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2008 - 20th HISWA Symposium
Longitudinal Vs Transversely Framed Structures For Large Displacement Motor Yachts
The selection of a structural framing system in any vessel must be made from a consideration of weight, production matters, suitability to resist global loads and vibration. Vessels can principally be either transversely or longitudinally framed although hybrid systems are also in use. However the choice of which framing system is best can be the cause of considerable debate between designers and builders with the advantages and disadvantages of each system often being debated but rarely quantified.
This paper explores the structural design of an 80m displacement motor yacht utilising both transversely and longitudinally framed systems, with the aim of quantifying the weight, structural benefits, and production differences between the two.
In the development of the basic structural design, rule minimum local scantlings are considered and then suitably increased to account for practical constraints, production aspects and global loads. Following analysis of the results the Authors have assessed a hybrid framing system which is considered to combine most of the advantages of other systems.
