Suitably qualified bod to help with an RSJ calc - willing to pay for work.

[Polar Bear]

mllePB needs numbers for an rsj for a 9 inch solid brick wall where the joist will need to span a 1.8m opening.   The wall is an end wall and is part of a terrace with a neighbouring property, full two storey height and with a tiled roof.  This is an opening at ground floor level.

She also needs to know how much rsj she needs to allow for each side of the 1.8m so total length as well as tech spec for the necessary loadbearing. 

She needs this for the building regs application.

[Canardly]

Mike,

Once upon a time RSJ or other deemed to comply tables would have been enough for a simply loaded supporting beam in a two storey dwelling, however things have changed. Get a local structural engineer on the job, he/she will probably cost less than a plumber. If you have accurate drawings these will probably suffice. You may need pad stones, engineering bricks, or attached piers/wall thickening for the RSJ Lintel bearings, the SE will check this out and allow for lateral and torsional loadings. Failing this, Catnic or other lintel manufacturers may be able to help if you are using one of their products and have a simply/uniformly loaded situation.

What do you mean by end wall?

[Polar Bear]

...

What do you mean by end wall?

Although the house is a terraced house, the typical style of these 1870's buildings is to have the kitchen and a room above extending from the rear of the main structure out into the garden.   These are usually paired back-to-back with one of the neighbouring properties, the other side being open 'yards'.

The wall at the end of the kitchen is a 9 inch, twin leaf solid brick construction is the 'back' of the house, end of the kitchen and bathroom which is in the room above the kitchen.

Example image

The wall that would be at the top of the diagram at the end of bedroom 3 and the bathroom in this case.   The layout varies slightly from this property but you get the idea, I hope. 
 

[LittleWheelsandBig]

End wall has wind loading.

[Canardly]

So basically you are talking about the gable wall of the 'back addition'. Should be straight forward enough, however, floor and roofing member layouts will all play a part. This below gives an idea.

http://iglintels.com/lintels/selecting-the-correct-lintel/

[Polar Bear]

Excellent.   Thanks for the link.

I'll keep that to hand just in case somebody suitably qualified doesn't rock up...

Interestingly, that link gives a great example of an 1800mm gap and shows 150mm overhang at each end.   Just the sort of info that we need.   

[Blodwyn Pig]

could suggest catnic CN71A, with a 150mm end bearing. The loading is not that great, the floor/ceiling joists usually run side ways, from the central wall, and the load above the opening is not a great deal. Although it looks a lot, if you were to draw a line 1800 long where the opening would be, then from each end draw a line up at 45 degrees, the enclosed triangle is the loaded area, as load paths typically travel at this 45 degree angle. catnic would normally provide you with the info, if you supply a drawing of some sort. Problem with an RSJ is that you are supporting the wall from underneath, and end up trying to hide the steel from the outside, If you want to go down the steel route, might suggest an RSC inserted facing backwards, with an angle welded on to the back, to mimic the Catnic CN71A

[Blodwyn Pig]

you may also need a party wall agreement, as although its not a party wall, it sounds like it is within the area that is adjacent to, and should there be any disruption or  movement, then

[Aunt Maud]

http://catnic.com/assets/downloads/Catnic_HowToSelectALintel_StaticInfographic_April2014_CCP0247.1.pdf

You can even ring them up and ask. Number's on the pdf

[canny colin]

If you get stuck  give Birtly lintels a phone . Its generally accepted in the trade that birtly lintels are  more robust being a thicker gauge steel  & hot dip galvanised .

[Blodwyn Pig]

Oh, and you'll probably need a min 550 mm internal return on the corner, for stability.