SAFE WORKING STRAIN FOR FIELD SERVICE, AND WEIGHT IN FATHOMS.
| Circumference. | Wire Ropes Hawser-laid. | Round-link Crane-chain, Length of Link not Exceeding Five Diameters of the Iron. | ||||
| Iron. Safe Working Strain. | Steel. Safe Working Strain. | Weight per Fathom. | Diameter of Iron of Link. | Safe Working Strain. | Weight per Fathom. | |
| Inches. | Cwts. | Cwts. | Lbs. | Inches. | Cwts. | Lbs. |
| ¾ | -- | -- | -- | 3/16 | 8 | 2.1 |
| 1 | 10 | -- | 0.94 | ¼ | 15 | 4.88 |
| 1¼ | 13½ | -- | 1.5 | 5/16 | 22 | 7.26 |
| 1½ | 21½ | 62½ | 2.5 | ⅜ | 32 | 10.57 |
| 2 | 40 | 112 | 3.5 | 7/16 | 45 | 13.0 |
| 2¼ | 50 | -- | 4.5 | ½ | 65 | 16.0 |
| 2½ | 60 | 195 | 5.75 | 9/16 | 75 | 21.0 |
| 2¾ | 77 | -- | 6.5 | ⅝ | 92 | 25.0 |
| 3 | 92 | 245 | 7.5 | 11/16 | 112 | 29.0 |
| 3¼ | 109 | -- | 8.5 | ¾ | 135 | 36.0 |
| 3½ | 125 | 275 | 10.75 | 13/16 | 157 | 43.0 |
| 4 | 157½ | 450 | 13.25 | ⅞ | 182 | 46.5 |
| 4½ | 210 | 545 | 17.75 | 15/16 | 210 | 58.0 |
| 5 | 248 | 669 | 21.5 | 1 | 240 | 63.5 |