Are these "heart walls" load-bearing

[wipe]

Moving to my first house in six months and planning to make some changes on the upper floor. It's a 60s house, and I initially thought the walls inside weren't load-bearing since the trusses, with their design, rest on the exterior walls, and there's no wall in the living room that would support anything, etc. But now I'm getting a bit uncertain after reading about heart walls that don't need to be "whole."

I hope someone with more knowledge than me can definitely determine how it is. The walls to be removed are the ones with a red line beside them. The chimney is to remain... No planned storage in the attic, and the house is located near hallstavik.

Will it be a "simple" job, or will it require bringing in expert help to relieve and so on?

 

[Mats-S]

I hope someone with more knowledge than me can definitely determine what's going on.
The walls to be removed are the ones with a red line next to them. The chimney breast should remain.
No planned storage in the attic, and the house is located near Hallstavik.

Will it be a "simple" job, or will expert help be needed for support, etc.?

No one here on the forum can "definitely" determine the issue without an on-site visit; however, I highly believe that the walls running along the middle of the house are load-bearing, considering that the span is a whole 7.5 meters between the outer walls.
The roof slope is also 27 degrees, and you live in Hallstavik, where it tends to snow quite heavily some winters. A tile roof is also not the lightest roof.

So I absolutely wouldn't remove those walls without hiring an expert who can examine the roof on-site and perform strength calculations based on the dimensions and measurements of the roof trusses.
If you want to remove them, you will probably need to install beams to replace the walls, so there are definitely solutions to open up the floor plan. But don't take chances, whatever you do 🤔

 

[wipe]

Thanks for the response, I've browsed further on the site to understand more and stumbled upon this thread which in my uneducated eyes looks somewhat like our drawings, for knowledge can anyone explain the difference? regarding roof trusses that are free-spanning and not? Trying to learn how this works
https://www.byggahus.se/forum/threads/kan-man-riva-dessa-vaeggar.462001/

And of course, if it's not 100% sure, I will bring in experts to take a look at the house, I don't want to start tearing down without being sure
/Peter

 

[Kane]

I would classify the central walls as load-bearing based on the fact that it's checked for inner walls under "Load-bearing part" and that they are drawn differently than those perpendicular to them.

Note: I am not a structural engineer, I should add...