1) A beam, has a uniform distributed load (DO NOT account for the self weight of the beam) a). Draw a normal stress diagram at the point of maximum positive moment, indicate the normal bending stress of greatest magnitude at that point. b). Find the shear forces at point k (at the change of section) of the cross section, at position D, 0.75 meters from support A. 

2). Column ABC has a uniform rectangular cross section with dimensions b and D (according to its code), has a embedded support both A and B. The Column is only prevented from moving in the xz plane at its midpoint C and receives a centric axial force P with a magnitude of 50kN. Determine the maximum length L1 for the column to be stable against buckling. Use  = 0.8  107(/2). 

Draw schematically the buckling curves in the planes.