ᐅ Intersecting utility lines from different service providers

Created on: 10 Apr 2021 19:33
A
aHOD_88
Hello,

we are building a house without a basement.
On the ground floor, we have a reinforced concrete slab, 25 cm (10 inches) thick. The masonry is complete, and the roof framework is currently being constructed.
Our builder wants to apply bituminous membranes onto the concrete slab before the electrician and HVAC technician lay their cables and pipes.
I have spoken with both, and the plan was for the electrician to install their wiring first, while the other service providers would follow and cut into the slab at the points where their lines cross, so the electrical cables would lie in a small recess. However, this process would damage the membrane, and the builder is strongly opposed to cutting into the slab.
His argument is that we have a total floor build-up of 20 cm (8 inches) where all the lines can fit without cutting into the concrete.
So, what is the best way to handle line crossings to avoid technical issues with any of the trades?
According to the installers, the procedure they propose is common practice.

Best regards,
André
11ant11 Apr 2021 02:49
WingVII schrieb:

I can only imagine that empty conduits were forgotten.
To me, it sounds like the shell construction was done with a general contractor, followed by self-managing the individual trades...
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Mycraft11 Apr 2021 08:34
Crossing pipes on the foundation slab or on the raw subfloor in the upper floor are completely common and comply with recognized engineering standards.
H
hampshire
11 Apr 2021 08:53
Who coordinates the construction?
W
WingVII
11 Apr 2021 09:47
Mycraft schrieb:

Crossing pipes on the ground slab or on the structural subfloor in the upper floor are completely common and comply with recognized technical standards.
Yes, that seems to be the case. However, with conduit pipes and today’s planning options, it is no longer considered best practice to significantly break up the ground slab afterwards. You can tell that even the builder opposes this approach.
Mycraft11 Apr 2021 10:00
I didn’t say that either. Any chiseling into the concrete slab is completely unreasonable and is only done when all other options have been exhausted.

However, crossing conduits or pipes for any utilities is standard practice. Of course, it is always best to minimize crossings wherever possible.
W
WingVII
11 Apr 2021 10:02
@Mycraft Sorry, yes, I just got up.