ᐅ Roof design / Mandatory use of the second floor in buildings with two full stories
Created on: 8 Mar 2017 16:29
M
mertmk3
Hello,
Our development plan allows for 2 full stories with a pitched roof at an angle greater than 30°. We are currently considering the best way to utilize this space. We are certain that we want at least a knee wall height of 1.8m (6 feet) on the upper floor, but we are also open to building without a knee wall and having 2.5m (8 feet) ceiling heights instead. Since we are planning a basement, we don’t need to use the entire attic space for storage, which raises the question: What roof pitch and upper floor height make the most sense? Building unnecessarily high doesn’t make sense, nor does having a large unused attic area. Are there examples of how the roof could be designed architecturally to enhance the sense of space? Essentially, an open roof design to create a generous, spacious feeling?
How would you design the roof given the above conditions?
We would appreciate suggestions, preferably with pictures.
Next week we will visit the architect and will of course ask these questions, but having ideas beforehand would be even better.
Best regards
Our development plan allows for 2 full stories with a pitched roof at an angle greater than 30°. We are currently considering the best way to utilize this space. We are certain that we want at least a knee wall height of 1.8m (6 feet) on the upper floor, but we are also open to building without a knee wall and having 2.5m (8 feet) ceiling heights instead. Since we are planning a basement, we don’t need to use the entire attic space for storage, which raises the question: What roof pitch and upper floor height make the most sense? Building unnecessarily high doesn’t make sense, nor does having a large unused attic area. Are there examples of how the roof could be designed architecturally to enhance the sense of space? Essentially, an open roof design to create a generous, spacious feeling?
How would you design the roof given the above conditions?
We would appreciate suggestions, preferably with pictures.
Next week we will visit the architect and will of course ask these questions, but having ideas beforehand would be even better.
Best regards
11ant schrieb:
I see it differently: You are entitled to your opinion ... the regulations regarding when a floor counts as a full story (there are only minor differences between federal states) do not matter in this case. When the Roman numeral II is enclosed in a circle, it requires the construction of a full, not a _calculated_, two-story structure. And that is the only issue concerning the original poster’s specifications ... so far.Strange, until now I was always told that working with a knee wall is still possible. I'll take that as a point to clarify with the architect. If full stories are really mandatory, it’s probably best to keep the roof pitch at 30° so the roof does not become unnecessarily high. Still, I don’t see any problem with partially opening the roof.
Regarding the total height, the following table is in the zoning plan, measured from the ground floor finished floor level to the intersection of the exterior wall and roof:
Number of full stories Building height [m]
I 3.5m (11.5 ft)
II 6.2m (20.3 ft)
Regarding the total height, the following table is in the zoning plan, measured from the ground floor finished floor level to the intersection of the exterior wall and roof:
Number of full stories Building height [m]
I 3.5m (11.5 ft)
II 6.2m (20.3 ft)
mertmk3 schrieb:
The following table is listed in the development plan regarding the overall height, measured from the ground floor level to the intersection of the exterior wall and the roof:
Number of full floors Building height [m]
I 3.5m (11.5 ft)
II 6.2m (20.3 ft)I hardly believe that a state building code would apply two different definitions for a full floor at the same time: what is considered a full floor according to the building code should also be regarded as such in the development plan. There is no indication that only floors without roof slopes should be counted. The encirclement of the number of floors simply means that it is mandatory here rather than optional. The encirclement does not prescribe a specific method to achieve the number of full floors.
However, where the number of floors is specified as "II," there is usually no option to choose between one or two floors—does the development plan also include plots with an encircled "I"? Otherwise, this table wouldn’t make much sense.
The referenced height basically corresponds to a type of eaves height, but it is not measured at the gutter, rather at the exterior wall. A height of 6.2 m (20.3 ft) is definitely sufficient here for a knee wall or even a full floor as per Iktinos standards.
For my example, I calculated a knee wall height of 180 cm (70.9 inches) and a 30° roof pitch (gable roof). With a hip roof, the calculation would be slightly more complex. At 45°, even a building depth of 2 m (6.6 ft) would be enough to create such a full floor.
In my opinion, it is conceivable to have an exposed underside of the roof at a (not permitted here) 20° roof pitch throughout all rooms without making small rooms appear "pointed." At 30°, I would exclude some rooms from this, and at 45°, it almost suggests including loft beds in the children’s rooms.
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mertmk3 schrieb:
Yes, there are also land parcels marked with an I, but not circled.This makes sense because with only one full storey, the "maximum number" of storeys is automatically reached as soon as you build anything at all. In theory, you could construct a single storey with a knee wall there, but since a basement does not count, there would be no additional full storey below to base height proportions on – so it would never be considered a full storey. It would be possible to recess a storey so that a basement with a knee wall and ceiling top edge is no more than 1.4 m (4.6 ft) above the ground level. But no one wants to build such nonsense just because it might theoretically comply with the zoning plan. Therefore, you can safely omit the circle around the "I" here.
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