Weight per Resistance in lbs. per Kind. cubic foot square inch. Value of s. in pounds. Extension Compression.
White Pine. 26 12,000 6000 1229 Yellow Pine. 31 12,000 6000 1185 Pitch Pine. 46 12,000 6000 1727 Red Pine. 35 12,000 6000 1527 Virginia Pine. 37 12,000 6000 1456 Spruce. 48 12,000 6000 1036 Tamarack. 26 12,000 6000 907 Canada Balsam. 34 12,000 6000 1123 White Oak. 48 15,000 7500 1743 Red Oak. 41 15,000 7600 1687 Birch. 44 15,000 7000 1928 Ash. 38 16,000 8100 1795 Hickory. 51 15,000 7200 2129 Elm. 45 16,000 8011 1970
The above table is compiled from a much fuller one in Vose's Treatise on R.R. Construction.
TABLE OF BOLTS AND NUTS CALCULATED FOR A WORKING STRAIN OF 15,000 LBS. PER SQUARE INCH OF SECTION.
Diameter. Area. Strength in Weight per Thick's No. thr's Inches. Sq. inches. Pounds Foot. Square nut. of nut. per inch.
1/2 .19635 2940 0.66 1-1/4 in 3/4 in 12 5/8 .30680 4602 1.03 1-3/8 3/4 10 3/4 .44179 6630 1.49 1-1/2 7/8 10 7/8 .60132 9019 2.03 1-3/4 1 9 1 .78540 11775 2.65 2 1 8 1-1/8 .99402 14910 3.36 2 1-1/8 7 1-1/4 1.2272 18405 4.17 2-1/4 1-1/4 7 1-3/8 1.4849 22260 5.02 2-1/2 1-3/8 6 1-1/2 1.7671 25505 5.97 2-3/4 1-1/2 6 1-5/8 2.0739 31095 7.01 2-7/8 1-5/8 5 1-3/4 2.4053 36075 8.13 3 1-3/4 5 1-7/8 2.7612 41415 9.33 3-1/4 1-7/8 4-1/2 2 3.1416 47130 10.62 3-1/2 2 4-1/2 2-1/8 3.5166 53190 12.00 3-3/4 2-1/8 4 2-1/4 3.9761 59640 13.40 4 2-1/4 4 2-3/8 4.4301 66450 15.00 4-1/8 2-3/8 4 2-1/2 4.9087 73620 16.70 4-1/4 2-1/2 3-1/2 2-5/8 5.4119 81178 18.20 4-1/2 2-5/8 3-1/2 2-3/4 5.9396 89094 20.00 4-3/4 2-3/4 3-1/2 2-7/8 6.4918 97377 21.90 5 2-7/8 3 3 7.0686 106029 23.80 5-1/4 3 3 3-1/4 8.2958 124437 27.90 5-3/4 3-1/4 3 3-1/2 9.6211 144316 32.40 6 3-1/2 2-1/2
TABLE OF SAFE WORKING LOAD IN LBS., FOR HOLLOW CAST-IRON COLUMNS.
Outside Length or height in Feet Metal Diameter Thickness in inches. 6 8 10 12 15 18 20 in inches.
3 16000 14000 13000 11000 9000 7000 6000 3/8 4 30000 29000 26000 24000 22000 18000 16000 1/2 5 50000 37000 45000 42000 39000 37000 31000 5/8 6 59000 57000 55000 52000 49000 44000 41000 3/4 7 101000 99000 96000 92000 88000 81000 76000 13/16 8 131000 129000 126000 122000 118000 109000 105000 7/8 9 169000 167000 164000 160000 156000 146000 141000 1 10 210000 200000 200000 200000 190000 180000 180000 1-1/8 11 250000 250000 240000 240000 240000 230000 220000 1-1/4 12 300000 300000 290000 290000 290000 270000 270000 1-1/2 14 450000 430000 410000 380000 370000 350000 330000 1-3/4 16 520000 500000 480000 460000 440000 420000 400000 2 18 650000 630000 610000 590000 560000 520000 470000 2-1/2 20 800000 760000 740000 690009 650000 590000 540000 3