Page 49 - Jane Renolds - Knots Your Complete Step by Step Guide to Knot, Knot Uses, and Knot Tying

Diagonal Lashing

A different version of the Square Lashing, this could also hold poles
together but in a diagonal manner. You could also add the timber hitch so
you could close gaps even more, or have your poles tightened to the ground
so you’d definitely be safe!

http://bsar.org/files/Diagonal-lashing.jpg

Instructions:

1. First, make a single timber hitch, and then wrap them twice or
thrice around the two poles. Do so only in one axis.

2. Follow the first axis with other one.
3. Now, have the lashing tightened by making 3 or more frapping
turns.
4. Use a clove hitch for the ending.