\documentclass{standalone}

\usepackage{tikz}
\usetikzlibrary{decorations.pathmorphing,decorations.markings}

\begin{document}
\begin{tikzpicture}


\foreach \i in {1,...,7}{
  \draw[postaction=decorate, decoration={markings, mark=at position .5 with {\arrow{>}}}](2*\i-2,0)--(2*\i,0);
  \draw[decorate, decoration={snake}](2*\i,2)--++(0,-2);
  \fill(2*\i,0)circle(0.1);
}
\draw[postaction=decorate, decoration={markings, mark=at position .5 with {\arrow{>}}}](14,0)--(16,0);

\draw(1,0.25)node{$h$};
\draw(3,0.25)node{$h_1$};
\draw(5,0.25)node{$h_2$};
\draw(7,0.25)node{$h_3$};
\draw(9,0.25)node{$h_2$};
\draw(11,0.25)node{$h_1$};
\draw(13,0.25)node{$h_1$};
\draw(15,0.25)node{$h$};

\draw[line width=0.25em](1.75,-1)--++(0,4)--++(12.5,0)--++(0,-4)--++(-12.5,0);
\draw[line width=0.25em](3.75,-0.75)--++(0,3.5)--++(6.5,0)--++(0,-3.5)--++(-6.5,0);
\draw[line width=0.25em](5.75,-0.5)--++(0,3)--++(2.5,0)--++(0,-3)--++(-2.5,0);
\draw[line width=0.25em](11.75,-0.5)--++(0,3)--++(0.5,0)--++(0,-3)--++(-0.5,0);


\end{tikzpicture}
\end{document}
