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Un Tres Grand Deplacement


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j'ai 3 charpente de meme dimension et meme charge 

mais une est en portique a ame pleine

la deuxieme en traverse en treillis

la troisieme un portique en prs

dans les deux premier le deplacement en tete de poteaux est admissible lorsque la section du poteau est IPE600

mais dans le cas de PRS je suis entrain de faire augmente la section jusqua HEA1110 image.thumb.png.b0f373088f8d4aba4885f4bd789ee08f.png

pourquoiiiiiiiiiiiiiiiiiiiiii quand j'ai passer au traverse en PRS le deplacement a beacoups augmenteerrr

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