On Sun, 22 Nov 2020 02:39:29 +0000, williamwright
wrote:

On 21/11/2020 18:45, T i m wrote:

They
seem to only give the static load not any dynamic load figures. Is
climbing and descending a ladder a static load?

Good question, however, if they are rated as '150kg max load' you can
be fairly sure that won't be close to the failure point and in the
worst case of usage (eg, lower than 70 degrees or with someone
'bouncing' on it).

Never mind the theory. Any ladder that you plan to use, place it fully
extended horizontally on the ground, supported only at the ends by saw
horses or piles of beer crates or whatever. Climb onto the midpoint
carrying any likely load.

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?

If it takes that it's OK. That was my periodic
test of ladders for all my years of using them.

Whilst that makes sense from your POV and whilst being willing to
accept the limitations of conventional ladders, it's no more valid for
my intended usage than seeing how easy it is to carry a piano in a
sports car.

Cheers, T i m

[1] Whilst I'm sure many would use a std 'climbing' ladder in ways not
covered by the instructions, that doesn't mean doing so is acceptable
or valid, as you would quickly learn from the solicitors of anyone
injured because of such.