I agree with you.
The field added a temporary skid and set it on fiberglass grating.
There is an engineer here giving an ok to add two air compressor on top of that skid.
I have see where operating companies specifically state not to place equipment on top of grating.
I was hoping to find a spec from someone like OSHA PIP Coast Guard (if a fire, fiberglass melts) saying not to place equipment on top of fiberglass grating.