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Renfort par IPN desenfumage


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bonjour, j'ai un petit probleme sur le calcul d'un IPN.

je vous explique,

on a agrandit l'ouverture désenfumage de 80cm*80cm à 100cm*100cm comme la norme l'exige, on a renforcer la dalle par un IPN mais je ne sais pas comment la calculer, et est ce que il faudra vérifier la dalle aussi?


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