This section is from the book "The English And American Mechanic", by B. Frank Van Cleve. Also available from Amazon: The English And American Mechanic.
Width of Iron. | Thick, ¼ in. | Thick, 3/8 in. | Thick, ½ in. | Thick, 5/8 in. | Thick, ¾ in. | Thick, 7/8 in. | Thick, 1 inch. |
Inches. | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. | lbs. |
2 | 1.56 | 2.34 | 3.12 | 3.90 | 4.68 | 5.46 | 6.25 |
2¼ | 1.75 | 2.63 | 3.51 | 4.39 | 5.27 | 6.15 | 7.03 |
2½ | 1.95 | 2.92 | 3.90 | 188 | 5.85 | 6.83 | 7.81 |
2¾ | 2.14 | 3.22 | 4.29 | 5.37 | 6.44 | 7.51 | 8.59 |
3 | 2.34 | 3.51 | 168 | 5.85 | 7.03 | 8.20 | 9.37 |
3¼ | 2.53 | 3.80 | 5.07 | 6.34 | 7.61 | 8.88 | 10.15 |
3½ | 2.73 | 4.10 | 5.46 | 6.83 | 8.20 | 9.57 | 10.93 |
3¾ | 2.93 | 4.39 | 5.85 | 7.32 | 8.78 | 10.25 | 11.71 |
4 | 3.12 | 4.6S | 6.25 | 7.81 | 9.37 | 10.93 | 12.50 |
4¼ | 3.32 | 4.97 | 6.64 | 8.30 | 9.96 | 11.62 | 13.28 |
4½ | 351 | 5.27 | 7.03 | 8.78 | 10.54 | 12.30 | 14.06 |
4¾ | 3.71 | 5.56 | 7.42 | 9.27 | 11.13 | 12.98 | 14.84 |
5 | 3.90 | 5.86 | 7.81 | 9.76 | 11.71 | 13.67 | 15.62 |
5¼ | 4.10 | 6.15 | 8.20 | 10.25 | 12.30 | 14.35 | 16.40 |
5½ | 4.29 | 6.44 | 8.59 | 10.74 | 12.89 | 15.03 | 17.18 |
5¾ | 4.49 | 6.73 | 8.98 | 11.23 | 13.46 | 15.72 | 17.96 |
6 | 4.68 | 7.03 | 9.37 | 11.71 | 14.06 | 16.40 | 18.75 |
 
Continue to: