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Homework Statement
A symmetric I section beam is 60 mm deep with a second moment of area of 663x10-9 m^4 and a cross sectional area of 1600 mm^2. It is subject to a bending moment of 1.2 kN.m and an axial force of 25 kN (tension). Find the maximum tensile and compressive stresses.
Homework Equations
σ=My/I
The Attempt at a Solution
So everything is given except the 'y'. I am unsure how to work this out as I am only given the depth.
Also could someone explain the relevance of the given axial force?