| 182 / | HD | FIRE ESCAPE, LADDER, OR SCAFFOLD |
| 179.1 | DF | SELF-SUSTAINING {5} |
| 181.1 | ![]() | .~ Scaffold horse (e.g., trestle) {7} |
| 182.1 | DF | .~.~> Having height adjustable beam {3} |
| 183.1 | DF | .~.~> Having longitudinally extensible beam |
| 185.1 | DF | .~.~> Having unitary leg to beam coupler and brace |
| 186.1 | DF | .~.~> Beam clamped by leg actuation {1} |
| 186.3 | DF | .~.~> Having leg to beam attaching bracket |
| 186.4 | DF | .~.~> Leg coupled directly to beam |
| 186.5 | DF | .~.~> Knockdown |