[Tex/LaTex] A symbol used in civil engineering

symbols

How to make a symbol like this? Due to the reputation limit, I can't upload an image. So I decribe the symbol by word, I hope you can understand it. My symbol is:

a phi with an underscore. phi is \niphi.

Best Answer

Perhaps this does what you want. (Adapted from the Comprehensive Symbols Guide (available in your TeX Distribution.)

\documentclass{article}
\usepackage{upgreek,slashed}
\newcommand*{\ulphi}{{%
\declareslashed{}{-}{0}{-.62}{\upphi}\slashed{\upphi}}}
\begin{document}
\[
\ulphi
\]
\end{document}

enter image description here

Update

A similar question has been asked on the site with some more general solutions:

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