\documentclass[fanfold]{pagelayout}

\gutter=5mm
\bleed=3mm

\placeholders\safezone

\newtemplate[double]{test}{
  \setgrid[width=(\width-2\gutter)/3,x=\margin]{
    {{}}
    {{}}
  }
  \placeholder{}
  \placeholder{}

  \setgrid[width=(\width-2\gutter)/3,height=\pageheight]{
    {{}}
  }
  \placeholder{}

  \setgrid[width=(\width-2\gutter)/3,x=(\width-2\gutter)/3*2+2\gutter+\margin]{
    {{}}
    {{}}
  }
  \placeholder{}
  \placeholder{}
}

\begin{document}

  \template{test}{}

\end{document}
