TABLE of the Ultimate Breaking Weight, in tons, of cast-iron pillars. Note.-Example. Find the breaking weight of a cast-iron pillar whose external diameter is 17, and internal diameter 15 inches, and length 18 feet. TABLE of the Ultimate Breaking Weight, in tons, of cast-iron pillars.) Along the line marked 18 feet, and in the vertical lines numbered 17 and 15 inches, take the numbers 8751 and 5577; the difference of which, namely 3174, will be the breaking TABLE of the Ultimate Breaking Weight, in tons, of cast-iron Pillars. tons. tons. tons. tons. tons. 137865 tons. 1777940 2138510 2549140 3013880 3536910 4122530 892404 1073380 1279490 1512760 1775280 2069230 547224 658204 784589 927630 1088610 1268880 374471 450416 536902 634786 744947 868292 274670 330374 393810 465605 546499 636880 211350 254212 303024 358269 420444 490059 168428 202586 241485 285511 165825 197666 335059 390543 233703 274260 319671 115257 138632 165251 195378 229286 267248 weight in tons. For practical purposes the pillars should be calculated to bear one half more than the weight to which they are subjected. TABLE OF STRENGTHS OF CAST-IRON SHAFTS. The cube of the diameter of a journal or shaft of sufficient strength is directly as the horse power, and inversely as the number of revolutions of the shaft per minute. Mr. Robertson Buchanan deduced from several experiments that a journal suitable to a 50-horse engine, making 50 revolutions per minute, should be 74 inches in diameter. It is from these data the following table has been computed. 46778 46666 67 6 50 12 11 10 83 61 61 5층 5층 9 100 15 13 12 11 11 10 10 98 125 17 15 13 12 11 11 104 108 10 150 18 15 14 13 12 12 11 11 108 101 10 94 9 81 in. in. in. in. in. in. in. in. in. in. 55 818 8481 38 34 3 3 4급 4 4층 4급 4급 4용 51 ม 58 in. in. 31 |