Lashing test

Comment by Wolf on November 19, 2012 at 1:29am

Hi Rogerio,

looking very strong. 7 turns should suffice. How do you plan to tension the lashing? Frapping turns seem not to be possible.

Cheers,

Wolf

Comment by Rogerio Martin on November 19, 2012 at 8:57am

I don't know , yet. some suggestions?

Comment by paul anderson on November 19, 2012 at 1:11pm

tie the frapping at 90 degrees to the lashings so you have it running under the the cleat on the side of the beam?

Comment by Wolf on November 19, 2012 at 3:04pm

You could glue a piece of hardwood - say 5cm - on top of the beam. Then you do the lashing; first turn left of the block, second turn right, third turn left again of the block and so on. After that you have probably the space for a frapping turn. Just a thought...

Comment by Ann and Neville Clement on November 19, 2012 at 10:00pm

Put in a wedge?  Maybe two wedges with one going one way and the other the other way and a little lashing line to keep them in place? 

Comment by boatsmith on November 20, 2012 at 10:02am

Rogerio, those blocks are designed to be used straps. I don't think you can get enough tension on your lines with this method. The lashing method uses plates attached to the shear strakes. This allows enough separation between the  bundles of lashings to make frapping an effective means of tensioning. David

Comment by boatsmith on November 20, 2012 at 10:04am

you could put a lashing between the in board lasing and the outboard lashing and tension this lashing to pull the beam lashings tight. 

Comment by Rogerio Martin on November 20, 2012 at 4:34pm

David I Know, I choice a third method of book build, and I will glue one piece of ply each side of the ropes, to keep them in place. The problem is the tension, I not discard the straps, but is difficult here find the right material.  In doubt, I prefer the ropes.

And have one problem with this blocks for straps. I',m alone in south america, and have a lot of doubts, whem align the blocks, we decide respect the 4cm tickness minimum, and this decision make blocks too high. Mainly in the front beam, If the decision were lashing outside the hulls (like tiki 26) all blocks can have 4cm tickness maximum (the diference is outside and inside the blocks)

But this rope is aparent strong, one bowline, one sheetbend double, and five singles knots, maybe a double wedges give me a ideal tension.  

And in water if will have some problem, we can change for straps some day.

Build to strech...

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