| 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} |
| 586.1 | ![]() | .~.~ Tie along and within edge or face groove; e.g., spline {1} |
| 586.2 | DF | .~.~.~> Spline having particular shape (bone, arrow, dovetail, etc.) |