In your country, do you use pipe to run wire through very much?

[bansalrehana]

I think some of this was intended as humor but did not work out as funny.

 

[Dustydazzler]

The funniest thing I have seen in ages was a video of a cooker hook up by electwix but it got deleted

 

[Maji236]

From a good practice point of view the trench should have been blinded with a concrete layer or clayboard to lay the reinforcement/ducts on, this would prevent the concrete from being contaminated by stones and earth kicked up when the concrete is poured into the formwork, the stones and earth can facilitate a path for moisture and rusts the reinforcement this in turn expands and breaks open the concrete (concrete cancer) at best or the ducts at worst.

I think the duct bank will be good for 100 years or better. But your welcome to take that up with an architect.
Normally I see a footer or concrete wall for a building; whether pre cast or otherwise, it's filled back in with dirt around it.

 

[Mike Johnson]

You have not understood my post, try reading it again.

 

[Maji236]

You have not understood my post, try reading it again.

I don't see how rock or earth will get in the concrete as it's poured. It gets pushed out by concrete, not mixed in. In fact some concrete have aggregate added for strength, which is essentially rocks.

As I explained previously, we were required to put 1.5" thick block under the interlocking plastic spacers that the conduit is set in. So now, with the spacers holding the PVC above the earth by 2 or 3", & the block another 1.5", there is a gap of 3.5" of concrete under the PVC.

 

[Mike Johnson]

Well you can go against the perceived wisdom of every Structural Engineer and carry on thinking that way, it's up to you, but don't try and get a job as a Ground Works Engineer.

 

[Maji236]

Well you can go against the perceived wisdom of every Structural Engineer and carry on thinking that way, it's up to you, but don't try and get a job as a Ground Works Engineer.

As I said before, this was how it was engineered. There was a detail in the prints that laid it out as such. So apparently, I'm not the only one going against your 'percieved wisdom'. The ONLY difference was the engineer wanted it raised a bit more, so I had my crew put patio block under the supports, which was approved by said engineer.
I try not to make a habit of second guessing & calling out the engineers. But I do know a few engineers that do.
Thanks for the heads up, mate.

 

[Mike Johnson]

Big difference between a "Site Engineer" and a "Structural Engineer" in my working life I sat on the main board of the Institute of Structural Engineers and a few other construction related Institute's and Association's, so know a little about the process.

You can prevaricate as long as you like, but that trench should have been blinded and not as shown as bare earth which would contaminate the concrete.

 

[nicebutdim]

Big difference between a "Site Engineer" and a "Structural Engineer" in my working life I sat on the main board of the Institute of Structural Engineers and a few other construction related Institute's and Association's, so know a little about the process.

You can prevaricate as long as you like, but that trench should have been blinded and not as shown as bare earth which would contaminate the concrete.

Unless I've missed something, you're arguing with an electrician who is following an engineer's instruction. It's not really their place to tell that engineer how to do their job.