I bet there strapped together with a belt that goes on the inside of that colum.
I'm not sure I understand this 'dig'.
Are you saying that some window cleaners, who've broken the 'hooks' on their ladders, stap them together with a belt, so they stay apart?
I once borrowed a set of ladders; big doubles; to get at some third-story windows. The window cleaner forgot to tell me that he'd taken the 'tips' off the 'hooks' in an accident when he dropped the upper section which collapsed, slicing off most of the 'hook'.
So when I used them even though the hooks weren't 'hooks'! They were 'short-flats'.
I was still daft enough to use them though.
Only once.