In message , Tim Watts
writes
wrote:

On Wednesday, October 17, 2012 11:49:06 AM UTC+1, GMM wrote:

I have to build a floor in a loft. At first this will provide a platform
for some roof timber repairs to be carried out but ultimately it will be
used for storage, not living space, so there are no formal BR
requirements but, of course, Id like it to be robust enough that it
doesnt all wind up in the bedroom below.

At present, there is a lath and plaster ceiling, with rather
wimpy-looking ceiling joists, so not the most
stable platform to work on. Its in pretty good condition (as a ceiling,
not a floor) so Id like to keep it

2x8 joists is unusually large for loft storage. Almost all old joists are
quite able to handle storage. So I wonder if you've fully and correctly
evaluated the situation, ie what the current joist dimensions are (all 3).


NT

Did the OP ever say exactly what his current joists were?

Not that I noticed:-)

The ones holding up our lath and plaster ceiling are around 3"x2".
Raised tie/included attic so about 12' span.


--
Tim Lamb