Protruding iron rod

A house has been under construction at 93 Dob Street for years, and unfortunately the sidewalk has also been destroyed. The biggest problem is that there is a long iron rod sticking out at the base of the house. There is a kindergarten next to it and a school not far away. Many children ride scooters and small motorbikes. I am afraid that someone will fall into it. I have already told the workers, but they have not cut it down. We would be very grateful if they would solve this problem.