52 / | HD | STATIC STRUCTURES (E.G., BUILDINGS) |
415 | DF | FACERS; E.G., MODULES, MUTUALLY BONDED BY INTERNAL SETTABLE MATERIAL SECTION {13} |
416 | .~ Lapped or bridger strip juncture-type surfacing {3} | |
417 | DF | .~.~> Dissimilar strip at juncture of facers |
418 | DF | .~.~> Embedded fastener |
419 | DF | .~.~> Material between superposed facers {1} |