Question: A support column is constructed from two back - to - back channel shapes as shown. The total cross - sectional area of the doublechannel

A support column is constructed from two back-to-back channel shapes as shown. The total cross-sectional area of the doublechannel shape is A=4631mm2. The moment of inertia of the double-channel shape about the z centroidal axis is 85106mm4. Assume that a=1370mm,b=730mm,c=150mm, and P=140kN. Calculate the normal stress produced in the support column at point H. Enter your answers with the appropriate sign.
Cross section
A support column is constructed from two back -

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