52 / | HD | STATIC STRUCTURES (E.G., BUILDINGS) |
415 | DF | FACERS; E.G., MODULES, MUTUALLY BONDED BY INTERNAL SETTABLE MATERIAL SECTION {13} |
416 | DF | .~ Lapped or bridger strip juncture-type surfacing {3} |
419 | DF | .~.~ Material between superposed facers {1} |
420 | .~.~.~ Partial section; e.g., adhesive edge strip |