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Since the last symposium sponsored by ASTM Committee C-19 on Structural Sandwich Constructions held in June, 1951, there have been great advances in the uses and applications of sandwich construction in the commercial as well as the military fields of industry. This increase in popularity of structural sandwich construction is largely due to the recognized advantages of sandwich such as high strength to weight ratio and good stiffness factor as well as growing confidence in the integrity of sandwich structures by industry. The different segments of industry interested in structural sandwich constructions have expended considerable energy and resources in research and development so as to improve the performance of sandwich components and to expand the field of applications. The aircraft industry has concentrated on problems associated with supersonic flight conditions such as thermal resistance and stability and the new problem of sonic fatigue. The building industry's efforts have been mainly in the interpretation of the codes as they affect the introduction of new types of materials. This problem is complicated by the multitude of Federal, state and municipal regulations in existence. So as to introduce sandwich structures in the building industry, it has been necessary to conduct research and development programs in such phases as weathering, durability, stability and fire-resistance as well as keeping in mind the economical aspects. Since there are many agencies and segments of the industry involved in the fabrication and utilization of sandwich structures, ASTM realizes the continuing need for standardization of test methods and procedures. As a result of this demand, Committee C-19 on Structural Sandwich Constructions was established to standardize existing test methods as well as to introduce new test methods that will be of value to industry. Committee C-19 sponsored this symposium with the expectation that it will better acquaint the industry of what is being accomplished in the way of standardization of test methods and also to inform all those interested of the progress that has been made and to act as a “sounding-board” as to what lines of endeavor need further emphasis.
Pajak, Theodore P.
Symposium Chairman Eastern Regional Manager, Hexcel Products Inc., Havre de Grace, Md.