In this post you will learn how to lash. Lashing is used to join objects together which, amongst other things, is very useful for construction.
Described below are 4 types of lashing. For all of them, you will need quite a long running-end.
If you are not familiar with basic knot terminology it may help to read this post first.
The information in this post has been taken from The Useful Knots Book by Sam Fury.
How to Lash
Square lashing is used to hold poles together at a 90° angle.
Place two poles together in a cross formation so that the vertical one is on top of the horizontal one.
On the vertical pole, below the horizontal one, tie a clove hitch.
Pass the running end under the horizontal pole (on the right side of the vertical pole), then over the vertical one (on the upper side of the horizontal pole).
Pass the running end under the horizontal pole on the left side and pull it tight so that the clove hitch slips to the right side of the vertical pole.
Continue to pass the rope over the verticals and then under the horizontals in this anti-clockwise fashion. Pull each pass tight as you go. Make three full rotations.
The long end of the rope should finish having come underneath the right side of the horizontal pole. Bring it back over the front of the horizontal pole and then behind the lower end of the vertical pole. This is called frapping. Pull it tight.
Go over the left side of the horizontal and then under the top side of the vertical and pull it tight. This is one frapping rotation. Do a total of three frapping rotations and then tie a clove hitch on the lower side of the vertical pole.
When doing the clove hitch make sure you pull the first half hitch tight before doing the second.
Trim any excess away and/or tuck it under the lashing.
Diagonal lashing can be used when the poles do not cross at right angles. It is also useful for when the poles need to be pulled toward each-other for tying.
Cross two poles on top of each-other and tie a surgeons knot around them horizontally so that the running end is to the right.
Pass the running end back behind the poles so it is on the left side.
Bring the running end horizontally over and under the poles. Pull it tight. Do this three times.
The running-end finishes on the left. Go over the bottom left pole and then under the cross so it comes over the top vertically. Pull it tight.
Do three vertical turns pulling tight after each one. Your running end finishes running vertically down.
Do some frapping turns by passing the rope under then over each pole in an anti-clockwise fashion. Keep it tight. Do three full rotations.
Finish it off with a clove hitch and trim if needed.
A sheer lashing is good for joining poles together in a parallel fashion.
Put two poles together side by side so they lay horizontal. Tie one clove hitch around both the poles to the left of where you intend to make the rest of the lashing.
Lay the short end horizontally between the two poles to the right of your clove hitch so you will lash over them.
Wrap the running end around the two poles pulling it tight after each turn.
Do at least as many turns so that the lashing is the same length as the width of the two poles.
Do frapping turns by passing the rope between the two poles at the right side and then coming back up between them on the left. This should be hard to do since you pulled the lashing turns tightly.
Do two frapping turns and finish it with a clove hitch on one end around one of the poles.
Note: Wedges placed in between the two poles can be done instead of frapping.
An A-Frame lashing is the same as a sheer lashing but you need to make the lashing and frapping turns a bit loose.
Pull the legs apart to make the A-Frame.
LEARN MORE useful knots in The Useful Knots Book by Sam Fury.
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