Turnable Treads Steel Gangway Ladder
Technical Parameters Table
| Number of Steps | Nominal Length L1 (m) | Selectable Height H (m) | Calculated Length L2 (m) | Length L (m) | B (m) | C (m) | D (≥m) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 12 | 3.6 | 3.6 | 4.995 | 555 | 260 | 350 | 705 | |
| 14 | 4.2 | 4.1 | 5.595 | 555 | 260 | 350 | 751 | |
| 16 | 4.8 | 4.6 | 6.195 | 555 | 260 | 350 | 797 | |
| 18 | 5.4 | 5.2 | 6.795 | 555 | 260 | 350 | 842 | |
| 20 | 6.0 | 5.6 | 7.395 | 555 | 260 | 350 | 890 | |
| 22 | 6.6 | 6.2 | 7.995 | 605 | 260 | 350 | 938 | |
| 24 | 7.2 | 6.6 | 8.595 | 605 | 260 | 350 | 987 | |
| (26) | 7.8 | 7.2 | 9.195 | 605 | 310 | 400 | 1144 | |
| 28 | 8.4 | 7.6 | 9.795 | 605 | 310 | 400 | 1203 | |
| (30) | 9.0 | 8.2 | 10.395 | 605 | 310 | 400 | 1262 | |
| 32 | 9.6 | 8.6 | 10.995 | 605 | 310 | 400 | 1383 | |
| (34) | 10.2 | 9.2 | 11.595 | 605 | 310 | 400 | 1445 | |
| 36 | 10.8 | 9.6 | 12.195 | 655 | 360 | 460 | 1589 | |
| (38) | 11.4 | 10.1 | 12.795 | 655 | 360 | 460 | 1653 | |
| 40 | 12.0 | 10.5 | 13.395 | 655 | 380 | 460 | 1807 | |
| 44 | 13.2 | 11.5 | 14.595 | 655 | 410 | 510 | 2031 | |
| 48 | 14.4 | 12.5 | 15.795 | 655 | 410 | 510 | 2260 |
Notes
- The number of steps includes the platform.
- The selectable height H refers to the distance from the upper platform to the water surface.
- The numbered step numbers in parentheses should be used as little as possible.
Diagram (description of the structure shown in the diagram)
The diagram shows the structure of the turnable treads steel gangway ladder, including the overall shape, the arrangement of steps, and the connection parts at both ends.
Parts List Table
| Part Name | Name | Material | Standard Number |
|---|---|---|---|
| Ladder frame straight beam | Ship’s carbon steel or similar steel | 2C | GB 712-80 |
| Platform, steps | Ordinary carbon steel | A3 | GB 700-79 |
| Handrails, columns, inclined rods | Welded steel pipe (galvanized) | A3.20 | YB 242-63 |
| Ladder pedals | Stainless steel (aluminum bronze can also be used) | GB 1220-80 (YB 458-71) | |
| Bottom rollers, side rollers | Rubber, carbon steel combination |
Marking Example
A 12-step turnable treads steel gangway ladder:
12 GB1391-87
Attention please: The description might be incorrect, please contact us for confirmation.
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