A program in which conventional hand layup and autoclave cure techniques are applied to the design, construction, and field evaluation of composite flooring and underfloor structure in the U.S. Army Ch-47D Chinook helicopter is discussed. The cargo floor beam design and the design criteria which include frame bending and shear design loads induced by water landing and vehicle wheel loads on the ramp treadways are presented. Fabrication techniques are examined with regard to pultruded beam tee caps and pultruded beam shear web panels. Results of a comparative cost estimate between an all aluminum beam and an all composite pultruded shear web and cap replacement beam assembly are presented. (aerospace database)
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