Cutting of slabs during interior demolition, and supporting the opening

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When you are doing interior demolition, you may sometimes need to cut opening at concrete slab for new duct penetration. Make sure to get structural engineers input before doing that. In some cases if the opening is small enough there is no problem however if you are cutting a slab piece of more than 1’x1’ in general, be prepared to install steel support angles around the opening in order to reinforce it.

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