Fred99: That's a good idea. While nobody was killed in the Chch quakes due to chimney collapse, there were many serious injuries. If the quake didn't happen in the middle of a work day, then things would have probably been very different/worse.
Indeed. I seem to be the only person in our shortish street who has knocked their chimney down to date. Here's a few pics of my work:
Roof open and some bricks removed:
Looking up into the attic to the top of the chimney:
New beams and battens installed, and one of nine tiles in place:
Six of nine tiles in place:
I made a mistake and discovered that I needed three more tiles, which luckily I managed to buy on Monday. These type of concrete tiles are no longer made.