SCIENCE - EXPLAINED on Instagram: "Each massive segment you see was cast off-site under tightly controlled conditions to achieve exact strength, alignment, and durability. When it’s time to install, millimeters matter. Cranes position the segment with laser-guided accuracy while engineers monitor load balance, tilt, and stress in real time. High-strength post-tensioning cables are then threaded through internal ducts and tightened to lock the segment into place, turning individual pieces into on