| 220 / | HD | RECEPTACLES |
| 600 | DF | END WALL STRUCTURE {8} |
| 604 | ![]() | .~ One-piece side and end wall {3} |
| 605 | DF | .~.~> With support structure {1} |
| 607 | DF | .~.~> End wall formed as a one-piece grid or mesh structure |
| 608 | DF | .~.~> Contoured end wall (e.g., curved, corrugated, ribbed, etc.) {1} |