Tiki 30 "Arin" left for Africa from Cornwall last weekend, but in a boisterous sea only 50 miles out,  a crack appeared  right across one of the aft beam blocks, either side of the webbing strap.
This area is built to plans (the thickness of the wood the strap goes round is greater than perhaps it looks from my photo as the leading edge is rounded to reduce the chance of chafe). The wood is Iroko, as specified in the plans.

The block that failed is for the inboard aft beam strap. This is the area of greatest forces but it's worrying that it's failed on a boat that was so carefully constructed in this area.
Rick is now fitting (rope) lashing pads on the inside hulls for these positions as he doesn't relish taking the boat out of the water again & stripping it down before he leaves. SB