I have a 65" TV (23kg) and wall bracket rated up to 50kg. I'd like it mounted on a plasterboard wall. I don't want it to fall so will need it mounted through the wall to the metal uprights behind the plaster. This may require a wood board installed on top of the plasterboard so it can be secured to the uprights, since there is a limited area where the TV will go which may not align with the uprights