Stuart Noble wrote:

Someone suggested that they are light and easy to shift - not unlesss you
are a gorilla.


I can't see that they weigh more than 25 kgs, otherwise anyone who had
cause to lift it in the course of their job wouldn't be allowed to do so.

Well firstly they'd only weigh that much (if they do) when filled with
blocks and sand, so the installer would never actually need to lift it
like that; and secondly, many people in many jobs need to shift things
which weight more than 25 kg! The answer is to have Special Handling
Equipment...

David