Adding Sound Barrier to UL Listed Assemblies

[nsmarch]

Per IBC Section 721.1, “Where materials that change the capacity for heat dissipation are incorporated into a fire-resistance-rated assembly, fire test results or other substantiating data shall be made available to the building official to show that the required fire-resistance-rating time period is not reduced.”

Can someone point me in the direction of where I can find substantiating data that shows adding a sound barrier to a UL Listed floor-ceiling Assembly would not reduce the fire-resistance-rating time period? (ie. adding Homasote 440 to UL L583)

Thanks!

 

[mtlogcabin]

http://www.homasote.com/assets/files/esr-1374.pdf

See page 2 section 4.2.2
This product is limited to Type V construction Section 5.3
If the 1st link does not work try this one

https://www.buildsite.com/pdf/homasote/Homex-300-ICC-ES-Evaluation-991317.pdf

 

[khsmith55]

Just speaking from memory but as remember in the front of the UL Directory and in the General Notes of the GA Manual they address this. Again memory, in a floor/ceiling I think you have to add an additional layer of Gypsum Board if you add batts to the assembly if they are not shown.