On Sep 3, 3:30*pm, Adam Funk wrote:
from the owners to the effect that they weren't allowed to provide
doorstops because of fire regulations.

There seems to be no consistent policy (or implementation) over this
and it's the whim of local fire inspectors. Is wired glass essential,
or forbidden? Must perfectly good firedoors be removed and replaced,
for new ones with magic plastic plugs in their edges? Must new
intumescent strips be fitted to non firedoors (an awkward enough job),
despite not even bothering to check that the old strips have fallen
out of some of the old doors?

However you can wedge firedoors open (at a price) if you use magnetic
holdbacks that are self-closing in the event of a fire. I'd check with
your inspector first though.