I found a nomograph for sizing flashboard pins
in an older version of Creager and Justin. I wanted to confirm the nomograph and
understand its limitations. I made the following analysis of the failure of
flashboard pins. It confirmed the C&J nomograph. The analysis allows for the
computation of pin failure for materials and pin sizes not included in the
construction of C&J's nomograph.
I recently created an Excel
spreadsheet for solving the flashboard equations. It is self explanatory and is
presented herewith viz:
(Dear reader. I am not able to install this
spreadsheet with its embedded pictures. They disappear! Please refer to the
relavent sections of the original 1986 analysis presented below the calculator.
The missing pictures include the freebody diagram, the C&J nomograph and the
standard pipe properties tables. Once again, they are on this web page located
below the Excel calculator for you to refer to.)
