On 08/07/2011 18:36, John Rumm wrote:
On 07/07/2011 12:24, Timothy Murphy wrote:

As a matter of interest, what is the greatest height
that a relatively sane man would reach on a ladder?

Most manually erected ladders (i.e. without rope extension systems) seem
to top out about 35' (10.5m) - which means you could reach a bit above
that safely (although not step off onto a surface etc at that height.

I've been up a wooden ladder of around that height to access a temporary
platform up the side of a factory. The bounce in the middle of the
ladder was quite unnerving.

Lying on the platform checking an instrument when it began to snow
heavily was not good either.

SteveW