Regulation 51
(1)
The adjusting holes in weights made of iron other than those of the flat-circular type, shall be rectangular or circular, and shall not be greater in area than the area of a rectangle of the following approximate dimensions:—
| Purported value of weight | Length | Width | Approximate minimum distance of lead from surface when new |
|---|---|---|---|
| inches | inches | inches | |
| 56 pounds | 2½ | 1¼ | 1¼ |
| 50 pounds | 2½ | 1¼ | 1¼ |
| 28 Pounds | 2 | 1 | 1 |
| 20 Pounds | 1½ | ¾ | ¾ |
| 14 pounds | 1¼ | ⅝ | ⅝ |
| 10 pounds | 1 | ½ | ½ |
| 7 pounds | 1 | ½ | ½ |
| 5 pounds | ¾ | ½ | ½ |
| 4 pounds | ¾ | ½ | ½ |
| 2 pounds | ⅝ | ½ | ½ |
| 1 pounds | ⅝ | ½ | ½ |
| 8 ounces | ⅝ | ⅜ | ¼ |
| 4 ounces | ½ | ¼ |
(2)
The minimum distance of the lead (when new) from the surface of the weight shall correspond approximately to that specified in the fourth column of the foregoing table.