Could I use plywood on this attic truss?

Leb21559257
by Leb21559257
Engineered Trusses 24” on-center (Fink, W)
All 2x4 chords
7/12 roof pitch
21’ wide
39’ long

Would like to put down a plywood floor in the middle, and drywall to make an “A” area storage space down the middle of attic. See picture.

Very light storage like decorations etc. but would also like a quite space to be able to hang up there regularly to read. No furniture just a rolling desk chair or something.

Want the center “A” area sealed so you would not be breathing insulation etc. So would want to seal all cracks, spackle and paint.

There are walls that run in different spans below this center area.

Is this possible? Would this require any reinforcement and are there any risks?

icon