FIELD: construction.
SUBSTANCE: beam comprises compressed and stretched belts and wall. Wall consists of metal sheets perpendicular to planes of belts. Metal sheets have traditional or alternate corrugation on part of length as transverse to longitudinal axis of beam. Cavities formed between metal sheets on sections of intense transverse forces are filled with concrete. Corrugations on these sections remain with section permanent along wall height.
EFFECT: reduced metal intensity and increased bearing capacity of beam.
9 cl, 13 dwg
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