Rough-in products for concrete tilt-up panels?

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krist003

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Anyone do any tilt up buildings? I am trying to find a better way to rough in boxes in the panels (for receptacles, exterior scones and interior exit signs). Since they pour the tilt up panels on top of the slab, the electrical box that faces down against the slab flushes out nicely, but what about the box facing up when they pour? There has got be to some cool products out there that help hold them in place and keep them flush. I could have sworn I have seen some kind of stand-off device or something. We typically use tie wire to the rebar and tape the boxes up really good, but it takes time and you have to worry about the concrete guys bumping them out of place.

Any info on a better mouse trap is appreciated. Whatever the device is, I suppose we would have to get approval because it will become part of the pour and embedded in the wall forever. Thanks for the help.
 
Can you cut a piece of wood to fit? Then with a wood chisel break out the wood? Or something like that?
Just a thought.
 
krist003 said:
Anyone do any tilt up buildings? I am trying to find a better way to rough in boxes in the panels (for receptacles, exterior scones and interior exit signs). Since they pour the tilt up panels on top of the slab, the electrical box that faces down against the slab flushes out nicely, but what about the box facing up when they pour? There has got be to some cool products out there that help hold them in place and keep them flush. I could have sworn I have seen some kind of stand-off device or something. We typically use tie wire to the rebar and tape the boxes up really good, but it takes time and you have to worry about the concrete guys bumping them out of place.

Any info on a better mouse trap is appreciated. Whatever the device is, I suppose we would have to get approval because it will become part of the pour and embedded in the wall forever. Thanks for the help.
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well, there is a way..... but there is a catch...

you have to have a box on both sides of the wall with a nipple thru,
connecting them. as it's usually an industrial building, this isn't a problem

get two 4SD boxes, put FA's on the one facing inside, so you can get down
to the pour strip, and pipe them together. put a 1/2" emt nipple between the
two boxes, to hold the finish wall dimension. you can prefab these for fast install
at the time. put rings on them. i like to use 1" rings, lets the concrete encase the
ring better. be sure to put ground pigtails on both of the boxes.

when they get the wall formed up, go mark where you want to have the box, and drill a 6" deep 1/4" hole in
the slab. drive in a wedge anchor, and put a rod coupling on it. spin on a piece of 1/4" running thread,
and slide the boxes, with nipple between them over the running thread. put on a fender
washer, and a nut. tighten it down. pipe down to the bottom of the wall, and turn the
conduits so you can get onto them later.

the box won't go anywhere.

after the pour, take off the nuts and running thread. when they stand the wall,
go back and drive the wedge anchors below finish of the slab.
 
I'd walk into a supply house that sells rebar and see what they have on today's market for chairs. Some good chairs would give you the elevation and you could tie to the rebar for your horizontal fix. These too could be prefab'd at your shop to save time on the site.
 
Thanks for the suggestions guys. In the past, we have prefabbed the set up that fulthrotl mentioned and it works pretty well, just thought there might be a new product for this type of thing. I appreciate the responses.
 
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