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ferraillage de poteaux


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Bonjour,je suis actuellement entrain de dimensionner un poteaux (30x30), Nu= 0,812Mn, et après ferraillage je trouve les section suivante:
Ath= -11,78cm2, Amax= 45cm2.
Maintenant je veux déterminer Asc or je sais que Asc=max( Ath; Amin),avec Ath= -11,78cm2 et Amin= 4,8cm2.
Ma question est dans se cas , est ce que -11,78cm2=11,78cm2? Si ouii donc ma section sera Asc= 11,78cm2??? C'est exact??

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