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52 Molesworth’s pocket-book
Weight and Strength of Rofes.
C — Circumference of rope in inches.
L = Working load of rope in tons.
S — Breaking strain „ „
W — Weight of rope in lbs. per fathom.
C = V L = C2&; S = O»; W = C«y; or = Lz.
fc
Table of Value of k, x, y, and z.
Description of Rope. k * V •
Common hemp Coir, hawser laid „ cable laid St. Petersburg tarred hemp, hawser ,, „ „ cable.. White Manilla, hawser „ „ cable Best hemp, “ cold register ” •. .. „ warm Iron wire rope Steel wire rope •032 •037 •025 •045 •033 •100 ■116 •290 •450 •18 •22 •15 • 27 •19 •60 •70 1-80 2-80 • 18 6- •131 — • 117 — •235 6-35 • 207 8’28 •177 3-93 • 155 4-70 —- — • 87 2-9 •89 1-91
Table of Working Strength of Ropes in Tons.
Circum. Inches. Hemp. Wire | Circum. । Inches. Hemp.
Common. Good. Iron. Steel. Common. Good.
1 •032 •046 ■29 •45 •578 •831
li •050 •072 •45 •70 •648 •932
li •072 •104 •65 1-01 •722 1-038
u •098 •141 •89 1-38 5 •800 1-150
2 •128 •184 1’16 1'80 5f •968 1-392
2i •162 '233 1-47 2-28 6 1'152 1’656
2* •200 •288 1-81 2’81 1-352 1-944
24 •242 •348 2-19 3-40 1 1-568 2-254
3 ■288 •414 2-61 4-05 1-800 2-588
3i ■338 •486 3’06 4-75 8 2-048 2-944
3; ■392 •564 3-55 5-51 2-312 3-324
34 •450 •647 4-08 6-33 9 2-592 3-726
— •512 •736 4’64 7-20 10 3-200 4-600