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Old 10-01-2019, 11:12 AM   #1
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Default Cutting rebar

If a trench about 18” wide has been made in a concrete floor, what happens if you cut out rebar across that span? Is there a chance that the floor could sink?
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Old 10-01-2019, 11:20 AM   #2
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If a trench about 18” wide has been made in a concrete floor, what happens if you cut out rebar across that span? Is there a chance that the floor could sink?
Anything is possible. How long is the trench and how many rebars would be cut?

After installing my conduits or whatever, I would tie wire new pieces of rebar to the existing ones. You have then essentially put it back the way you found it.
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Old 10-01-2019, 11:24 AM   #3
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Whenever I've seen trenches cut in concrete floors, the GC always drills holes in the sides of the trench and epoxies rebar pieces into them, then lays rebar longways down the trench and ties it all together before pouring. This restores the structural integrity of the slab.

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Old 10-01-2019, 11:46 AM   #4
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Actually, it’s about 12”. Might have to cut all three.
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Old 10-01-2019, 11:55 AM   #5
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Do not cut that steel.
Ask the GC what he's going to do and let him do that work.
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Old 10-01-2019, 12:13 PM   #6
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You already have it exposed. Why can't you work around it?
I thought you were saw cutting the concrete initially.
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Old 10-01-2019, 12:39 PM   #7
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Wet cutting is the style, for it does not destroy the integrity of the slab.

Nabs has it right.

The cut should've been subbed out to pros.

This looks totally DIY.
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Old 10-01-2019, 01:14 PM   #8
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The concrete was opened up before I was called in. Thanks, guys. I will figure out a plan B and keep the rebar intact.
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Old 10-01-2019, 03:54 PM   #9
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that is big rebar for a slab.....it looks like it's for a grade beam or a footing of some sort.....i would ask someone before i cut it.
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Old 10-01-2019, 05:17 PM   #10
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Don't cut it. Three big ones in a row means something
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Old 10-01-2019, 06:46 PM   #11
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The concrete was opened up before I was called in. Thanks, guys. I will figure out a plan B and keep the rebar intact.


Good plan!
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Old 10-01-2019, 08:29 PM   #12
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Quote:
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If a trench about 18” wide has been made in a concrete floor, what happens if you cut out rebar across that span? Is there a chance that the floor could sink?
Cut 12” out of the middle, do your work. Buy enough #3s or #5s to cut 9 pieces 18” long. Tie wire 3 of them around each of the 6” cut rebar stubs nice and tight 120 degrees apart. Place the cut pieces in the middle if you want to hide the evidence. Pour concrete.
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Old 10-01-2019, 08:35 PM   #13
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The concrete was opened up before I was called in. Thanks, guys. I will figure out a plan B and keep the rebar intact.
The idiot shouldn’t have cut a footer like that. There is a formula to fix that and cutting the rebar isn’t going to matter. They will have to dig under it a certain amount on each side and pour a kind of platform and tie them together with rebar somehow. Or maybe a piling if that can be dug.
It’s a real problem. I hope your guys didn’t do it.
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Old 10-01-2019, 09:33 PM   #14
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The idiot shouldn’t have cut a footer like that. There is a formula to fix that and cutting the rebar isn’t going to matter. They will have to dig under it a certain amount on each side and pour a kind of platform and tie them together with rebar somehow. Or maybe a piling if that can be dug.
It’s a real problem. I hope your guys didn’t do it.
Nope.
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Old 10-01-2019, 10:35 PM   #15
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IF it is a structural slab, then the engineer may require rebar couplers.
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Old 10-02-2019, 05:29 AM   #16
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IF it is a structural slab, then the engineer may require rebar couplers.
It looks more like a footer to me, interesting product.
The fun starts on page # 49.

http://www.daytonsuperior.com/docs/d...nghandbook.pdf
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