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Design Zp=M×8mofy=3.34×106×1.10250=14696mm3
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Zp=M×8mofy=3.34×106×1.10250=14696mm3

From shear table select ISLC 100 mm having h=100mm, bp=50mm , tf=6.4mm

tw=4mm γ=6mm, Ixx=164.7×104mm Iyy=24.8×104mm4, Zxx=32.9×103mm3 Zyy=7.3×103mm3

Zpz, prov=38.09×103mm3

Zpy=Zy× s

=7.3×103×1.1576=8.45×103mm3

h1=74.3mm

sectional classification:

btf=506.4=7.8<9.4ϵ

dtw=74.34=18.58<42ϵ

section is plastic

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