Floor truss fire rating – GreenBuildingAdvisor

Hello smart people,

I have an 18″ open web floor truss assembly in a single family residnce.  I had planned on it being left open to the unfinished basement, but my code enforcement advised me that it needs to be fire rated.  I see an exception in the 2018 IRC for the material being the equivalent to a nominal 2×10.  Has anyone run into a truss meeting that requirement or another exception.  It would be awful to put up a drywall ceiling in a utility room that’s covered in pipes and wires. 

Thank you for any advice or guidance.

https://codes.iccsafe.org/s/IRC2018/chapter-3-building-planning/IRC2018-Pt03-Ch03-SecR302.13