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· Civil Engineer
5,832 Posts
I cannot tell from the photo if there is any difference in elevation across the crack. It does not look like it, but please measure the elevation difference by placing a straight edge across the crack and measuring the difference.

That crack looks too straight to be from settlement. As odd as it sounds, that looks like a home made control joint, maybe cut with a circular saw, and not perfectly straight. If there is only a small difference in elevation across the crack, that would tend to confirm the home made control joint theory.
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