A square box girder, with side dimensions of L, is subjected to the loading shown.Each comer of the box girder is fabricated to resist bending moments and will retain a

90° comer underload. (2+2+2+2) Draw the axial, shear and bending moment diagrams for the box girder. Show the distances to all points of relative maximum and minimum values. Sketch the deflected shane dimensioning the distance to all points of inflection. Because the structure and loading are symmetrical, you may declare a plane of symmetrical Tor your diagrams and state the other side is a “mirror image." (2) Determine the rotation, in degrees, of each corner.