Hello.
I have a 1½-story 70s house with concrete tiles and plank roofing with a 45-degree pitch. The trusses are spaced at 1200 mm center-to-center and the floor joists at 600 mm center-to-center. The joists are 210 mm high.
In the room, there is a window frame with 3 windows, but previously there were 2 windows and 1 door. This means the upright stud between the window and the door was removed, causing the roof to sag, and it is now supported by the window frame itself. I briefly talked to the inspector when we bought the house, and he said/thought it would suffice to insert a 45x220 mm stud resting on 2 45x120 mm studs on each side of the window. The distance between the two upright studs is 2800 mm.
I think a regular 45x220 seems insufficient for that distance and wonder if anyone can calculate what is needed, either regular or glued laminated timber, whichever works up to a height of 300 mm (that's the distance between the window frame and the joists).
Edited:
I found the following PDF online:
http://www.byggbeskrivningar.se/byggbesk.aspx?Cid=462&Id=44 and it clearly shows that a 45x220 isn't even close to handling it. The width of our house is 8m and the opening is almost 3 meters, and for snow load zone 2 (I live in zone 1), you should have a 115x315 glued laminated beam to handle the load, and that's a bit wider than I can have, so it will have to be a 90x315 beam or a steel beam equivalent to 115x315 to be sure it holds.
