52 / | HD | STATIC STRUCTURES (E.G., BUILDINGS) |
272 | DF | INTERSECTION OF WALL TO FLOOR, CEILING, ROOF, OR ANOTHER WALL (I.E., TWO-WAY CORNER CONSTRUCTION) {8} |
281 | .~ Sustainer coextensive with junction of panels or modules {1} | |
282.1 | DF | .~.~> Exposed sustainer {3} |