How to Tie the Square Knot

 

Usage

The Square Knot is best used for binding two ends of the same rope together when securing objects, bundling materials, or fastening bandages. It can be used to tie two ropes together, but it shouldn't be relied upon for any critical applications. There are more secure knots for that, like the Zeppelin Bend.

Why Learn the Square Knot?

• It’s one of the most fundamental knots, easy to learn and tie quickly.
• Useful for securing items like bandages, parcels, and sails.
• A great introductory knot for beginners in scouting, sailing, and outdoor activities.

Common Uses

• Boating & Sailing: Securing sail covers, reefing sails.
• Scouting & Camping: Tying bandages, securing gear, making lashings.
• First Aid: Binding a dressing or splint.
• Household & Utility: Tying up bundles, securing trash bags, DIY projects.

 

ABOK Number  (Ashley Book of Knots)  #1204   Other Names Reef Knot Hercules Knot Double Knot Brotherhood Knot   Category Binding Knots

 

Notable Features

• Quick & Easy: Can be tied and untied effortlessly.
• Great for Bundling: Works well when binding two ends of the same rope.
• Lies Flat: Sits neatly when tied properly.

Variations

• Slipping both tag ends creates the foundational knot used in tying shoelaces.
• Adding an extra wrap before completing the final overhand knot results in the more secure Surgeon’s Knot.
• If the ends are crossed in opposite directions, you’ve accidentally tied a Thief Knot, which looks similar but is far less secure.

Similar Knots

Double Fisherman’s Bend vs. Square Knot

• Pros: Extremely strong and secure for joining two ropes.
• Cons: Difficult to untie after being loaded, bulkier than a Square Knot.

Sheet Bend vs. Square Knot

• Pros: Excellent for joining ropes of different sizes, secure under load.
• Cons: Not as suitable for binding two ends of the same rope, can slip if improperly tied.

History

The Square Knot has been around for thousands of years, originally used by sailors to reef sails—hence the alternate name "Reef Knot." It was also widely used in the medical field for tying bandages and sutures. The Square Knot appears in The Ashley Book of Knots (#1204) and remains a core knot in scouting, sailing, and everyday life.

Source: Sailing World

Security Level

The Square Knot is NOT secure for load-bearing or critical applications. It can capsize under uneven strain, making it unreliable as a bend (for joining two ropes). However, for binding a bundle where tension remains equal, it performs well.

Downsides

• Prone to Slipping: When misused or when joining two ropes.
• Fails Under Uneven Strain: Not reliable for load-bearing applications.
• Easily Mistaken: Often confused with the weaker Granny Knot.

Structure (Step-by-Step Instructions)

1. Cross the right end of the rope over the left end and tie an Overhand Knot.
2. Cross the left end over the right and tie another Overhand Knot.
3. Pull both standing parts to tighten. The free ends should exit on the same side.
4. Double-check to ensure the knot lies flat and is not a Granny Knot.

FAQ

Is the Square Knot safe for climbing or rescue?

No. It is not secure enough to hold under heavy strain.

What is the difference between a Square Knot and a Granny Knot?

A Granny Knot has its free ends exiting opposite sides, making it prone to slipping. The Square Knot’s ends exit on the same side, creating a more stable binding.

How can I make a Square Knot more secure?

Add an extra Half Hitch on both ends or use a Surgeon’s Knot for additional hold.

Can I use the Square Knot for tying shoelaces?

Yes, it forms the foundation of the standard bow knot used in shoelaces.

Important Notes on Safety

• Do NOT use for joining ropes under strain.
• Ensure it is tied correctly to prevent failure.
• Always inspect the knot before use, especially in critical applications.