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MOLESWORTH S POCKET-BOOK
Safe Load on Chains.
D = Diameter in eighths of an inch.
W = Safe load in tons.
d = Vsw.
D2
W = •—■ = 7'111 d« where
9 ’
d — Diameter of iron in inches.
Table of Wobking Load or Chains.
Diaru. ins. luoa .. i •44 ■70 8 1-0 7 16 1*36 1-78 190 2-25 i 2'78 i a 3’36 I 4-0
Diam. ins. Load .. 4’69 5*44 14 6’25 1 ?-ll u 9 11 11-11 is X8 13’44 16-Ü 21 • 7Ö
Messrs. Brown, Lhnnox, and Co.’s Chain Cable.
Tonnage of Ship. Diam. of Cable. Length of Cable. Average Weight per Fathom. Proof Strain of Stud Chain Cable. Weight of Anchor. Approved equivalent Circum- ference of Rope.
tons. inches. fathoms. lbs. tons. cwts. inches.
25 i 120 2 4f
35 _9_ IO 120 17 5| 2f 5|
45 8 .120 21 7 2} 6i
50 XX 120 25 Si 3 7
75 I 120 30 10J 3$ U
100 .13. 150 35 5 8|
150 2.5 3 80 48 — U 10
175 1 180 54 18 9 lot
250 210 68 22} 12* 12
350 U 240 84 281 ]7 13$ 15
450 If 270 102 34: 21
600 u 270 122 40* 26 16
800 If 300 143 32 17f
1000 u 300 166 551 38 18£
1400 If 300 191 63| 43
1800 2 300 217 72 48
2500 2| 330 244 81* 53
3000 2| 360 268 91J 57 —