NFPA 13:2022 _ sprinkler protection warehouse polyurethane foam block

[stfire]

According to NFPA 13 (2022 edition), what type of sprinkler protection is recommended for polyurethane foam blocks stored on roller conveyors?
The roller conveyors, similar to shelves with multiple storage levels, are intended for the curing of the blocks of polyurethane foam.

The material is certainly classified as "Exposed Group A expanded plastic".
Thanks for your opinion.
gf

 

[NOLAscience]

I can see this factory being featured on "How It's Made" in a future episode.