On Mon, 11 Mar 2019 09:33:46 -0000, Bob Minchin wrote:

On 11/03/2019 02:03, Commander Kinsey wrote:
On Mon, 11 Mar 2019 01:26:11 -0000, Dean Hoffman
wrote:

On 3/10/19 3:53 PM, Commander Kinsey wrote:
On Sun, 10 Mar 2019 20:45:31 -0000, Robin wrote:

On 10/03/2019 13:44, Commander Kinsey wrote:
My neighbour has a tall chimney (for a wood burning stove) with a
supporting cable, but only one. Obviously the wind doesn't always
come
from that direction (in fact the cable is to the SE of the chimney,
and
the prevailing wind here is SW). Same thing is observed on telephone
poles. Any explanation? Is the pole put in at a bit of an angle so
it's always leaning one way?

Are you sure it's a cable and not a rigid rod/pipe that braces the
flue?

I can't see from this far away. Are you suggesting it can take a force
in more than one direction? Even if it can, it would only be push and
pull, not sideways.

Maybe there is a second solid brace you can't see. That would
make a triangle.
Those are pretty solid.

If there's anything else it's under the roof tiles.
If the support is split between above and below the roof then it implies
significant stiffness in the pipe itself. Which if true suggests it does
not need an external cable.
I suspect it was installed for largely cosmetic reasons rather than for
sound engineering principles.
If it does eventually fall down the cable will probably stop it crashing
to the ground and causing personal injury ;-)

It does look quite stiff, but it's a tall chimney and there could be a fair force on it from wind, which they won't want transferred to where it's attached to the stove, which could cause a leak of fumes into the house.