A Photo & Discussion Forum for Wharram Design Enthusiasts
I do the same method on my Tiki 21 with no issues at all. I did some extra rounding off and built up with extra epoxy and silica where the lashings go around the top part of beam. I have pre-stretched super low stretch line for lashings and frap with dyneema. once I have four wraps of dyneema I tie end in a clove hitch to a screwdriver and pull the shit out of it. With this the lashings are extremely tight. If using low stretch line, lashing with the line wet makes it a little more stretchy and then it tightens up well when it dries.
KC and Troy built hardwood pads for on top of the beams with a groove in the middle where the line goes over. That would be much easier than messing with the beams!
I've just cut 25mm conduit to put under the lashings where they cross the radius of the beam edges.