Layout type

This uses a single table to handle all 5 boxes. In addition, it uses the "table trick" to linearise with the article before the sidebars.

It is very robust. Perhaps the hybrid technique using a table just for the 3-columns, and also using the "table trick", is better. There is a lot to be said for making layout tables 1-dimensional, then nesting them to achieve structure at right angles to this.

Article

First article filler header

Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text.

Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text.

Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text.

Second article filler header

Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text.

Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text. Article filler text.

Rightbar

Rightbar filler header

Rightbar filler. Rightbar filler. Rightbar filler. Rightbar filler. Rightbar filler.

Rightbar filler. Rightbar filler. Rightbar filler. Rightbar filler. Rightbar filler.

Rightbar filler. Rightbar filler. Rightbar filler. Rightbar filler. Rightbar filler.

Leftbar

First leftbar filler header

Leftbar filler. Leftbar filler. Leftbar filler. Leftbar filler. Leftbar filler.

Leftbar filler. Leftbar filler. Leftbar filler. Leftbar filler. Leftbar filler.

Second leftbar filler header

Leftbar filler. Leftbar filler. Leftbar filler. Leftbar filler. Leftbar filler.

Leftbar filler. Leftbar filler. Leftbar filler. Leftbar filler. Leftbar filler.

Leftbar filler. Leftbar filler. Leftbar filler. Leftbar filler. Leftbar filler.