Drill hole in lightweight concrete slab

[Gimner]

I need to drill a hole in my lightweight concrete slab and I'm a bit unsure about how to make the hole.

Should I make the hole like the blue one, between two of those Blocks?

Or should I center it and make it in a block like the red one?

 

[Gimner]

No one who can help me?

 

[lapower]

What is the hole supposed to be for?

Are there cables/pipes in the wall?

You are the only one who can decide where the hole should be.

 

[vilpi]

With such large holes, you probably need some relief.

I vaguely remember that it is possible to make a circular hole with a diameter of half the element's width. Check with a designer or manufacturer.

What do you need a giant hole for?

 

[Gimner]

It's not a road; it's a floor structure between the basement and the upper floor. The conduit will be for all the pipes to the electrical panel and network, as well as for audio and video. There are likely to be several pipes.

I don't know who the manufacturer of the lightweight concrete is.
The house was built in '64.

 

[vilpi]

Weber has floor slab elements in LECA.
Should have approximately the same properties

 

[marmi]

From what I have read about lightweight concrete flooring, it is most suitable to make openings in the joint between them as the reinforcement is centered in each element.

Check out page 10 (p 136) www.yxhult.se/_pdf/bjalklag_s127-142.pdf