FIELD: transportation.
SUBSTANCE: beam is formed from a continuous material sheet in the form of a closed tubular body. The body has an upper wall and a lower wall, connected by an inner wall and an outer wall. The support passes between the inner wall and the outer wall, and a reinforcing element overlaps at least part of the outer wall between the support and the lower wall to obtain a two-wall structure.
EFFECT: simplification of manufacturing and cost reduction.
14 cl, 11 dwg
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