"B.B." u wrote in message
news
In article ,
John Ings wrote:

On Mon, 27 Dec 2004 10:04:43 -0600, "B.B."
.ru wrote:

Turns out when they recently overhauled the cranes there someone
ordered a wrong bolt--was off by one line in the chart. So the
connection between the hook and the pulleys wasn't strong enough and
gave way.

Um. After maintenance don't you stress test your cranes with a max
load of test weights?

Not been near cranes for over twenty five years now and even before that
Cranes had to have a test certificate so had any chains or wire ropes used
for lifting purposes. No test certificate, no insurance. These had to be
renewed annually. But that was in the UK.

Steve