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OOoooppss.... (ME)

[Deleted User]
[Deleted User] Posts: 0
in THE MAIN WALL
comes into the side of the sensor well, near the bottom of the well, and in this case was poured in 6" of cement. No vertical movement of the conduit could be accomplished to facilitate the need for vertical movement. Wish there was a better way to do it...

If you build it, they will come...

ME

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Comments

  • [Deleted User]
    [Deleted User] Posts: 0
    Speaking of the mother of invention...

    During the process of construction, mistakes happen. Take for example the snowmelt sensor we set for the back dock area of our current monster snowmelt system. I performed due dilligence and use a 6 foot level to make sure that I had the proper elevation on the one critical control element, the slab sensor. Somehow, between the time I set the sensor and the "mud men" came back and turned everything grey, the sensor ended up being 1-3/8" lower than it should have been.

    Don't you just hate when that happens?

    Fortunatley for me, the pour was being closely scrutinized by the GC for whom I was working, and he called me on the cell phone (I was 120 miles away during the pour) and asked for my advice. I advised him to have his finisher NOT cover the sensor over with concrete, but to taper the concrete down to the head of the sensor, which they did.

    My thinking was that it could be fixed, somehow. Not having to find it below the surface of the concrete meant a lot.

    4 months later, it was time to finish the system in the back of the building and I started asking my supplier if there were extension rings or something that I could use to raise the face of the sensor. "Not a chance", he said, "Good Luck, hope you don't hit any of the tubes with that surgical jack hammer of yours, heh heh heh.."

    So, being the innovative person (McGyver) that I am, I set out to resolve the situation. I purchased another brass sensor socket, and using my carbide bladed non ferrous chop saw, I cut the exact amount that I needed (1-3/8") to make up the difference, soldered the extension onto the already poured in concrete sensor receiver, sealed it with epoxy on the inside to insure water tightness, and floated the whole thing with a slurry of nonshrinking grout.

    To insure that the grout patch remained stable on top of the existing cement, I drilled a number of small holes into the cement and installed 16 penny nails (with the sharp ends cut off)to act as tie rods to tie the patch to the original concrete. It oughta hold.

    Tomorrow we pull the sensor wire through and set the sensor in its final resting position, 1-3/8" higher than it originally was.

    We are obviously getting to the end of the worlds (my world anyway) largest snowmelt project. I started this job one week before classes started RRCC, and I'm finishing one week after classes have been completed. One semester job.

    Enjoy!!

    ME

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  • Paul Pollets
    Paul Pollets Member Posts: 3,663
    Why not

    float the sensor in a sleeve and set it at final height after the pour? That way you can seal the edge with grout or silicone and not worry about being 'cast in stone'.

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  • [Deleted User]
    [Deleted User] Posts: 0
    How....

    do you propose we make the wire/conduit connection float?

    If you invent it, they will come....

    ME

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  • Tony_4
    Tony_4 Member Posts: 14
    Cant you

    Box around the sensor and pour it in when they are done. We use to do this on jobs with alot of floor drains because the drains were only adjustable until poured and the concrete contractor didnt care what the finish floor was.
  • Tony_4
    Tony_4 Member Posts: 14
    could you use

    a piece of flexible conduit Mark? Like we use to connect outdoor condensing units.
  • Mark Eatherton1
    Mark Eatherton1 Member Posts: 2,542
    The hole...

    would have to bee extremely elongated like a tear drop in order for a flex connector to be of any advantage. I'm thinking more on the lines of a tube within a tube "O" ring sealed telescopic device that could be adjusted from 3-1/2" to 6" in length, AFTER the fact.

    If you build it, they will come...

    Thanks to all for their input.

    ME

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  • tombig
    tombig Member Posts: 291
    McGyver

    We were all McGyvers before he was!
  • Mark Eatherton1
    Mark Eatherton1 Member Posts: 2,542
    Funny thing...

    a few months back I spent a VERY long weekend with a group of professional energy types putting a "demo tape" together for a pilot that we were hoping to sell to one of the networks. We hired a professional camera man, and he actually used to WORK with McGyver doing the special effect shots. What a weekend.

    Still looking for someone to run the show...

    ME

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