Most internal structural walls can be replaced by beams or a network of beams BUT the more steel and less structural wall, the more expensive it will be. The introduction of beams with point loading can introduce problems that did not exist with full-height structural walls.
A beam can overload the wall at the the ends of the beam where it rests on the wall; this can be resolved by introducing a padstone that will spread the additional loading to a level the wall can support. If point loading exceeds the bearing capacity, differential movement can occur, resulting in unforeseen structural problems.
For these reasons, structural engineers need to be appointed whenever a structural change is made to a building.