
They don’t move once built. The load stays centered. This setup helps avoid shock loading and keeps both anchor legs engaged throughout the operation.
Note: The term “load distributing” was once used here, but “load sharing” is the correct term for fixed systems with shared, stable tension.
4. Load Distributing Anchor Systems
This system adjusts dynamically as the load moves.
It typically uses a single piece of rope or webbing. If the load shifts or one anchor fails, the system automatically redistributes tension to the remaining anchor.
That flexibility can be useful—but it also introduces slack, stretch, and potential shock load if not managed carefully.
Anchor Angles: Why They Matter
The angle between anchor legs directly affects how much force each anchor absorbs. The wider the angle, the greater the force.
Key reference points:
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30° – Ideal
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60° – Safe
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90° – Increased force on anchors
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120° – Critical threshold; anchor legs may carry nearly double the load
If you exceed 120°, you’re in unstable territory.
Bonus tip: Introducing a deviation in one anchor leg—without proper understanding of anchor physics—can easily destabilize the system.
Final Thought
Multi-point anchor systems are built when the environment demands more than a single solution. They’re not just about strength—they’re about adaptability.
Know when to use them. Know which type matches your situation. And above all, know that a well-built multi-point anchor is the difference between working with the terrain—and working against it.
