In an extension to our house built in 1967, there is a basement and an entry level. It is equipped with a gable roof with trusses according to the drawings below.
We intend to take down the wall marked in yellow on the floor plan, which is on the entry level. Directly above the entry level is the attic with the trusses.
Is the wall load-bearing and thus needs to be offset, or does the construction of the trusses allow us to take down parts of the yellow-marked wall without offsetting?
Thank you in advance!
Floor plan at entry level (i.e., directly below the trusses)
Construction of the trusses
Location/position of the trusses in the attic, the horizontal lines refer to the placement of the trusses.
Hard to say. Normally, such saddle trusses should rest on the outer walls. But it's 8 meters in span and they appear to be nailed in the middle, so maybe they're relying on a central wall to support them in the middle? But it might be considered as strong as a pure beam there (I don't know nail plates and what they do for strength, etc.). Probably means that there isn't any significant load on top like an attic/storage or similar, though.
If the upper beam is 2 x 6 inches (about 50 x 150mm) and the lower beam is 2 x 5 inches (about 50mm x 125mm), it sounds reasonable in lower snow zones on an 8m span without support.
To add, the house is located in Stockholm. Snow zone 2?
Then maybe you can fit it in (the guide states 7 m span, you are slightly over. On the other hand, you have older timber that is a bit thicker than a standard 145mm...
If you want to be on the safe side, you should consult a structural engineer.
