@engineer.nelson.p: 🔨 How do engineers "see" inside a concrete pile without digging it up? The Pile Integrity Test (PIT) uses a simple hammer strike and a sensor to send stress waves down the pile — any defect, void, or crack shows up in how that wave reflects back. Fast, non-destructive, and a must-know test for every foundation engineer. 👷♂️ #PileIntegrityTest #StructuralEngineering #CivilEngineeringPH #FoundationEngineering #EngineerNelsonPH