\documentclass[varwidth]{standalone}
\usepackage{tikz}
\usetikzlibrary{positioning}
\usetikzlibrary{chains}
\usetikzlibrary{shapes.multipart}


\begin{document}

\newlength\nodewidth
\setlength\nodewidth{120mm}

\begin{tikzpicture}
  \tikzset{every node/.style={rectangle split, draw, rotate=90}, rectangle split parts=10}
  \node[rectangle split, minimum width= 1.2cm,
                        minimum height = 1cm]  {};
\end{tikzpicture}

\end{document}