Alwayslearningelec
Senior Member
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- NJ
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- Estimator
Its fancy styrofoamwhat is geofoam? and why would there be no soil there?
If that figure is an illustration of the proposed alternative installation method, I'd tell them it will be 4 or 5X, thank you very much. I won't say this is impossible to construct, but how, for just one question, would you backfill once the slab is in? Lots of guys with shovels? What about compacting the fill? Run the tamper sideways?They are saying the conduits would be concrete encased . They want a deduct to lay the conduits in the dirt.
I think that the proper interpretation of note 1 would answer the OP's question, now if were written in a complete sentence that would help.count me as also confused. Note 1 seems to be incomplete also.
The OP detail addresses the conduit support, it does not show the actual concrete and rebar details.I see no rebar in the slab or vertical posts. Note 1 incomprehensible. Need nuts on top of the Unistrut if this is supposed to be in mid air when the concrete is poured. And then the concrete guys need to run rebar around this assembly.
This is something that I ran across in Charleston a few years ago. The reasoning behind it was that if the soil got washed away in a hurricane or tropical storm then the feeders of the duct bank would not get as easily destroyed and washed away. We installed these on all of the duct banks on a huge multi-use facility. We just made sure to use a transom to determine where the slab was going to be so that the tops of the rods in the rod holders were in approximately in the center of the slab. They were still a pain to install and reminded me a little of the seismic supports needed in earthquake prone areasHas anyone ever seen or installed conduits like this?
These are slab on grade.
Not sure why wouldn't just put in the dirt?
Obviously much more labor intensive then laying on ground on chairs/spacers.
Interesting. I am glad someone had some idea what this might be about.This is something that I ran across in Charleston a few years ago. The reasoning behind it was that if the soil got washed away in a hurricane or tropical storm then the feeders of the duct bank would not get as easily destroyed and washed away. We installed these on all of the duct banks on a huge multi-use facility. We just made sure to use a transom to determine where the slab was going to be so that the tops of the rods in the rod holders were in approximately in the center of the slab. They were still a pain to install and reminded me a little of the seismic supports needed in earthquake prone areas