WEIGHT ONE FOOT IN LENGTH OF SQUARE AND The great variety of thicknesses into which copper is manufactured causes the weight to be named whereby to determine the thickness required, the unit being that of a common sheet, so designated, viz., 4 feet by 2 feet, in lbs., thus: A 70-lb. plate is ths of an inch in thickness; 461 do. do.; 23 do. 8 9 10 11 12 13 14 15 WEIGHT OF ONE SQUARE FOOT OF SHEET IRON, ETC. Thickness by the Birmingham (Eng.) Wire Gauge. 1 2 3 4 Iron. Copper Brass 12.50 12.00 11.00 10.00 8.74 8.12 7.50 6.86 6.24 5.62 5.00 14.50 13.90 12.75 11.60 10.10 9.40 8.70 7.90 7.20 6.50 5.80 13.75 13.20 12.10 11.00 9.61 8.93. 8.25 7.54 6.86 6.18 5.50 4 38 3.75 3.12 2.82 5.08 4.34 3.60 3.27 4.81 4.12 3.43 3.10 2.50 2.18 1.86 1.70 1.54 1.40 1.25 1.12 1.00 .90 .80 2.90 2.52 2.15 1.97 1.78 1.62 1.45 1.30 1.16 1.04 .92 2.75 2.40 2.04 1.87 1.69 1.54 1.37 1.23 1.10 .99 .88 No. 1 Wire Gauge is ths of an inch; No. 4 is th; No. 11 is th: No. 13 is th; No. 15 is th; No. 16 is th; No. 17 is th; No. 19 is; No. 22 is 3. DIMENSIONS OF CYLINDRICAL COLUMNS OF CAST IRON TO SUSTAIN A PRESSURE WITH SAFETY. 10 2007 12 2119 2100 2077 2045 11 2570 2550 2520 2190 2450 2410 2358 2305 2248 2189 2127 3050 3040 3020 2970 2930 2900 2830 2780 2730 2670 2600 1964 1916 1865 1811 1755 1697 PRACTICAL UTILITY OF THE TABLE. Note. Wanting to support the front of a building with cast iron columns 18 feet in length, 8 inches in diameter, and the metal 1 inch in thickness, what weight may I confidently expect each column capable of supporting without tendency to deflection? Opposite 8 inches diameter and under 18 feet 1097. = 440. |