Moments at Wall due to
Distributed Loads 

To determine the bending stresses, the maximum moment needs to known. Since this is a cantilevered beam, the maximum bending moment will occur at the fixed end, or the wall.
M_{z} = F_{y} d = [(1.5)(0.5)] (1.5 + 0.75)
= 1.6875 kNm
M_{y} = F_{z} d = [(1.5)(0.5)] (0.75)
= 0.5625 kNm
The moment of inertia around each axis is
I_{z} = (0.1)^{3}(0.06)/12 = 5×10^{6} m^{4}
I_{y} = (0.06)^{3}(0.1)/12 = 1.8×10^{6} m^{4} 
Beam CrossSection at Wall 

The maximum moment at one of the four corners. From inspection, both the M_{y} and M_{z} moments will cause tension stress in the upper left corner, point A (don't forget that M_{z} is negative value). Similarly, both moments will cause compression stress at point D. These two points, A and D, will be the maximum tension and conpression stress, respectively. In this case, the magnitudes for both the maximum compression and maximum tension will be equal.
Maximum stress at point A, y = 0.05 m, z = 0.03 m, is
= 26.25 + 16.875 MPa
σ_{A} = 26.25 MPa
