Foundation for double-T beam (ceiling support) tilted

Good morning dear forum,

I had a little mishap while making a foundation: the foundation turned out slightly crooked (1-2mm).

Initial situation:

[*]Creating a foundation for a double-T beam to support a ceiling, after partial removal of a brick section.
[*]Everything was carried out according to the structural engineer’s specifications (height of the foundation, etc.).
[*]Foundation dimensions: width: 24 cm, length: 30 cm, height: 18 cm, with corresponding reinforcement steel.
[*]Distance from foundation to ceiling: approx. 14.4 cm

Unfortunately, after the first drying overnight, the foundation became slightly crooked – more precisely, it slopes forward and slightly down at the edges. You might be able to see that well in the picture.

Thus, the double-T beam would not lie flat.

The rear height is correct, but at the front and sides about 1–2 mm are missing. The foundation was set at the bottom with rather dry concrete (and compacted), and for the top few centimeters I used somewhat more fluid concrete to allow a (presumably) better leveling.

My question to you:

[*]How can I now create a level adjustment?

I think this can (perhaps) no longer be compensated afterwards because the concrete itself is too coarse-grained to compensate for 1-2 mm. Then I got the idea to remove a few centimeters again and redo the top. But I am not sure whether that would meet the required stability.

The frustration is great, but I think the advice given to me to work more fluidly at the top was not really helpful for me as a private craftsman. I tamped the concrete with every layer, but I’m no longer sure whether it was sufficient.

Well, here I stand now and am at a loss.

I would be grateful for your advice and already wish you a successful and pleasant week.

Best regards, Hans

Now the concrete is still fresh and can (carefully) be smoothed well. Sanding would be an option or a float. When it hardens, use an angle grinder with the appropriate disc.

Hello,

don’t stress yourself more than necessary for now. Nothing serious has happened yet.
At least in the picture, it doesn’t look worse than what companies usually do with such concrete pads.

First, I have a few questions:
1. Which steel profile is planned here? IPE 140, HEB 140, HEA 140 with some clearance?
2. Have you already received the steel profile? Warning: 90% of them are "bent as hell," i.e. flanges not parallel, often with web offsets
3. Is the ceiling underside very straight or does it sag a bit?
4. What is supposed to happen with the opening once the beam is installed? Plaster carrier boards, concrete filling, somehow drywall attached?

Sanding with a grinder and sanding cup is very easy, but creates a lot of dust! Tape off the openings of the adjacent rooms!

The foundation has become slightly crooked (1-2mm).

If the millimeters are not a typo, I don't understand your problem. I have never heard of such a tiny tolerance during construction. Are you a watchmaker or some other kind of precision metalworker?