\hrule width\hsize \vskip10pt

\begin{calstable}
\colwidths{{60pt}{120pt}}
\brow \cell{aaa} \cell{bbb} \erow
\brow \cell{ccc} \cell{ddd} \erow
\tbreak{(break)\par}
\brow \cell{eee} \cell{fff} \erow
\brow \cell{ggg} \cell{hhh} \erow
\end{calstable}

\bigskip
\hrule height5pt depth5pt width180pt
\bigskip

\def\cbll#1{\cell{\textbf{#1}}}
\begin{calstable}
\colwidths{{60pt}{120pt}}
\thead{\brow\cbll{iii}\cbll{jjj}\erow}
\tfoot{\brow\cbll{kkk}\cbll{lll}\erow}
\brow \cell{aaa} \cell{bbb} \erow
\brow \cell{ccc} \cell{ddd} \erow
\tbreak{(break)\par}
\brow \cell{eee} \cell{fff} \erow
\brow \cell{ggg} \cell{hhh} \erow
\end{calstable}