ᐅ Structural Shell Contractor / Structural Shell Cost Estimation – How Do They Calculate?

alexisan schrieb:
...and everyone says something different...

That’s just the manufacturer speaking. Unfortunately, they are far away from giving you any guarantee. In other words, you would need a general contractor who is familiar with the system and can provide you with a written confirmation. Because the manufacturer also states

provided the structural engineering and thermal insulation allow it

Who is responsible for the thermal calculation and structural engineering?

alexisan schrieb:
But right now, I can’t imagine how it could work differently in the attic...
if you want to go from the attic to the bathroom below, you would have to run 2 m (6.5 feet) horizontally in the ceiling towards the south and then another 1 m (3 feet) towards the east... I don’t think that works...

Exactly: form follows function. That means if planned properly, the downpipes would be located in the internal corners. The room layout would be designed accordingly. Not everything that works in CAD actually works in reality.

alexisan schrieb:
doing the factory planning together with a local architect

alexisan schrieb:
Architect: I have someone who is familiar with SketchUp (my software). He takes my model and transfers it into CAD

alexisan schrieb:
I have done it exactly like that so far. I found a structural engineer responsible for building permit / planning permission who prepared the plans properly for little money

So, what is it now?

Hello,

- The draftsman prepared the plans for the building permit / planning permission. However, he is too far away to provide effective support going forward. I would prefer a local structural engineer / architect / specialist for the execution phase (performance phase 5+).

- I have someone for the structural calculations and also for the thermal calculations.

- The wastewater pipes will be integrated into the walls. Access points for inspection and maintenance will be provided.

- The only remaining unclear issue is the ventilation. For the bathroom in the small apartment, this would discharge into our living room...

Best regards,
Alex

Feedback on the topic of embedding pipes from the manufacturer:

There is no reason why the HT pipes contained within the formwork blocks should not be encased in concrete. They are extremely durable, and either inside the house or immediately outside there is an access shaft, allowing you to reach the pipes in case of a blockage.

Leaving that area without concrete would be detrimental to both structural integrity and sound insulation. Furthermore, anyone aware of this could easily puncture the pipes there with a metal rod or similar tool. The same applies, by the way, to manufacturers who have reintroduced foam ribs in the blocks for cost reasons...

Regards, Alex

alexisan schrieb:
Not having concrete there would be bad for both the structural integrity and sound insulation.

Exactly, no one claimed that there should be no concrete there.

alexisan schrieb:
There is no reason why the HT pipes embedded in the shuttering blocks shouldn’t be concreted in.

For thermal and structural reasons, 100mm (4 inches) pipes simply do not belong in an exterior wall—regardless of whether they are plastered around, concreted in, or treated otherwise.

Wishing you much success with your project.

Caspar2020 schrieb:
For thermal and structural reasons, 100mm (4 inches) pipes simply do not belong inside an exterior wall, no matter if they are covered with plaster, encased in concrete, or whatever else is done.

Our architect, structural engineer, and builder all simply refused to install the downpipes within the exterior wall. So, a boxed-in enclosure was made instead...