Concrete Tread Damage
Concrete, metal and wood sometimes just
don't work well together. The concrete tread with a
steel bracket connecting to a wood stair stringer could become a problem.
The lower tread at an angle like this might not be as big of a problem as a stair tread falling from the center of the stairs. But this nevertheless is a problem. The concrete stair tread is just missing a couple bolts, this is an easy fix.
Another temporary solution to this problem is to put some sort of a concrete block or metal bracket underneath the bottom stair tread.