architecture - engineering - construction
For other relevant searches, you might want to try: form boards, reinforcement, and support members when part of an assembly; poured and prefabricated cast floor and roof decks and fill.
(03 34 00) Low Density Concrete
(03 41 00) Precast Structural Concrete
(07 22 13) Asphaltic Perlite Concrete Deck
(03500) Cementitious Decks and Underlayment