The name of the right bamboo for sail boat building...

[raf242]

Hi, I'm looking for the name of this very regular shaped bamboo as I'm interested in building sail boats with it:
http://www.bamboocraft.net/gallery/data/3043/thumbs/Bamboo_Boats_-_Building_a_New_One.jpg (http://www.bamboocraft.net/gallery/showphoto.php?photo=1184)
Can anyone help me ?
Thank you