backing in drive axles bend

How are trailer suspensions designed to work? My 5th wheel doesn't appear to skid tires but it sure bends the axles/frame/spring hangers during a reasonably tight turn. In fact it appears that the bottom of the frame I-beam has twisted slightly causing the equalizer and spring hangers on both sides to bend toward the drivers side. Is this a sign of inadequate support of the frame and hangers that should be corrected? Should the tires drag and not distort the alignment so severely when a turn is made?
Trying to understand if I need to strengthen these components before things become worse. Thanks for any feedback.