Hi, I hope there's someone who can help me with this I'm exploring the possibility of building an intermediate floor to create two levels. The gypsum construction with the black doors on the left will be demolished. The area in the hall is about 200 m2. I assume the horizontal steel rods in the ceiling are for horizontal tensile load? They should be able to be removed if the intermediate floor is built? Does anyone have an idea of what it might roughly cost?
The steel rods function as collar beams that, among other things, prevent the rafters from pushing out the outer walls. They also allow the rafters' upper legs to be given smaller dimensions. Normally, you cannot remove them, but possibly move them vertically. It is certainly possible to build an intermediate floor.
It would probably help the knowledgeable builders here (which I am not) if you mention how wide and long the building is.
So that they can calculate each floor joist's dimension and how many joists might be needed.
What kind of flooring are you planning to have up there?
And what kind of load on the new floor, new living space or what?
I'm unsure about the dimensions, 20x10 meters? The idea is two floors, both intended for residential purposes. The floor needs to meet EI60 and 56 dB sound class. It would also be good if VA lines and electrical wires could run through the floor. Does anyone have an idea about the cost, per square meter?
Anyone involved in cost calculations in a serious way, which I do not, has a concrete proposal to start from. Otherwise, it would just be guesses. I would personally guess between 10,000 SEK and 20,000 SEK per sqm, depending on location and execution. An intermediate floor can be made very simply, but your fire and sound requirements will drive up the cost. With the current dimensions, a frame construction in steel or laminated timber is required. The big question is how best to accommodate the column forces that arise.
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I'm exploring the possibility of building an intermediate floor to create two levels. The gypsum construction with the black doors on the left will be demolished. The area in the hall is about 200 m2. I assume the horizontal steel rods in the ceiling are for horizontal tensile load? They should be able to be removed if the intermediate floor is built? Does anyone have an idea of what it might roughly cost? 
