FIELD: construction.
SUBSTANCE: composite girder contains first layer of reinforcement fibres, with fibres orientation at angle +α degrees relatively longitudinal axis of the girder, and second layer of reinforcement fibres, with fibres orientation at angle -α degrees relatively to said longitudinal axis, where α is from 9 to 12 degrees.
EFFECT: higher physical and mechanical properties of articles.
15 cl, 14 dwg
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