| 摘要 |
A shelf board (3) formed of a plate-like material, particularly sheet metal, exhibits by way of a stiffening profile (6) a tubular cross-section at least along one of the longitudinal edges. To improve the torsional or twisting deformation resistance and thus achieve a higher load carrying capacity, the tubular cross-section of the stiffening profile (6) is equipped at least at its inside bottom surface with a stepped recess profile section (15) formed by a step-shaped bend (11, 12).
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