| 52 / | HD | STATIC STRUCTURES (E.G., BUILDINGS) |
| 319 | DF | CAST IN SITU CONCRETE BARRIER WITH LATERALLY PROJECTING RIB-TYPE SUSTAINER {8} |
| 327 | DF | .~ Additional distinct coextensive section fixed to barrier or sustainer {5} |
| 333 | ![]() | .~.~ Sustainer anchored within section |