I had a few reasons for starting this thread.

As us clear from the picture, the installer arrived well prepared to hang his stuff from the chimney .... that sure looks like a store-bought strap and clamp arrangement.

Yet, I recall a few years back someone posted a link to a code that specifically addressed the issue, and the practice was clearly prohibited. I'm not able to find that link frown

BTW, it's been a very long time since 'chimneys' were really chimneys around here. That is, the vast majority - this is an example - are used to vent modern furnaces and gas-fired water heaters. This particular house does not have a 'fireplace' or any means to burn wood. It does, I believe, vent an oil furnace.

Indeed, some of the trendier places have completely fake 'chumneys,' tacked on for appearance alone.

I wonder if the same prohibition would apply?