The Dangers of Cutting Concrete without an Engineer

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x ray machine-concrete slab

Complete Building Solutions was recently called out to inspect the concrete slab on a 36 story building in Minneapolis. A contractor working on the site was looking to install new plumbing and would need to cut into the concrete to do this. After X-raying the floor he became concerned that the slab was structural. He noticed that some of the slab was poured 7-12 inches thick, the footings were 20 feet deep, and some of the existing rebar was placed only 2-3” apart from each other. Because of this, he no longer felt comfortable to proceed without an engineer’s opinion.

Concrete Slab

The video below shows our team and the contractor working together to examine the floor.

Complete Building Solutions determined that the slab was NOT structural and that it was safe to proceed with the plumbing installation.   Our engineer’s then provided a scope of work to the contractor on how best to fill the voids under the concrete floor and place the new concrete floor with the proper rebar installation.

Engineers -structural slab

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