Diagonal lashing is a type of lashing used to bind spars or poles together, to prevent racking.
It is usually applied to cross-bracing where the poles do not initially touch, but may by
used on any poles that cross each other at a 45° to 90° angle. Large, semipermanent structures
may be built with a combination of square lashing and diagonal lashing. Square lashing is
used for load bearing and diagonal lashing is used for cross bracing.
1. Start by tying a timber hitch diagonally around both poles.
2. Wrap the rope around the both poles three or four times in the same direction.
3. Start the second set of wrapping turns by going past and around the vertical pole.
4. Once you have enough wraps to give you the strength you need, guide the rope horizontally between the two poles.
5. Wrap the rope around the knot between the poles. This is called frapping. Pull the frapping as tight as possible.
6. Finish the lashing with a clove hitch around the end of a cross piece.