Before the Core Drill Starts: How Contractors Can Reduce the Risks Hidden Inside Concrete

Core drilling often looks like a routine construction task. A penetration may be only a few inches wide, the drilling itself may take minutes and the location may already appear on a drawing. Yet what lies inside the slab can turn that small opening into a costly safety and schedule problem. Rebar, post-tension cables, electrical conduit, plumbing and communications lines are frequently embedded in concrete. Striking any of them can lead to injuries, structural concerns, damaged building systems, emergency shutdowns, repair work and delays for multiple trades. For contractors, one of the most effective ways to manage those risks is to treat every penetration as a field-verification task rather than a simple drilling assignment. Pre-drilling verification does not eliminate every uncertainty, but it gives project teams better information before irreversible work begin. Why Concrete Penetrations Carry More Risk Than They Appear To Concrete conceals critical building components by design. Reinforcing…

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