ᐅ 20 cm Ceilings, 7 cm Ventilation Ducts – Is That Feasible?

Hello everyone,

maybe this topic has already been discussed. As far as I know, the reduction is too high.
But our structural engineer thinks it is negligible. Attached is an excerpt from the plan.

Perhaps there are already experiences on this topic here.

Best regards and thanks in advance.

AvH

alexisan schrieb:

From what I know so far, the weakening is too great.

Where does your knowledge come from? Are you a trained structural engineer or just guessing from the internet?

alexisan schrieb:

But our structural engineer says it is negligible.

If the professional says "yes," but you think you know better, what do you expect from laypeople here?

The general contractors here usually use 22, but my structural engineer wanted 24. Whether 20 would be sufficient should be determined by the structural engineer.

I would recommend removing personal information from the plans.

Are the 7cm (3 inches) actually deducted from the 20cm (8 inches)? Or are they part of the construction, meaning the load-bearing structure is not weakened at all?

Best regards

Thank you very much for the RM. The permitted total height above the finished floor level is fully utilized. Therefore, thicker ceilings will be challenging.
I also find 20cm (8 inches) hard to imagine, especially considering the upper reinforcement layer and concrete cover.
I will point out this issue once again...

Otherwise, it will have to go into the screed. But even there, with a total build-up of 15cm (6 inches), there is hardly any space...

Regards

alexisan schrieb:

Attached is a section of the plan.

Has your project become smaller? I remembered it being larger.

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