FIELD: transportation.
SUBSTANCE: product formed by pressing extends in a given direction and comprises a top plate, a ridge, a vertical wall, and has a groove-shaped section. The structural element additionally comprises a groove formed in the upper plate and an outer flange formed in the ridge area. The groove has a depth set according to the groove width and the steel sheet thickness.
EFFECT: effective absorption of impact energy and increased rigidity.
24 cl, 47 dwg
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