“Dimension e is the distance from the edge of the plate to the centre of the rivet hole. Dimension v is the distance between the rows of rivets, dimension p is the pitch of the rivets, which is always measured from centre to centre of the rivets, and dimension pd is the diagonal pitch of the rivets.
“The rule for finding dimension e, whether the plates and rivets are either of steel or iron, is as follows:
“Multiply the diameter of the rivet by 3 and divide by 2, the formula being as follows:
| 3 × d | = e. |
| 2 |
“To find the distance v between the rows of rivets in chain riveted joints. This distance must not be less than twice the rivet diameter, and a more desirable rule is four times the rivet diameter plus 1 divided by 2, thus:
| 4d + 1 | = v. |
| 2 |
“To find the distance between the rows of zigzag riveted joints:
| √ (11p + 4d) × (p + 4d) | = v, |
| 10 |
that is, multiply 11 times the pitch plus 4 times the rivet diameter, by the pitch plus 4 times the rivet diameter, then extract the square root and divide by 10.
“To find diagonal pitch pd, multiply the pitch p by 6, then add 4 and divide by 10, thus: