Guys, Ive recently obtained a rigging job in a local shipyard in the U.S..
But for some strange reason they use a square knots to tie two ropes together
with half hitches at the ends in case it slips.
Please say where this is (at least in general terms for regional
and historical aspects). It is useful/informative to get
reports from actual practice (vs. speculations from arm-chair
readers). It's quite surprising that there should be such
knotting in a shipyard. What sort of rigging work is done
(and so on)? What other knots are employed?
I found this unacceptable since Ive learned square knots shouldn't be used with heavy loads.
There are various reasons to prefer some other end-2-end
knot (and not to pretend that this, too, isn't such a knot!),
and sometimes reason enough to use this (typically with
ends secured in some manner --it is maybe the trimmest
end-2-end knot).
What applications are being done with this
reef knot?
What sorts of materials ... ?!
(Do folks ever expect to untie the knot? --and can they?)
So I showed them instead to use a a double sheet bend
as a quick way to join two ropes of similar sizes.
And even not-so-similar sizes/natures
(size might not be the only influential factor).
But let me suggest a better though similar alternative,
what I call the
"double Lapp bend" :
regard the single
sheet bend --ends on same side--
when
loaded in reverse (i.e., by the tails)as a single
Lapp bend;
to "double" it, take the *hitching* tail (this is the
one making the loop, not the U/bight) around its
own S.Part again and back down through the bight (U)
again --this, to secure it; and this step can be repeated,
for a "triple" such knot, as might be desirable given
some circumstances.
Why this ... ?
Because this wrapping of the one tail will secure the
knot
when unloaded, against loosening (if set well),
whereas the
sheet bend might never get tightly
set (OTOH, it can jam with heavy loading --YMMV).
To loosen and untie the
dbl. Lapp bend,pull the tail of the U-part (bight) away from its S.Part
(to prise out some of the hitching S.Part), and then
you should be able to work it further loose.
(I will not presume such forcible loosening to be
possible always; and it might be something needing
mechanical help for force, where large forces are
involved.
--dl*
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