You can basically build any desired room layout. Structural feats like long-span sections or staggered load-bearing walls cost material and money. Staggered load-bearing walls do not fit with budget-conscious construction.
Load-bearing walls are actually highly recommended to be aligned vertically — or rather stacked one on top of the other. For this, read (externally, including the quotation marks for searching) "The upper floor takes priority," "Plan change: from concrete to a wooden ceiling," and "Lightweight walls in solid houses?"
Sort of, not all load transfer needs to be strictly aligned under the ridge beam. In the presented layout, even if the upper floor were an attic floor, I see no difficulties.
Thank you all, that already helps us considerably with the question.
No, when used as a storage room, the dry attic truss is rather the cheapest option — somewhat freely spanning and also immediately forming the topmost floor ceiling; this also frees up the layout of the upper floor.
The initial idea was/is to not expand the attic further at first and to use it as a cellar replacement. If expansion is desired prospectively, a dry attic truss roof would be a rather unfavorable solution — in that case, we would prefer a purlin or rafter roof due to the freedom in room usage. What do you think?
What do the plot and the development plan say? — Has the 11ant cellar rule ("With or without cellar: a rule as a decision-making tool") been considered?
The plot has 526 sqm; the development plan indicates a building level II/2 — two full stories plus an attic as a non-full story. The site coverage ratio is 0.2 and the floor area ratio is 0.4. The city planning office suggests a deviation in terms of exceeding the floor area ratio for the attic expansion (including comparison with neighboring plots) and consequently recommends planning the rooms as living spaces. We have read the 11ant cellar rule — the plot is almost level. The existing building, which has no cellar, will be demolished.
Not to me. It won’t be your plan going to the structural engineer, but that of the planner or architect, i.e., the specialist.
Sure, that was meant — we just like to call it “our” project ;-)
Aside from that, your first draft raises quite different questions:
1. What modern technology is supposed to fit into a HAR of this size?
2. Why does the staircase have a different format upstairs than downstairs?
3. How is the large living room supposed to be furnished without creating a large traffic area within the room? (Or do you always want to have space to dance without moving furniture?)
4. How can such a narrow storage room be used effectively?
5. What limitations on furniture size result from the narrow staircase / narrow hallway for the first upper floor?
6. Where are doors? Where does the daylight come from?
Thanks for the questions — they help challenge our own thoughts! Actually, I planned to start the floor plan discussion in the appropriate subforum and feed it with the necessary additional inputs, but I’m happy to address these topics here already:
[*]The idea in the shown floor plan is to split the contents of the “classic” technical room on the ground floor into a HAR (house technology room) + storage on the ground floor and a utility room + storage upstairs. Based on the “usual” technical room sizes of about 10 - 12 sqm, the first thought was to split this size. But please feel free to give us feedback if this “definitely won’t work” :). The current goal is to have at least 8 sqm on the ground floor. Building technology is as usual in a new build — we will install a brine-water or air-water heat pump, probably without storage tank. We want to place the photovoltaic technology in the attic.
[*]We aligned the shape of the staircase to the walking paths — on the ground floor split between entrance and living room towards the upper floor — and tried upstairs to be even more space-saving (therefore two quarter turns there). Does that lead to relevant additional costs?
[*]What do you mean by “large traffic area”? The idea so far is to place the kitchen on the right side, the dining area in the middle, and the living area on the left side. The room orientation is then almost exactly southeast. Possibly the room is currently planned too large?
[*]We want to equip the storage room upstairs with wall shelves/cabinets and a washing machine + dryer. But the narrow width has already caught our negative attention — we want to address that.
[*]The hallway is planned to be 1.25 m wide; the staircase has 1.0 m stair width. We thought these are usual widths?
[*]Not yet drawn in — as said, we did not want to start the floor plan discussion yet.
Thanks so far — I’m looking forward to further exchange.