A vague and difficult question perhaps, especially considering the extension.
I have a house from around 1919, plank frame and 1.5 floors.
In 1959, an extension was made on one of the gables with a bedroom including a basement.
The image below does not match the current design/facade, but shows the principle.
The entire house is full of various hallways and doors. We basically have a hard time getting a good floor plan for the extension, but we might have decided to remove the area marked in orange below, which currently serves as a storage of about 1.2*1.4m. At least it will feel less like a hallway then.
However, I am a bit worried about what it's like to cut away an additional 1.4m of the old gable on the ground floor. Currently, we have poor insight into what, for example, the roof trusses look like for the extension and how they are attached.
My assessment otherwise is that the load-bearing is done in the same direction on both parts of the house. For the original part, it is done on the long side exterior wall and through the "heart wall." That is, the gables do not bear major loads.
1. Does anyone have a sense of whether the above is correctly reasoned?
2. Do we have any other suggestions for the solution of these two somewhat too small bedrooms? The middle part is assessed as load-bearing.
Plank frames function as panel constructions where all the components work together. It is true that the roof and floor loads end up on the side walls and core walls, but all the walls in a plank house are to a greater or lesser extent load-bearing. It usually works well to create openings, especially in gable walls and other transverse walls, but the openings must be supported in the plane of the plank frame. The wider the opening, the larger the dimension of the support beam. For a standard door opening, a plank as a beam is usually sufficient. For larger openings, calculations should be made. The support beam must also have proper bearings.
Spontaneously, it seems that the best solution is a new entrance so that the extension can be utilized effectively.
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