| Work stage assy. incl. fig nos 20-24 |
| Stair rail section |
| Ascent segment |
| Retainer |
| Lock washer |
| Retainer |
| Retainer |
| Half clamp |
| Cover plate |
| Bolt |
| Locking plate |
| Half clamp |
| Weld on plate |
| Half clamp |
| Cover plate |
| Bolt |
| Work stage |
| Threaded block |
| Handle |
| Bolt |
| Grating |
| Terminal strip assy. |
| Plate |