A knotty problem

[clcuckow]

Hi All,

I am making a bamboo stand for my canoe and have knot problem. I want to lash a T e.g. a horizontal platform at right angles on top a vertical post.

I cannot find any pictures or instructions on how to do this type of lashing.

Hope you can help.

 

[Pignut]

Try a "Square lashing" as the scouts call it

Would be difficult to describe but may give you a search for Google

Simple enough but may be a bit on the slippery side on bamboo!

Hope this helps!

[Edit: Try this.. hope it helps]

 

[clcuckow]

Thanks Pignut, I know the square but I cannot use it as I have do not have a north I have cut a pocket in horizontal and the post sits in it. I know that I could knock a horizontal peg in the post and lash that against the horizontal but I wanted to use that as a last resort.

 

[Seagull]

Hi All,

I am making a bamboo stand for my canoe and have knot problem. I want to lash a T e.g. a horizontal platform at right angles on top a vertical post.

I cannot find any pictures or instructions on how to do this type of lashing.

Hope you can help.

"On top"...as in directly across the end, I suppose.

Hmm.

If it was "across", then you would have enough of a upstand, to do a "Square lashing" as already given ( often called a "Transom lashing.").

But, "on top", means that whatever lashing you use, would be subject to rotational instability in the long axis.

If you could minimise this, by afixing 2 short stubs below the top spar and then, using these stubs to run stays each side of the spar, (thats 4 in all), then , turn all tight with a spanish windlass, maybe you could reduce the rotation....but I rather think that by the time these preventers were sufficiently tight, you would,ve bent the top spar.
Alternatively, "fab -up" a couple of shoulders, like shelf brackets, lash them to each other, around the upright, below where the spar is to be( you would also need to set the brackets on a good collar)...then lash the spar down atop the brackets.

Or
The easiest and least long winded, but far less interesting...is to square lash the stub bars .

However, if you are using two uprights, one at each end of the canoe, the you could easily stop the rotation, by cross guying the spars to a , fixed point tween the two, preferably low down.


Ceeg