Tournament Enclosures & List-Fences
Jousts and Tournaments: Charny and Chivalric Sport in 14th Century France

The Book of the Tournament

Tournaments: Jousts, Chivalry and Pageants in the Middle Ages

http://www.amazon.com/gp/product/0850458366

Tournament

The Medieval Tournament

The Tournament in England, 1100-1400

These links provide some ideas for fences for tournaments. For one method of construction, see A Proper Tourney Fence.