Possible to achieve a 2hr wood truss floor assembly without gyp. crete?

[Ryan Schultz]

We are renovating an existing 1st floor space to a R2.
The floor assembly between this 1st floor R2 and the existing R2 on the 2nd floor, needs to be 2hr rated.
We have existing wood floor trusses with 3/4" CDX floor sheathing.
Is there anyway to get a 2hr rating floor assembly, by using just gyp bd and resilient channel below the trusses?
Basically looking to avoid having to pour a new layer of gyp crete on at the 2nd floor. Would have major cost implications.

 

[TheCommish]

If you can fine a listed assembly without the gypcrete propose it

 

[Inspector Gadget]

 

[classicT]

Gypcrete is commonly for the sound performance. Any STC requirements apply?

 

[Inspector Gadget]

Or you could add FOUR layers of 5/8 type x;

https://evstudio.com/achieving-a-2-hour-floor-ceiling-assembly-from-the-underside-only/