I bought a Westinghouse Saf-T-Brace (Model 01400) for use in
installing a ceiling fan. Unfortunately, I have discovered the
ceiling joists are only 10" apart (edge to edge) in the spot I want to
install the fan (after I cut the hole in the ceiling). Do they or
anyone else make a shorter version of the brace?

If not, has anyone every tried to cut each piece of the brace, to make
it shorter? The threaded rod looks like some kind of hardened steel.

Any other suggestions?

Thanks.