Economy in Rectangular Panels, Using Beams of Constant Cross-Section

It is claimed by the Engineer that he makes public improvements, or work, possible, by designing structures with the greatest economy consistent with safety, taking into account the first cost, maintenance, and probable life of each structure. In doing this he calls to his aid his entire store of knowledge and experience, in order that, in the general plan, the relatively useless and expensive features may be eliminated, and the truly essential and useful reasons for undertaking the work may be emphasized and kept constantly in mind. Having arrived at a fairly well-planned working model, the detailed building of the parts proceeds along the lines of the general scheme, but on a smaller scale. At this stage the engineer must rely on his skill in grouping the parts, so as to give the best results for the money to be expended.