Tony Bryer wrote:
Chris Bacon wrote:
I wouldn't like to drill into one of these brick height
lintels, they're a bit of cheap "wire rope" in a sludge
of (albeit carefully concocted) "concrete".

A little more than "cheap wire rope"

Really? In what way?

a prestressed cable held under
a lot of tension while the concrete cures.

So? Why is it any more than "cheap wire rope"?