On 2 Apr 2008, at 20:05, Ron Jones wrote:
> OTOH I've seen plenty of Armco that's been bent and damaged by boats
> tying
> up to it. Trouble is, it really depends on the area - I suspect that
> some
> places are better than others, it must depend on the ground structire
> and
> therefore how well the bolts keep it in place.
>
OTOOH, I've been boating since '75, the last four years as a genuine
cc'er. We've been tying to the Armco ever since it started being widely
used for bank protection, and I can recall maybe one occasion when the
piling has been distorted by our so doing. We use chains passed through
next to a ground anchor point whenever possible, so that the chain
cannot be dragged between the Armco barrier and the piling.
IMHO, pins are capable of doing vastly more damage to unpiled bank, and
the longer the pin, the worse the damage. How many times do you see
wash wall coping stones toppled into the cut as a result of the
leverage of a pin behind it?
I reckon, with others in this debate, that most of the damage to Armco
is as a result of impact - some boaters seem to think that the way to
lose forward way is to piont the bow at the bank and brace yourself...
––
All the best
Bruce
"Never stay up on the barren heights of cleverness, but come down into
the green valleys of silliness.” Ludwig Wittgenstein
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