| 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} |