ABSTRACT
The structural design of a large trimaran is presented for a vessel of both high strength steel and titanium. The structural design procedure consists of prescriptive classification society rules as well as verification through a grillage analysis for ultimate strength. The results for both material designs are presented and compared, including midship section scantlings, hull structural weight, material properties and performance in a marine environment. The vessel considered is significantly larger than any which have been built to date and is intended for fast cargo transportation. The structural design procedure has been adopted following comparison to other approaches.
