FIELD: machine building.
SUBSTANCE: structure of vehicle frame element has a structure of a closed cross-section, having a pair of first and second pair of wall sections. First bosses are protruding bosses and are located on a pair of first wall sections. Second boss is a recessed ridge and is located at any of second pair of wall sections on line extending from first boss. First boss has first flat surface parallel to surface of first wall section. Second boss has second flat surface parallel to surface of second wall section. Recessed raised section is located at connection section of first flat surface of first boss and second flat surface of second boss in one of angular sections. Sheet thickness of raised section is greater than sheet thickness of one of wall section.
EFFECT: higher impact resistance.
3 cl, 26 dwg, 2 tbl
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