52 / | HD | STATIC STRUCTURES (E.G., BUILDINGS) |
633 | DF | OPENWORK; E.G., TRUSS, TRELLIS, GRILLE, SCREEN, FRAME, OR REBAR CHAIR {12} |
677 | .~ Spacer-positioner; e.g., rebar chair {5} | |
678 | DF | .~.~> Adjustable support |
679 | DF | .~.~> Penetrator with limiting stop {2} |
684 | DF | .~.~> Support member retaining means movable or deformable to final position {1} |
686 | DF | .~.~> Crossed supported member type |
687 | DF | .~.~> Plural feet or seat {2} |