On 22/11/2020 10:34, T i m wrote:
Hmmmm. So a 5m 3 piece ladder could fail that tests where the same
design in 3m might not? What if all 5m ladders failed (such an
unreasonable test for the intended design / use [1]) what would you do
then?

They wouldn't, but if they did I wouldn't climb. I used ladders all day
and every day from age 17 to age 62 and I'm still here. I do actually
know quite a lot about ladders.

Bill