@architectzvideos: Two workers. Same concrete. Same formwork. One difference: VIBRATION. 🏗️ Those holes you see in hand-tamped concrete (honeycombing) weaken the bond between steel and concrete, drop the strength — and that column cracks years later. Using a needle vibrator isn’t 2 extra minutes of work, it’s the decision that determines the lifespan of the building. Send this to a friend on site — it might save a structure. 👷♂️⚡ #construction #civilengineering #concrete #concretework #structuralengineering