Guy King wrote:
The message
from Mike Scott contains
these words:

Should I not even attempt this? Any thoughts welcome, thanks!

Considering how much weight I've got in my loft on the same size joists
I don't reckon you've got anything to worry about.

For a start, do you ever walk in the loft? If so you must be putting
more load than that on the joists as you walk about.

Quite so. I've seen 3' fans on this joist size without any problem.

NT