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OK ENGINEERING FORMULÆ
Stbength of Columns.
long columns. (Hodgkinson.)
W = Breaking weight in tons.
L = Length of column in feet.
D — External diameter of column in inches.
d = Internal diameter in inches.
Nature of | Both ends rounded Column. । when L exceeds 15 D. Both ends flat when L exceed« 30 D.
Solid cylin-1 1)3-76 dersofcast? W=14’9—— iron.. .. ' ■ Hollow cylin- D3-76—d8-76 ders of cast t W=13 iron.... J Solid square \ of Dantzic > .. .. oak (dry) ) Solid square, of red deal I .. . (dry) .. J s t- 1 4 8 IT g -1 2P 2 Ä12 xis r-l CO O rH - o ii n ii Ti ( >
Table of 3'6 and V7 Power.
No. 3-6 power- No. 3’6 power. No. 3*6 power.
3 52 10 3982 17 26892
4 147 11 5011 18 33035
5 328 12 7674 19 40133
6 632 13 10233 20 48273
1 1102 14 13367 21 57543
8 1783 15 17136 22 68033
9 2723 16 21619 24 93058
No. 11*7 power. | No. |l'7power. || No. [1-7 power. J No. 1'7 power.
5 15 15 100 25 23« 40 529
8 34 18 136 • 28 288 f 50 113
10 50 20 163 ■ 30 325
12 68 I 22 191 35 J 421