52 / | HD | STATIC STRUCTURES (E.G., BUILDINGS) |
578 | DF | MODULE OR PANEL HAVING DISCRETE EDGEWISE OR FACE-TO-FACE CONNECTING FEATURE {6} |
582.1 | DF | .~ With joining means of dissimilar material and separate from unit {6} |
583.1 | .~.~ Connecting protruding ends of units' reinforcement (e.g., rebar) |