This section is from the book "Practical Sheet And Plate Metal Work", by Evan A. Atkins. Also available from Amazon: Practical Sheet And Plate Metal Work.
W. G. Number | In lbs. per sq foot. | Copper In lbs. per sq. foot. | Brass In lbs. per sq. foot. |
1 | 12½ | 14 | 13½ |
2 | 11 | 13 | 12½ |
3 | 10½ | 12 | 11½ |
4 | 9½ | 11 | 10½ |
5 | 8¾ | 10⅛ | 9⅝ |
6 | 8 | 94 | 9 |
7 | 7½ | 8½ | 8 |
8 | 6 | 7⅝ | 7⅛ |
9 | 6¼ | 7 | 6½ |
10 | 5⅝ | 6¼ | 5¾ |
11 | 5 | 5½ | 5 |
12 | 4½ | 5 | 4⅝ |
13 | 3⅝ | 4½ | 4¼ |
14 | 3 5/16 | 4 | 3¾ |
15 | 3 | 3½ | 3¼ |
16 | 2½ | 3 | 2⅞ |
17 | 2¼ | 2¾ | 2⅝ |
18 | 2 | 2¼ | 2⅛ |
19 | 1¾ | 2 | l⅞ |
20 | 1½ | 1¾ | l¾ |
21 | 1 3/8 | 1½ | 1½ |
22 | 1¼ | 1 3/8 | 1 3/8 |
23 | 1⅛ | 1 3/16 | 1 3/16 |
24 | 1 | 1 | 1 |
25 | 0⅞ | 0⅞ | 0⅞ |
26 | 0¾ | 0 15/16 | 0½ 3/6 |
27 | 0 11/16 | 0¾ | 0¾ |
28 | 0⅝ | 0⅝ | 0⅝ |
29 | 0 9/16 | 0 9/16 | 0 9/16 |
30 | 0½ | 0½ |
 
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