its built to the 8.5m rule box
on the page below you&ll see a modified crowther24 tri that also fits the class rules
http://www.multihull.org.nz/image-gallery/gallery-1005.htmhttp://www.multihull.org.nz/image-gallery-gallery/8.5m-fleet--sc1032-1005.htmthe boat pictured burying it&s bows is dirty deeds, one of the most successful of the current designs, below
http://www.multihull.org.nz/8.5m-class/8.5-rules-1008.
