I have ripped the coverings of what has been done and to show a pic of bricks wall is made of and box lintel used. So are you saying with an loading point width either side of 185mm is suffice.?
I have an internal wall separating two rooms where the wall between the room supports the upstairs floor joists and a a dividing wall between two bedrooms upstairs.
My question is that i am creating a 1500mm opening between the two rooms downstairs and i am fitting a 1950mm heavy duty catnic box...