\documentclass[margin=2mm]{standalone}
\usepackage{tikz-sections}

\begin{document}
\begin{tikzpicture}
\TikZRCRectangular[width=300, depth=500, cover=40, bar diameter=18, top bars=2, bottom bars=3, scale=0.02]
\TikZRCRectangular[width=400, depth=400, cover=45, bar diameter=20, top bars=3, bottom bars=3, left bars=2, right bars=2, x=9, scale=0.02]
\TikZRCRectangular[width=300, depth=550, cover=40, bar diameter=18, top bars=2, bottom bars=3, bottom layers=2, layer spacing=28, x=18, scale=0.02]
\TikZRCCircular[diameter=450, cover=45, bar diameter=20, perimeter bars=10, x=27, scale=0.02]
\end{tikzpicture}
\end{document}
