The following two tables contain the maximum permissible load to be carried by screwed iron or steel stays: PERMISSIBLE WORKING LOADS OF Iron STAYS WITH A STRESS OF 3,879 1층 : 6,958 7 4,880 6,262 ... ... 1 3,879 4,045 4,180 4,293 4,387 4,880 5,120 5,310 5,465 5,594 5,701 6,262 6,532 6,747 6,921 7,065 7,186 7,419 7,419 7,813 8,116 8,355 8,549 8,710 8,844 9,102 9,102 9,539 9,871 10,136 10,349 10,526 10,673 10,303 10,956 11,435 11,800 12,086 12,321 12,514 12,674 12,271 12,983 13,503 13,899 14,212 14,464 14,673 14,847 13,910 15,181 15,743 16,170 16,508 16,779 17,004 17,191 16,182 17,550 18,154 18,614 18,976 19,266 19,508 19,707 18,623 20,092 20,738 21,228 21,616 21,925 22,182 22,396 20,479 22,806 23,493 24,016 24,426 24,756 25,028 25,255 23,217 25,698 26,421 26,973 27,408 27,758 28,048 28,287 | 26,127 28,748 29,520 30,103 30,564 30,932 31,238 31,491 29,210 31,976 32,791 33,406, 33,888 34,279 34,601 34,866 32,464 35,377 36,233 36,880 37,361 37,796 38,135 38,413 34,616 38,950 39,848 40,526 41,059 41,487 41,840 42,131 ... 38,149 42,694 43,634 44,344 44,900 45,347 45,718 46,022 46,611 47,592 48,334 48,914 49,380 49,768 50,085 44,844 50,697 51,719 52,494 53,100 53,586 53,990 54,321 54,958 56,023 56,826 57,457 57,963 58,481 58,726 53,038 59,389 60,496 61,332 61,986 62,513 62,946 63,304 63,993 65,143 66,006 66,688 67,234 67,684 68,060 60,722 68,768 69,960 70,854 71,560 72,125 72,592 72,986 73,713 74,950 75,874 76,605 77,189 77,672 78,069 70,192 78,834 80,111 81,067 81,823 82,425 82,924 83,340 PERMISSIBLE WORKING LOADS OF Steel STAYS WITH A STRESS OF 9,000 LBS. PER SQUARE INCH. FOR DIAMETERS AND SECTIONS SEE PP. 331, 332. 6,275 6,275 8,051 6,581 6,827 7,026 7,192 7,330 8,051 8,398) 8,675 8,898 9,085 9,240 9,539 9,539 10,047 10,435 10,742 10,992 11,199 11,371 11,703 11,703 12,264 12,692, 13,032 13,306 13,533 13,723 13,247 14,087 14,702 15,171 15,541 15,841 16,089, 16,295 15,777 16,692 17,361 17,870 18,273 18,596 18,866 19,089 17,884 19,518, 20,241 20,790 21,225 21,573 21,863 22,103, 20,805 22,568 23,341 23,932 24,397, 24,772 25,081 25,338, 23,942 25,833 26,663 27,293 27,790 28,190 28,520 28,795 26,330 29,322 30,206 30,874 31,405 31,829 32,180 32,471 29,850 33,032 33,970 34,680 35,239 35,689 36,006 36,369 33,590 36,962 37,955 38,704 39,295 39,770 40,163 40,488 37,560 41,112 42,160 42,951 43,573 44,073 44,487 44,828 41,739 45,485 46,586 47,417 48,067 48,595 49,031 49,389 44,506 50,079 51,233 52,105 52,780 53,340 53,794 54,169 49,049 54,893 56,101 57,003 57,729 58,303 58,781 59,171 53,801 59,928 61,190 62,143 62,889 63,490 63,987 64,395 57,657 65,182 66,498 67,492 68,271 68,896 69,415 69,842 62,814 70,660 72,030 73,062 73,874 74,524 75,061 75,505 68,192 76,353 77,791 78,855 79,700 80,374 80,930 81,391 73,793 82,276, 83,755 84,865 85,742 86,444 87,023 87,493 78,171 88,416, 89,948 91,098 92,006 92,732 93,333 93,824 84,056 94,774 96,364 97,550 98,490 99,243 99,864 100,374 90,260 101,354 102,997 104,229 105,201 105,975 106,614 107,145 1 395 INDEX Abbreviations: B. T. = Board of Trade. L. R. = Lloyd's Register. Water-level errors, 20 Accidents Explosions, 225 Leaky tubes, 33 Personal, from flames, 19 To tubes, 295 To tube plates, 45 Acid steel, 136, 137 Acids in boilers, 69, 70 influence on steel, 150 Adamson's furnace, strength of, 205, 208, rules and tables, 337, 341, 345, After-strain, 157 Air, admission to furnaces, 9, 12, 15, 94, expansion of, 97 for combustion, 4, 5, 6, 17, 94, 101, 102 in steam space, 2 in water, 60, 72, 73, 78, 151 in water absorption speed, 61 pressure gauges, 103 specific gravity of, 107 Alarms, low water, 22 Alkalies, use of, 29, 68, 72 Alternate bending tests (fatigue), 26, 42, heating and cooling, 18, 24 General, 26, 35, 38, 42, 153, 247, 255, 260, 264-268, 274 Flange corners in place, 279 cause corrosion, 37, 43, 46 |