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Old 01-10-2017, 07:49 PM   #1
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Control joint around column


From what I read, concrete pads around columns should have a diamond shape notched around them. However in my picture, I have a concrete column that was poured before the slab. It's a very deep footing. When I pour my concrete slab around this concrete post, should I create a diamond shape around it or should I have the joints coming off all four corners of the concrete post in every direction?


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Old 01-10-2017, 08:00 PM   #2
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Re: Control joint around column


Control joints from the corners or a round sono tube over the column so it has no square corners. Then fill in the round after.

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Old 01-10-2017, 09:24 PM   #3
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Re: Control joint around column


Could I just do expansion joints around it instead??
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Old 01-10-2017, 10:21 PM   #4
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Re: Control joint around column


Expansion joint would work as well as a control joint.
The post should be isolated from the slab somehow.
The round sonotube works too.
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Old 01-10-2017, 10:34 PM   #5
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Re: Control joint around column


A square inside corner is weak point and very often the source of a crack. You would have been much better off with a round post instead of a square one.
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Old 01-11-2017, 05:26 PM   #6
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Re: Control joint around column


its already in place - expansion jnt imo
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