CAST STEEL ROPE

Composed of 6 strands and a hemp center, 7 wires to the strand

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│ │ Approx. │ Proper │ Minimum

Diameter │ Approximate │ Breaking │ Working │ Size of

in │ Circumference │ Strain in │ Load in │ Drum or

Inches │ in Inches │ Tons of │ Tons of │ Sheave

│ │ 2000 lbs. │ 2000 lbs.│ in ft.

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1-1/2 │ 4-3/4 │ 63 │ 12.6 │ 11

1-3/8 │ 4-1/4 │ 53 │ 10.6 │ 10

1-1/4 │ 4 │ 46 │ 9.2 │ 9

1-1/8 │ 3-1/2 │ 37 │ 7.4 │ 8

1 │ 3 │ 31 │ 6.2 │ 7

7/8 │ 2-3/4 │ 24 │ 4.8 │ 6

3/4 │ 2-1/4 │ 18.6 │ 3.7 │ 5

11/16 │ 2-1/8 │ 15.4 │ 3.1 │ 4-3/4

5/8 │ 2 │ 13 │ 2.6 │ 4-1/2

9/16 │ 1-3/4 │ 10 │ 2 │ 4

1/2 │ 1-1/2 │ 7.7 │ 1.54 │ 3-1/2

7/16 │ 1-1/4 │ 5.5 │ 1.10 │ 3

3/8 │ 1-1/8 │ 4.6 │ .92 │ 2-3/4

5/16 │ 1 │ 3.5 │ .70 │ 2-1/4

9/32 │ 7/8 │ 2.5 │ .50 │ 1-3/4

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The Use of Ropes and Tackle · 第 31 / 57 题