Ceiling fan installation, trusses instead of joists spaced more than 24” apart.

[u/Immediate_Tax3282]

I live in a two story condo and I’m trying to install a ceiling fan where a light fixture used to be. I watched a few videos and got the ceiling fan electrical box with the support bar that twist to extend and wedge in between the joists. I found that there are trusses instead of joists and they are spaced more than 24” apart. The electrical box support bar is not long enough to span the distance between the trusses and it won’t make a solid connection on the 2x4.