This twisting/rotation is known as torsion. Torsion generates forces within structural elements that they are rarely efficient at resisting. It would normally result in significant increase in element size or ultimately lead to change in structural form where they are found to be acting. Torsion in structures is best avoided as far as possible.
Torsion in structures is something that is best avoided as far as possible. This is because the twisting of structural elements generates large internal forces which result in a significant increase in element sizes and possibly even change in form