52 / | HD | STATIC STRUCTURES (E.G., BUILDINGS) |
309.1 | DF | WITH SYNTHETIC RESINOUS COMPONENT {4} |
309.13 | .~ With nonresinous component {4} | |
309.14 | DF | .~.~> Exterior faces |
309.15 | DF | .~.~> Core |
309.16 | DF | .~.~> Embedded, elongated component |
309.17 | DF | .~.~> Cementitious material |