Structural analysis devolves upon two essential operations - the assessment of the external forces to which a structure may be subjected, and the determination of the internal stresses induced by these forces in the various portions of the structure. In specifying the external forces, recourse is usually had to accepted codes of practice which recommend the loading to be taken into account for a variety of conditions. It is not sufficiently realised, however, that these load classifications are of necessity imperfect representations of actual conditions. This arbitrariness is particularly evident in the case of the design wind loads laid down in building codes. The purpose of this paper is to bring the problems associated with the assessment of wind loads in the design of exposed engineering structures within the purview of that part of dynamical meteorology which deals with atmospheric motion near the ground.
The paper descriptionbed urban transportation problems facing American cities, and discussed the methods applied by engineers and planners in the team approach to gathering data about metropolitan areas and preparing urban transportation plans.