Project Description
ISO13713 Mooring Chocks Type A Deck Mounted

Product Overview:
The ISO13713 mooring chock is a high-strength cast steel deck-mounted chock, manufactured per ISO13713. Installed on the shipside, it safely guides mooring ropes from inboard to outboard with low friction, reducing rope wear and tension loss.
Key Specifications:
- Standard: ISO13713 Type A – Deck Mounted
- Material: High-strength cast steel
- SWL Range: 353kN to 1373kN (36 to 140 metric tons)
- Nominal Size Range: 250×200mm to 500×250mm
- Application: Synthetic fiber ropes (nylon, polyester, etc.)
- Mounting Position: Shipside (deck mounted)
Technical Dimensions – ISO 13713 Type A Mooring Chock
**The table below provides standard dimensions and SWL ratings per ISO 13713. Contact us for custom sizes or higher SWL requirements.

| Nominal size | SWL | Dimension(mm) | Weight | ||||||
|---|---|---|---|---|---|---|---|---|---|
| L x H (mm) | (kn) | (t) | l1 | l2 | l3 | B | H1 | H2 | (kg) |
| 250 X 200 | 353 | 36 | 100 | 250 | 444 | 160 | 377 | 80 | 73 |
| 300 X 250 | 491 | 50 | 110 | 300 | 536 | 200 | 468 | 100 | 121 |
| 350 X 250 | 589 | 60 | 125 | 350 | 608 | 220 | 489 | 110 | 151 |
| 400 X 250 | 736 | 75 | 135 | 400 | 682 | 240 | 511 | 120 | 200 |
| 450 X 250A | 981 | 100 | 150 | 450 | 760 | 260 | 535 | 130 | 280 |
| 500 X 250A | 1128 | 115 | 175 | 500 | 832 | 280 | 556 | 140 | 338 |
| 500B X 250B | 1373 | 140 | 175 | 500 | 840 | 280 | 560 | 140 | 396 |
Materials & Finishes:
Our ISO13713 mooring chocks are manufactured from high-grade cast steel. Standard finish is as-cast. Optional finishes available upon request:
– Primer painting
– Hot-dip galvanizing for enhanced corrosion resistance
*Certification and material test reports are available upon request.
Applications:
ISO13713 Type A mooring chocks are widely used on:
– Commercial vessels (cargo ships, tankers, bulk carriers)
– Container ships
– Offshore support vessels
– Naval ships
– Tugboats and workboats