Suppose we give you a little touch of rules, and formula in boiler
making.
For instance you want to know the percent of strength of single riveted
and double riveted as compared to solid iron. Some very simple rules,
or formula, are applicable.
Find the percent of strength to the solid iron in a single-riveted seam,
1/4 inch plate, 5/8 inch rivet, pitched or spaced 2 inch centers. First
reduce all to decimal form, as it simplifies the calculation; 1/4=.25
and 5/8 inch rivets will require 11/16 inch hole, this hole is supposed
to be filled by the rivet, after driving, consequently this diameter is
used in the calculation, 11/16 inches=.6875.
First find the percent of strength of the sheet.
P-D
-----
The formula is P = percent.
P = the pitch, D = the diameter of the rivet hole, percent =
percent of strength of the solid iron.
2 -.6875
--------
Substituting values, 2 = .66.
Now of course you understand all about that, but it is Greek to some
people.
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