Knot – square lashing

July 20, 2017

Attach two sticks or poles together rigidly using this handy knot – particularly useful for natural frames, den & raft building.

boy holding to sticks that have been square lashed together
Author: Muddy Faces

Age Range: 6+

Duration: less than an hour

Location: anywhere

Time Of Day: any time

Season: any

Tags: knot, stick, string

Category: bushcraft & survival


Make sure you cut a much longer length of rope or string than you think you require. In this example we cut lengths of string approximately 2 metres long.

The string or rope needs to be strong (not with a low breaking strain). When you tighten the string to make the joint rigid it exerts quite a lot of pressure and you don’t want your string snapping all of the time.

You’ll need a knife or scissors to hand-cut the string or rope.

If you are using a man-made rope (e.g. para cord or hempex), you’ll need to heat seal the ends to stop the cord from fraying.

Step 1 – tying on

Tie the string to one of the sticks – a clove hitch is a good knot to use, but not essential.

Leave a short length (approximately 10 centimetres) loose at one end (for tying off at the end).

clove hitch tied on a stick

Step 2 – square lashing

Place the 2nd stick under the first, at right angles.

Take the string down, away from the knot, under the 2nd stick, and back up towards you.

Square lash step 2

Step 3

Take the string over the top stick and down, then under the bottom stick.

(Note: in this photo the sun is catching the tail-end leftover from the tying on and it looks like the hand is holding this – it’s not. If you look closely you can see the string under the bottom stick. This image shows that the sticks have been rotated 90 degrees).

Square lash step 3

Step 4

As you pull the string up towards you it should be going over your tying-on string.

As you follow this back over the top stick you should be arriving back where you started.

Square lash step 4

This completes your first wrapping.
The wraps should cross at a 90º angle… this right angle gives the Square Lashing its name.

Step 5

Follow the line of the string, tracing around three times. Try to keep tension on the string as you do this.

square lash step 5

Step 6 – check it looks correct

Once you have been around 3 times return to your initial knot and stop.

At this stage it should look a little like the photo.

If you are super neat you can make sure the lines of strings line up next to each other.

square lash step 6

If you wiggle the sticks you will feel they are pretty loose, despite putting tension on the string as you tied them together. This neatly leads onto the clever part…

Step 7 – frapping (tightening the lashing)

Instead of continuing along the normal path, turn off and pass the string around the outside of the lashing, effectively creating a ring in-between the sticks.

square lash step 7

Step 8

Continue wrapping around in this direction, pulling at the string to keep it as taut as possible. This process is known as frapping.

Wrap the string around approx 3-4 times. More is fine, or if you’re near the end of your string make less turns.

square lash step 8

Leave about 10cm remaining to tie-off to the loose end left from your initial ‘tying on’ knot.

At this stage, if the lashing has not become taut and the joint rigid, then I suggest you unwrap the frap and re-do it, pulling harder this time.

Tip: keep your finger on the last bit of string as you move about to prevent it loosening.

frapping a square lash knot

Step 9

Tie-off the two ends of the string firmly.

tying off a square lash knot

Step 10

Cut loose ends off with a knife or scissors to neaten it all up.

cutting the ends off a square lash

Ta-daaaaah! Two sticks square-lashed together!

Revel in your knot mastery!

If it all looks a bit wrong don’t worry,  just go back to the start and give it another go – all knots take practise.

completed square lash