That's actually not a bad idea. If I was to go down that route I'd potentially add a third screw in the middle (Not for fixing the beam) to make it more secure. And that would just be a standard bit of timber like what I'd use for a stud wall right?
Regarding the weight we're not planning to put anything on top, purely decorative and it weighs just over 6kg
Yeah, I would just use a 2x4, or whatever I could fit (I am not a builder or structural engineer). My main worry would be about pulling those bricks down, but if that's a bit of steel running under them as a sort of lintel (would be mad if there wasn't something) then I would be less concerned.
Yeah it is, doesn't seem to be the strongest of things but it does across the whole width of the chimney breast taking support from the vertical bits at the side.
That's actually not a bad idea. If I was to go down that route I'd potentially add a third screw in the middle (Not for fixing the beam) to make it more secure. And that would just be a standard bit of timber like what I'd use for a stud wall right?
Regarding the weight we're not planning to put anything on top, purely decorative and it weighs just over 6kg