FIELD: metal structural members for skin.
SUBSTANCE: proposed structural member has built-in profiled rigidity members. Profiled rigidity members (2) have bulge (4) of definite thickness (f) which reduces towards joint area (3) or connection to definite thickness (a) at this joint area or connection; ratio of thickness (f) of base of profiled rigidity member (2) to thickness (a) at joint area or connection is more than or is equal to 2.
EFFECT: enhanced efficiency; high resistance to spread of cracks; increased residual strength.
10 cl, 4 dwg
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