Roo its not just a trellis it is the wall to a yurt
http://www.yurtshop.co.uk/yurts.html
If that is the case, then it is not a trellis at all.
Someone needs to try "Google (trellis wall)" or
Webster's 3rd New International Dict. among others.
To further add to the tactic of joining two cylinders by means of some
cordage through drilled-diameter holes,
let me muse (more timid than
suggest, even, let alone
recommend!)
about orienting the drilled-diameter holed in
parallel planes -- so that
the (no necessarily so constructed?!)
ring of cord would now equally
span the distance between poles/holes on either side!? And the two sides of
cord would be equally taxed, pulled between an underside & upperside hole;
tightness with pole (collapsed) in parallel relation would become tighter upon
opening them -- and one might expect such a ring tied in usual materials to
accommodate such tightening rather nicely.
Length of material for the initially envisioned stopper-2-stopper, like a bolt,
securing is 2D + (stopper-1 + stopper-2);
that for my earlier-suggested (I was bold then) ring that ran through the
holes oriented in line and then around one side is 3D + piD/2 + bend ;
and that here meekly mused is 4D + bend, a tad less than other ring.
Now, as for the joining knot, I have a better recommendation, which is
to essentially make a bend of Ashley's eyeknot #1029 (which Budworth
later calls a "Tricorn Loop"; this I think can be tied pretty tightly and
efficiently (of both material & time/effort) --tying the Overhand with
a short (wasteless) end around a big (for adjustment) bight, tight,
and then pull ring to desired tightness via bight leg, and then pull
the other bight leg to lock tied, and cut off end.
Again, part of the appeal I see in using a "ring" vs. "bolt" of cord
is the ability to re-position the cordage and thus put new parts
at the hole-end wear points.
--dl*
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