CAST STEEL ROPE
Composed of 6 strands and a hemp center, 19 wires to the strand
| Diam. of Rope in Inches | Approximate Circumference in Inches | Approx. Breaking Strain in Tons of 2000 lbs. | Proper Working Load in Tons of 2000 lbs. | Minimum Size of Drum or Sheave in ft. |
|---|---|---|---|---|
| 2 3⁄4 | 8 5⁄8 | 211 | 42.2 | 11 |
| 2 1⁄2 | 7 7⁄8 | 170 | 34 | 10 |
| 2 1⁄4 | 7 1⁄8 | 133 | 26.6 | 9 |
| 2 | 6 1⁄4 | 106 | 21.2 | 8 |
| 1 7⁄8 | 5 3⁄4 | 96 | 19 | 8 |
| 1 3⁄4 | 5 1⁄2 | 85 | 17 | 7 |
| 1 5⁄8 | 5 | 72 | 14.4 | 6 1⁄2 |
| 1 1⁄2 | 4 3⁄4 | 64 | 12.8 | 6 |
| 1 3⁄8 | 4 1⁄4 | 56 | 11.2 | 5 1⁄2 |
| 1 1⁄4 | 4 | 47 | 9.4 | 5 |
| 1 1⁄8 | 3 1⁄2 | 38 | 7.6 | 4 1⁄2 |
| 1 | 3 | 30 | 6 | 4 |
| 7⁄8 | 2 3⁄4 | 23 | 4.6 | 3 1⁄2 |
| 3⁄4 | 2 1⁄4 | 17.5 | 3.5 | 3 |
| 5⁄8 | 2 | 12.5 | 2.5 | 2 1⁄2 |
| 9⁄16 | 1 3⁄4 | 10 | 2 | 2 1⁄4 |
| 1⁄2 | 1 1⁄2 | 8.4 | 1.68 | 2 |
| 7⁄16 | 1 1⁄4 | 6.5 | 1.30 | 1 3⁄4 |
| 3⁄8 | 1 1⁄8 | 4.8 | .96 | 1 1⁄2 |
| 5⁄16 | 1 | 3.1 | .62 | 1 1⁄4 |
| 1⁄4 | 3⁄4 | 2.2 | .44 | 1 |
CAST STEEL ROPE
Composed of 6 strands and a hemp center, 37 wires to the strand
| Diameter in Inches | Approximate Circumference in Inches | Approx. Breaking Strain in Tons of 2000 lbs. | Proper Working Load in Tons of 2000 lbs. | Minimum Size of Drum or Sheave in ft. |
|---|---|---|---|---|
| 2 3⁄4 | 8 5⁄8 | 200 | 40 | |
| 2 1⁄2 | 7 7⁄8 | 160 | 32 | |
| 2 1⁄4 | 7 1⁄8 | 125 | 25 | |
| 2 | 6 1⁄4 | 105 | 21 | |
| 1 3⁄4 | 5 1⁄2 | 84 | 17 | |
| 1 5⁄8 | 5 | 71 | 14 | |
| 1 1⁄2 | 4 3⁄4 | 63 | 12 | 3 3⁄4 |
| 1 3⁄8 | 4 1⁄4 | 55 | 11 | 3 1⁄2 |
| 1 1⁄4 | 4 | 45 | 9 | 3 1⁄4 |
| 1 1⁄8 | 3 1⁄2 | 34 | 6.8 | 2 3⁄4 |
| 1 | 3 | 29 | 5.8 | 2 1⁄2 |
| 7⁄8 | 2 3⁄4 | 23 | 4.6 | 2 1⁄4 |
| 3⁄4 | 2 1⁄4 | 17.5 | 3.5 | 1 3⁄4 |
| 5⁄8 | 2 | 11.2 | 2.2 | 1 3⁄4 |
| 9⁄16 | 1 3⁄4 | 9.5 | 1.9 | 1 1⁄2 |
| 1⁄2 | 1 1⁄2 | 7.25 | 1.45 | 1 1⁄4 |
| 7⁄16 | 1 1⁄4 | 5.50 | 1.10 | 1 1⁄4 |
| 3⁄8 | 1 1⁄8 | 4.20 | .84 | 1 |
CAST STEEL ROPES FOR INCLINES
Six strands of 7 wires each—hemp center
| Diam. of Rope in Inches | Diam. of Sheaves or Drums in Feet, Showing Percentage of Life for Various Diams. | ||||||
|---|---|---|---|---|---|---|---|
| 100 % | 90 % | 80 % | 75 % | 60 % | 50 % | 25 % | |
| 1 1⁄2 | 16 | 14 | 12 | 11 | 9 | 7 | 4.75 |
| 1 3⁄8 | 14 | 12 | 10 | 8.5 | 7 | 6 | 4.5 |
| 1 1⁄4 | 12 | 10 | 8 | 7.25 | 6 | 5.5 | 4.25 |
| 1 1⁄8 | 10 | 8.5 | 7.75 | 7 | 6 | 5 | 4 |
| 1 | 8.5 | 7.75 | 6.75 | 6 | 5 | 4.5 | 3.75 |
| 7⁄8 | 7.75 | 7 | 6.25 | 5.75 | 4.5 | 3.75 | 3.2 |
| 3⁄4 | 7 | 6.25 | 5.5 | 5 | 4.25 | 3.5 | 2.75 |
| 5⁄8 | 6 | 5.25 | 4.5 | 4 | 3.25 | 3 | 2.5 |
| 1⁄2 | 5 | 4.5 | 4 | 3.5 | 2.75 | 2 | 1.75 |