A C-channel section (Figure P12–4) structural steel beam of 2-in. wide flanges, 3 in. de...

A C-channel section (Figure P12–4) structural steel beam of 2-in. wide flanges, 3 in. depth and thickness of both flanges and web of 0.25 in. is loaded as shown with 100 lb acting in the y direction on the free end. Determine the free end deflection and angle of twist. Now move the load in the z direction until the rotation (angle of twist) becomes zero.

This distance is called the shear center (the location where the force can be placed so that the cross section will bend but not twist). You will need to add a beam or plate element to the center of the web extended into the negative z direction and place the load at the end of this proper length beam. (See Table 5–1 for the equation for the shear center location.)