Page 69 - Peter Randall - The Craft of the Knot

STEP 2 Wrap the rope around both poles with light and even tension, leaving enough
space between them for the frapping turns. Continue making wraps until you cover a
distance that’s about twice the width of a single pole.

STEP 3 Make two frapping turns and finish with a Clove Hitch.

STEP 4 If the lashing is not too tight, the legs can be spread to use as “sheer” poles.

If the poles need to be spread to make an A-frame, make sure the tension is moderate.
If they need to stay very rigid with each other, try using more than one Sheer Lashing.