steel drawing detail for wall plate

[rob1234]

Hi Im removing the 225mm solid wall up to the wall plate and need steel calculation for the steel size the opening its 2300mm wide and Im thinking of doing a loft conversion after and its on the corner of the bungalow so ive been told i have to come in 600mm from internal wall does anyone have any drawings detailing how far in from the corners and wall plate detail that i can use as an example.

Kind regards, Rob 

[Mr Punter]

Can you post a drawing?  What is the steel supporting?  Part A of the Building Regs approved docs may be worth a browse.

[rob1234]

11 Whitby Avenue drawings.pdf

[Dave Jones]

150 high 100 wide with 285ish bottom plate welded on.

[rob1234]

thank you for your replies, Ive already built the extension and the new joists are sitting on the original wall plate with the existing bungalow joists do i still need the flat plate  to be 285mm plate on the steel or can it be 2 steels bolted together 

[TonyT]

You will need a structural engineer’s input to get sign off for building control purposes