Support required for removing load bearing wall

FK1

Widening doorway in structural load bearing wall of 2 storey house with 6 inch pumped cavity and concrete precast floor for the upstairs. 

Current opening is 1.6m with 2 rsjs in situ, going from kitchen out to full height sunroom, looking to increase the opening to 3.6m ( see pic below from sunroom)

Can anyone advise me, to support the first floor is it enough to acro prop the concrete floor slabs or would it be necessary to needle prop into the rooms upstairs ( given one is a bathroom, I would be looking to avoid).

Understand I need a structural engineer and builder but trying to figure out firstly how much of a job it will be in my own head first 

 

 

grimeire

We would of normally took out blocks above the opening and then put rsj or lamentated 9*2 through and prop them with acrows. Then we would also using scaffolding planks and prop the ceiling either side of the wall with arcows.

That way the wall and the floors above would be propped. In your case this looks like it may be more difficult ordeal as you have a vaulted ceiling on one side and it's a pretty large opening you are making. Doesn't look like there is anything supporting that ceiling at the top as it goes to a point and I don't see any purlions.

Beaware here that if you have a bathroom above you will most certainly get some movement as if someone doesn't prop the rsj or scaffolding planks enough or too much there may be cracks in grouts or plaster.