Knot List: Square Lashing ‐ Step-by-Step
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Square Lashing TechniqueStart with a Clove Hitch around one pole. Twist short end around long and wrap the rope around both poles, alternately going over and under each pole about three or four turns. Tighten the lashing by surrounding it with three or four frapping turns. Finish with two or three tight half hitches.
Square Lashing Details
Use: The Square Lashing (ABOK # 2114, p 343.) is used to bind two poles together. The lashing is designed to be load bearing and can be used to create scaffolding. Although the two poles usually cross each other at 90 degrees, the Square Lashing may be used when the angle between the two poles is as little as 45 degrees,
Scouting: Square lashings can be used to make a rectangular frame as shown here. Many applications have been described including: making support frames; when two trees are close enough, a table can be supported by a pair of poles or branches lashed horizontally either side of the trees; a fence can be constructed by driving poles into the ground and then joining them with bars attached with Square Lashings; and a raft can be created by lashing bamboo poles across each other.
Tying it: The animation shows the preferred method of making this lashing. Turns are added internally around one pole and externally around the other. Here, each extra turn is added inside the previous one on the horizontal pole but outside the previous one on the vertical pole. This presents a flat array of turns to be surrounded by the Frapping Turns – and each turn will be subject to tightening.
Frapping Turns: The turns surrounding the lashing at right angles exert a tightening effect on the lashing. These turns are known as Frapping Turns. Pulling them as tight as possible makes the Lashing more secure. Various techniques are recommended but I'm indebted to Dana Holgate for the following: make use of your leg-strength. wrap the rope around a stick. Stand on the poles being lased with your knees bent, hold the stick across your thighs and then straighten your legs to tighten the lashing.
Alternative Finish: The final half hitches may be located on top of the Frapping Turns, i.e., add two more Frapping Turns in the form of Half Hitches.
Disclaimer: Any activity that involves ropes is potentially hazardous. Lives may be at risk - possibly your own. Considerable attention and effort have been made to ensure that these descriptions are accurate. However, many critical factors cannot be controlled, including: the choice of materials; the age, size, and condition of ropes; and the accuracy with which these descriptions have been followed. No responsibility is accepted for incidents arising from the use of this material.