. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. ntre of rope ; if wire coresweight will be about one-seventh more. MAINTENANCE OF ROPEWAYS AND SPLICING OF ROPES. 531 Flat Wire Ropes. Plough Steel. Patent Steel. Iron. Weight Breadth. Fathom. Breaking Working Breaking Working Breaking Working Strain. Load. Strain. Load. Srain. Load. inches. lb. tons. cwt. tons. cwt. tons. cwt. •7i X i 12 47 94 32 64 16 32 24 X f 14 54 108 38 76 18 36 3 >< * 16 74 148 50 100 23 46 3i X 1 18 81 162 56 112 25 50 3 X f 20 93 186 61 122 30 60
. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. ntre of rope ; if wire coresweight will be about one-seventh more. MAINTENANCE OF ROPEWAYS AND SPLICING OF ROPES. 531 Flat Wire Ropes. Plough Steel. Patent Steel. Iron. Weight Breadth. Fathom. Breaking Working Breaking Working Breaking Working Strain. Load. Strain. Load. Srain. Load. inches. lb. tons. cwt. tons. cwt. tons. cwt. •7i X i 12 47 94 32 64 16 32 24 X f 14 54 108 38 76 18 36 3 >< * 16 74 148 50 100 23 46 3i X 1 18 81 162 56 112 25 50 3 X f 20 93 186 61 122 30 60 3f X H 23 III 222 72 144 32 64 4 X H 25 120 240 83 166 36 72 4i X f 29 126 252 90 180 44 88 4M f 31 140 280 102 204 53 106 4f X f 34 148 296 106 212 61 122 5 X i 37 160 320 no 220 69 138 5o X iij 38 163 326 119 238 70 140 6 X I 40 168 336 120 240 75 150 The above weights are for hemp cores in strand and centre of rope ; if wire coresweight will be about one-seventh more. Flat ropes are frequently preferred for hoisting purposes, as, owingto their being coiled one layer above the other on the winding drum, the. o b a 4 s 6 Fig. 362.—Splicing Wire Rope. motion of the engine is balanced; the one drum being of small diameterwhen the heaviest weight of the rope is upon it, and the other of large ■+
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