Side
af
764
Forrige
Næste
53
OF ENGINEERING FOBMULÆ.
Table of Weight of Ropes in lbs. per Fathom.
Circum. Inches. Hemp. Wire. Circum. Inches. Hemp.
Common. Good. Iron. 1 Steel. Common. Good.
1 •18 •24 •87 •89 i 4i 3-25 4-34
li •28 •38 1-36 1-39 4} 3-65 4-86
u •41 .•54 1-96 2-00 4J 4-06 5-42
•55 ■74 2-66 2-731 5 4-50 6-00
2 •72 •96 3-48 3-561 5i 5-45 7'26
2i •91 1-22 4-40 4-51 6 6-48 8-64
2i 1-13 1*50 5-44 5-56 64 7-61 10-14
24 1-36 1-82 6-58 6-73 7 8-82 11-76
3 1-62 2-16 7'83 8-01 U 10-13 13-50
3i 1-90 2-54 9-19 9-40 8 11-52 15*36
3i 2-21 2-94 10-66 10-90 8i 13-05 17'34
3t 2’53 3’38 12-23 12-52 9 14-58 19-44
4 2'88 3'84 13'92 U-24 10 18-00 24-00
Weight and Strength ok Flat Ropes of Hemp and Wire.
Hemp. Iron Wire.
Size in inches. Lbs. weight per fathom. Size in inches. Lbs. weight per fathom.
4 Xll 20 2iX i 11
5 XH 24 2|X i 13
5iXlf 26 2iX 1 15
5JXH 28 3 X f 16
6 XH 30 34X I 18
’ Xl| 36 3*X f 20
8iX2J 40 3|X]J 22
8±X2i 45 i xii 25
9 X2f 50 4iX 4 28
9iX2f 55 4iX 1 32
10X2i 60 34
Steel Wire. Equivalent Strength.
Size in inches. Lbs. weight per fathom. Work- ing Load per cwt. Break- ing Strain per ton.
— — 44 20
—• •—• 52 23
—— * — 60 27
2 X i 10 64 28
2iX i 11 72 32
— —— 80 36
2£x ; 13 88 40
2fX J 15 100 45
3 X I 16 112 50
3iX | 18 123 56
3ix 4 20 136 60