There's this:
http://scchildcare.org/media/972/Inspection-Guide-for-Child-Care-Centers.pdf
"
Rooms shall have a one (1) hour fire rated separation. No fire rated separation is required between adjacent rooms caring for children less than twenty-four (24) months of age."
You can't have a one-hour rated wall if the fire can jump thru a drop tile over into the next room. Ceiling has to be rated as well.
Here's some other relevant information:
"Minimum Class C flame spread rating for the [day/class] room"
"Storage not within 2 Ft. of ceilings (inner room area)"
"Storage not permitted in electrical or mechanical rooms"
"No storage in attic or under floor space not permitted unless protected"
"Electric panels labeled"
"Separate source of emergency power"
"Access 30" in front of all electric panels"
"Electrical rooms to have sign "Electrical Room""
The exact construction needed depends on what state codes are adopted. a day care that large is a place of assembly, that kids sleep there I'm sure makes things more restrictive, and handicapped and special needs children would need more time to evacuate in case of fire.
Might check international fire code/life and safety codes.
http://sfmd.az.gov/documents/2016/03/2015-ifc.pdf
jmo, but a standard drop tile ceiling straight into an open, wood framed attic is not anywhere near allowable in a building of that type and use. Is the attic/building sprinkled?