Houghton, D.S.Chan, A. S. L.2017-03-012017-03-011957-11http://dspace.lib.cranfield.ac.uk/handle/1826/11526The optimum skin thickness, web thickness and web pitch to be used for a multi-cell box of given depth under a given bending load are obtained by two different methods, resulting in a graph where the optimum geometry is plotted against the structural index for a given materialenReport