Install a door in an existing opening

[mattemaz]

Hi,

I need to install a door in one of the basement rooms and need to open up approximately 5-6cm at the top.
It's a 22cm thick concrete wall and I'm trying to figure out the easiest way to do this.
Is it safe to chisel carefully or should I try a concrete blade for a jigsaw perhaps?
It's up to the bottom edge of the board you see according to the picture😀

 

[Centano]

Spontaneously, it feels like that part is crucial.

 

[mattemaz]

Spontaneously it feels like that part is

Spontaneously it feels like that part is load-bearing.

Yeah, I suspect as much.
Then I'll make it easy for myself and cut the frame and door instead 😁

 

[Dublin]

Doesn't the frame fit on this side of the concrete beam then? If the question was the easiest solution?